It seemed on a frenzied January night in Kansas City as though the AFC title would be decided by the toss of a coin.

The Kansas City Chiefs were the beneficiaries, coming up the field one last time to beat the Buffalo Bills, but Patrick Mahomes and Co. were not to make the Super Bowl.

That the Chiefs were stunned by the Cincinnati Bengals in the AFC Championship Game said a great deal for the strength in depth of the conference.

And that has been ratcheted up to another level over the course of the offseason, with Russell Wilson and Davante Adams among the notable names traded into the AFC.

The NFC may still have the defending Super Bowl champions, but there are no shortage of contenders here – including as many as four in one wild division out west.

The favourites

The Chiefs and the Bills would both have been hugely disheartened by the manner in which their seasons ended. Kansas City had the fortune that deserted Buffalo but were unable to make the most of their reprieve against the Bengals.

But that will merely make Mahomes and Josh Allen two of the more motivated superstars heading into the new season.

Mahomes is now without Tyreek Hill, yet the Chiefs' offensive line went from strength to strength as last season wore on, ranking third in pass protection win percentage by the year's end.

Meanwhile, Allen showed in that playoff blockbuster he can be every bit a match for Mahomes at his best. He threw nine touchdown passes across his two playoff games; no player had previously thrown more than seven while playing two games or fewer in a single postseason.

Allen will hope not to get the chance to better that record, this year targeting a run that goes far beyond the Divisional Round.

In the mix

The Bengals of course have to be considered after pushing the Los Angeles Rams all the way, while the Tennessee Titans actually matched the Chiefs for the best regular season record in the AFC despite Derrick Henry being limited to eight games, though the trade of receiver A.J. Brown to the Philadelphia Eagles may restrict their ceiling on offense and ability to compete this year.

Deshaun Watson's suspension will give the Cleveland Browns work to do just to make the playoffs, but they may well be a serious threat if they get there.

A conference packed with quarterback talent also includes former MVP Lamar Jackson, who is fit again and looking to set the Baltimore Ravens back on course after a difficult 2021 in which they finished bottom of the AFC North.

But if the Chiefs are the team to beat, perhaps one of their division rivals can cause an upset. Each of the Los Angeles Chargers, the Denver Broncos and the Las Vegas Raiders have reasons to be optimistic.

Four contenders in the wild, wild AFC West

The Chiefs have won the AFC West six years in a row, but there is no guarantee that will become seven. The scale of the challenge before Kansas City represents a big boost to their AFC rivals – and to the neutrals, licking their lips at a must-watch season-long tussle.

Justin Herbert has long looked like making the Chargers contenders, with just the 14th 5,000-yard passing season in league history helping his offense finish fourth in the league in yards per game (390.2) and fifth in total points scored (747) last season. Crucially, the Chargers have added defensive help in the form of Khalil Mack and J.C. Jackson now, too.

Yet their offseason work perhaps pales next to that of the Broncos and the Raiders.

Wilson left the Seattle Seahawks for Denver, who promptly handed him a huge contract, clearly feeling he and Nathaniel Hackett can be the QB-coach combo they have been missing to return them to the postseason.

Support for that belief comes from Wilson's performance in quarterback Efficiency Versus Expected (EVE), which measures a signal-caller's performance in expected passing situations against the league average. Despite playing only 14 games on a Seahawks team that finished in the NFC West cellar, Wilson was still 13th in EVE, just behind Tom Brady.

Meanwhile, Adams has reunited with former Fresno State team-mate Derek Carr on the Raiders, with Stats Perform's positional rankings subsequently considering Las Vegas to have the most talented skill players in the NFL.

The Chiefs will undoubtedly now be made to work for the division after years of dominance. 

Lamar out to right last year's wrongs

With half of the conference potentially in contention for a Super Bowl run, there is perhaps no true sleeper pick, but the Ravens will expect to go from worst to first in their division.

Much will depend on a return to form for dual-threat superstar Jackson.

Baltimore were firmly on course for the playoffs at the time of the ankle injury that kept Jackson out of the run-in in 2021, collapsing thereafter. However, it had already been by far the QB's worst season as a regular starter.

After 3,127 passing yards and 36 passing TDs and 1,206 rushing yards and seven rushing TDs in his MVP season of 2019, Jackson had regressed slightly in 2020 and struggled further last year both through the air and on the ground.

In 12 games, Jackson threw just 16 TDs to 13 interceptions, while his 767 rushing yards saw him finish second among QBs to Jalen Hurts – a category he had dominated in the previous two campaigns.

Everything the Ravens do when they are good goes through Jackson, so his performance level will make or break their season.

Can Tua turn his fortunes around?

With the wealth of talent at the top of the AFC, there must also be some dregs at the bottom. The Miami Dolphins might fear they belong instead to that category.

The Dolphins made their own big move this offseason, taking elite receiver Hill out of the AFC West to give Tua Tagovailoa little excuse in his third season.

Hill got open on 82.7 per cent of his targets last season, with those skills of separation sure to come in useful when attempting to link up with a passer in Tagovailoa who threw to an open target just 73.8 per cent of the time.

The Dolphins are not expecting Tagovailoa to be Mahomes, but they need him to be much better than he has been thus far for this project to work.

The time is almost upon us. When that first ball is kicked at the start of the Los Angeles Rams' opener against the Buffalo Bills on Thursday, we will be on our way to yet another enthralling season of NFL action.

And there are few better reasons to get excited at the beginning of a new campaign than the promise of a good old redemption story.

These tales may not necessarily revolve around someone who has suffered a fall from grace, though; in some cases, it might just be someone who has taken a smidge longer than expected to blossom.

So, before the thunder and lightning of a new NFL season, Stats Perform has taken a look at five men who could have a touch more motivation to show everything they have to offer in 2022.

Baker Mayfield – Carolina Panthers

Mayfield perhaps leaps out as the most obvious choice.

Big things were expected of the quarterback when he was the number one pick of the 2018 NFL Draft, charged with leading a flailing 0-16 Cleveland Browns.

There were moments of promise in his four years in Cleveland, throwing 27 touchdowns in 14 games in his first season, and in 2020 he played a big part in getting the Browns to the playoffs, unthinkable when he came through the door.

However, in 2021, Mayfield threw just 18 TD passes, the worst season of his career, as a Browns team who were starting to feel like they had outgrown him finished 8-9.

Of quarterbacks to have more than 300 passing attempts, only Sam Darnold (59.9), Trevor Lawrence (59.6) and Zach Wilson (55.6) had a lower pass completion percentage than his 60.5.

After a lot of uncertainty, he finally found a new home after being traded to the Panthers, who are in desperate need of a quality QB after the Darnold experiment failed last year.

It is a risk for both parties, and both need it to work, but you could also argue it could not get much worse for either.

Gabe Davis – Buffalo Bills

There had not been any immediately obvious signs that Davis was going to be a breakout star for the Bills for most of his first two seasons.

Seven TDs in his rookie year – and none in the playoffs from only four catches – were followed by just six in the 2021 regular season.

However, thanks to his explosive performance against the Kansas City Chiefs in last season's playoffs, plenty are excited about what could come from Davis and the much-fancied Bills in 2022.

His four TDs and 201 yards from eight receptions – for an average of 25.1 yards – were still not enough as the Chiefs ultimately won the AFC Divisional Round encounter in overtime, but Davis emerged as a potential new star.

By the end of the campaign, no player had recorded over 1,000 burn yards – yards in situations where a receiver 'wins' his matchup against a defender – from fewer receptions (45) than Davis.

But was this a one-off, or can Davis do it all over again? We will soon find out.

Trevor Lawrence – Jacksonville Jaguars

Lawrence could end up being a very similar story to Mayfield. He was also the number one pick for a team with little else going for it.

In his rookie year, Lawrence threw for 12 TDs, but his poor pass completion percentage was set out above.

He remained a busy man regardless, with only six QBs making more than his 602 pass attempts, but the Jaguars could only manage three wins, two more than in 2020.

Whether it was sloppy throwing or feeling the need to take risks with little assistance, Lawrence threw 26 pickable passes, with only four QBs who made over 300 pass attempts seeing a worse pickable pass percentage than his 4.59 per cent (Jimmy Garoppolo – 4.82, Taylor Heinicke – 5.04, Zach Wilson – 5.21, Davis Mills – 5.56).

There is undoubted talent there, hence the hype when he was picked up by Jacksonville in 2021, and it is surely just a case of Lawrence having more help and getting more experience. We will perhaps see this season.

Matthew Stafford – LA Rams

Yes, it's another quarterback, but with a twist. This one just won the Super Bowl, after all.

It may seem strange given the ring he has on his finger, but the situation with Stafford's elbow means he must prove himself all over again.

In terms of numbers, the Rams QB has now established himself among the elite. Stafford ranks in the top 12 all-time in completions (11th, 4,302), passing yards (12th, 49,995), passing yards per game (sixth, 274.7), touchdown passes (12th, 323) and game-winning drives (seventh, 42).

Crucially, he led the team to Super Bowl success last year, too.

But the Rams' hopes of a repeat are pinned on Stafford being fit enough to perform all year long, and there are some worrying noises around an elbow issue heading into the year.

Should Stafford shake off those concerns and combine with Cooper Kupp for another outstanding season – and perhaps another ring – nobody could possibly doubt his legacy.

Kliff Kingsbury – Arizona Cardinals

It is not just players who have something to prove, but coaches, too – and you could argue Kingsbury does more than most.

While undoubtedly a talented coach, Kingsbury is building a reputation as someone who comes up with effective plays to start a season but is less able to adjust to keep ahead of the competition once they figure it out.

After winning their first seven games, the Cardinals raced out to a sensational 10-2 start last season, well ahead of projected results, only to stumble to 11-6 after losing four of their last five in the regular season, before being humbled 34-11 by the Rams in their first postseason game.

The excellent start cannot be ignored, but neither can the fact that it made nine seasons in a row in which a team led by Kingsbury have had a worse second half of the season than the first.

Despite being without DeAndre Hopkins for the first six games due to suspension, Kingsbury has an exciting team in Arizona and it would be no surprise to see them start strongly again.

They just need to figure out a way to maintain it this time.

Istanbul awaits next June, and this week the journey starts as the group stage of the Champions League begins.

Of course, the ultimate goal is to reach the final and lift the trophy. Most will fail in that quest, but that's not to say those who don't win the competition are failures.

Every year we enjoy breakout seasons from individuals in the Champions League as they announce themselves on the biggest stage.

Whether those performances earn big-money moves or simply greater acclaim, you can expect there to be a few players you might not be very familiar with who go on to impress.

Ahead of the first round of games, Stats Perform has identified a few to keep an eye out for.

Tanguy Nianzou, centre-back, 20 – Sevilla

After coming through Paris Saint-Germain's academy and then spending a season at Bayern Munich, France youth international Nianzou joined Sevilla as the replacement for Jules Kounde in pre-season.

It's been a rocky start for the youngster. He's part of a defence that's looked extremely unconvincing, with their expected goals against (excluding penalties) of 7.5 the second-worst in LaLiga after four games, three of which Sevilla have lost.

On matchday one, Nianzou will come up against Erling Haaland and Manchester City. The defender is very highly rated, but this will be a massive test of his readiness for regular football at such a level.

Goncalo Ramos, forward, 21 – Benfica

If you believe transfer gossip, there were plenty of clubs ready to prise Ramos from Benfica in the transfer window, but ultimately he stayed put and will be considered Darwin Nunez's replacement this season.

A well-rounded striker, Ramos works hard, is up for a physical battle and is technically proficient. Last season, he scored seven Primeira Liga goals as back-up to Nunez, although his early form in that regard this term suggests work is needed.

His two strikes from 3.9 xG show he's getting into good situations but isn't yet proving clinical – albeit he did net four in Champions League qualifying.

Benfica are in a group with Juventus and PSG, so they'll hope Ramos finds a reliable streak to aid their outside chance of progression.

Khvicha Kvaratskhelia, winger, 21 – Napoli

The first winner of Serie A's Player of the Month award of the new season – and in his very first month in the league – it's been some introduction from Kvaratskhelia.

He was playing back home in Georgia in the second half of last season after being able to suspend his contract at Rubin Kazan amid Russia's invasion of Ukraine. His deal was then terminated by Rubin after it emerged he was subject to death threats after leaving.

Kvaratskhelia had been linked with numerous big clubs but eventually landed at Napoli as Lorenzo Insigne's replacement. They may not be anything alike as players, but that's not stopped Kvaratskhelia having a major early impact with four goals in five Serie A games.

A tall winger who possesses great dribbling skills, he's a player primed to make a statement this season.

Lorenzo Lucca, striker, 21 – Ajax

He may only be 21, but Lucca's fledgling career has already been somewhat nomadic, finding himself registered as a senior player at six clubs – the latest being Ajax, whom he joined on loan with an option to buy from Serie B side Pisa.

Remarkably, the last of his six league goals for Pisa last season came in October, so it's clear the jury is still out and he has a lot to prove, but he has the attributes to be a threat for any team.

Standing at just over two metres tall, Lucca is a giant, yet he also possesses a surprising turn of pace and is technically very good. The Italy Under-21 international has only played 21 minutes with the first team this season, but he has three goals in two games for the second string.

It's unlikely he'll be a key figure for Ajax, but given his skillset he will be a viable option at times – let's just see if he can take his chances.

Matt O'Riley, midfielder, 21 – Celtic

Last season, O'Riley was playing in League One for MK Dons; on Tuesday, he'll likely line-up against Real Madrid. It's been quite a quick ascension for the gifted midfielder.

A product of Fulham's academy, O'Riley left the Cottagers stunned when he rejected a new contract in 2020. He spent six months training with Dons and then signed for them in January 2021 – that saw him exposed to first-team football and a year later he was at Celtic.

The London-born Denmark Under-21 international has enjoyed a wonderful start to the season, with his vision and ball-playing abilities marking him out as a real creative threat and earning links to Manchester United.

How he fares in the Champions League with the step up in quality could prove crucial with respect to his short-term future.

For Erik ten Hag, there was never any doubt. Just three days after arriving from Ajax, and with only two training sessions with his new team-mates under his belt, the Manchester United boss felt Antony was ready to be unleashed in Sunday's meeting with Arsenal.

"He knows the style we want to play and what we expect and demand," Ten Hag, who coached Antony at Ajax in the previous two campaigns, told Sky Sports ahead of United's 2-1 victory. "He can particularly be an offensive threat with his speed in one-on-ones."

The tricky winger this week became United's second-most expensive signing ever at £68million – behind only the £89m paid for Paul Pogba – and made an instant impact with his goalscoring display against a previously perfect Gunners side.

Antony's well-taken strike after 35 minutes at Old Trafford gave United the lead in a game they had otherwise been second best in, with Arsenal – and Gabriel Jesus in particular – looking very dangerous in an attacking sense either side of that opener.

One of the first players to congratulate Antony was fellow attacker Marcus Rashford, who himself netted on his debut for United and also his first appearance in the Premier League, against Arsenal of all sides in a 3-2 home win six-and-a-half years ago.

And while Antony made a big impression on his United bow, this victory belonged to Rashford. The England international assisted the opener and then scored two of his own goals after Bukayo Saka had deservedly levelled for Arsenal in the second period.

It meant Rashford both scored and assisted in a Premier League game for the first time since October 2020 – and at the perfect time, too, with some calling for the versatile forward to make way from the side.

Selecting both Rashford and Antony was a big call from Ten Hag against an Arsenal side that boasted five wins from five prior to Sunday's contest at Old Trafford, the Dutchman changing a winning formula after three victories on the spin with the same XI.

At 22 years and 192 days, Antony became the youngest Brazilian player to score on his Premier League debut, and the first player from the South American country to net on his first appearance for United.

The ninth Brazilian to put on the famous United strip, Antony not only found the net but also lit up Old Trafford with some trademark Samba skills, the highlight being some neat footwork to beat two Arsenal players when seemingly going nowhere and helping to create a big chance for Christian Eriksen.

He played just short of an hour before being replaced by Cristiano Ronaldo – out of United's starting line-up for a fourth game running – and departed with the most shots of any player (three), the highest xG (0.32) and having attempted the joint-most dribbles (seven).
 
It was an inspired call from Ten Hag, who three weeks on from his appointment being questioned by some high-profile names following defeats to Brighton and Hove Albion and Brentford, is now instead being hailed as a managerial magician.

Time will tell on that front, of course, but the signs in wins over Liverpool, Southampton, Leicester City and now Arsenal have been hugely encouraging. 

Despite a first loss since back-to-back defeats derailed their hopes of Champions League football in the final fortnight of last season, Arsenal remain top of the embryonic table and if not for some contentious calls may well have come away with another victory.

VAR was again at the centre of controversy as a Gabriel Martinelli goal was ruled out at 0-0 after referee Paul Tierney, having being instructed to check the pitchside monitor, adjudged Martin Odegaard had fouled Eriksen in the build-up.

But thanks to Antony and Rashford, this day belonged to United. For the first time in 17 months, they have won four league games in a row and finally have momentum on their side in what is shaping up to be a promising future under Ten Hag.

Having snuck into the playoffs last season, the Philadelphia Eagles were one of the NFL's surprise packages in 2021 but will have to shoulder larger expectations heading into 2022.

A 9-8 record from last year presents a solid platform to build upon as the Eagles seek to wrest the NFC East crown from the Dallas Cowboys.

Their heavy playoff defeat to the Tampa Bay Buccaneers in the Wild Card Round illustrated how far the Eagles were from legitimate contention in 2021.

Philadelphia have made a series of significant moves to put themselves in position to challenge the elite.

Indeed, theirs is a roster that appears among the most complete in the NFL, piling the pressure on both quarterback Jalen Hurts and a well-rounded roster to make the strides that will be anticipated by Eagles fans in one of US sports' most demanding cities.

Can defensive additions pay dividends?

There is obvious room for improvement on Philadelphia's defense following their efforts of last year on that side of the ball.

The Eagles had opponents have a 10-play drive on 38 occasions, with only the Minnesota Vikings, Los Angeles Rams, Seattle Seahawks, Los Angeles Chargers and New York Giants having more, while the percentage of opponents converting on third down and short was the highest in the NFL at 74.2 per cent.

As well as struggling to get off the field on third down, the Eagles also had issues stopping significant plays on first down, with opponents passing for at least four yards 59.4 per cent of the time, again the highest rate in the NFL, while opposing offenses found the endzone on 45 of 74 drives on which Philadelphia allowed them inside the 30-yard line. Only the Las Vegas Raiders (61.2) allowed a touchdown on a higher percentage of such drives than the Eagles (60.8).

Philadelphia focused a lot of energy on improving performance in both of those areas.

The Eagles traded up in the first round of the draft for Georgia defensive tackle Jordan Davis, who at 6ft 6in and 341 pounds put on one of the most remarkable displays of athleticism the Scouting Combine has seen.

Davis will look to be an immediate force against the run and use his massive frame to make life easier for a talented group of pass rushers that now includes hometown hero Haason Reddick, whose 23.5 sacks over the last two seasons are the fifth-most in the NFL.

The addition of Reddick is a significant one to a defense that was eighth in pass rush win rate last year, and the Eagles have also done plenty to boost their chances of slowing down opposing aerial attacks.

By signing James Bradberry to pair with Darius Slay at starting cornerback, the Eagles now have the only two players in the NFL to register at least 15 interceptions and 80 or more pass breakups since 2016.

And their recent trade for C.J Gardner-Johnson gives the Eagles an ultra-versatile safety with the ability to play slot corner at a high level. Gardner-Johnson lost 33 of his 111 man coverage matchups last year, his open percentage allowed of 29.73 on the right side of the league average of 30.89 for corners.

The Eagles were a top-10 defense by yards per play allowed (5.20) in 2021 and their additions should theoretically help address the issues that prevented from faring even better.

However, defensive efficiency is famously volatile. Success is no guarantee despite the raft of impressive additions, and that is why the microscope will predominantly be focused on Hurts and the offense.

Will Philly love Hurts after 2022?

More consistency will be the order of the day for Hurts, despite the Eagles racking up 28.5 points per game between Weeks 8 and 18 as they went 7-3 over the last 10 regular-season games.

In 2021, Hurts' pass completion percentage stood at 64.1 from 449 attempts. Of quarterbacks to have more than 300 passing attempts, only Baker Mayfield (63.9), Trevor Lawrence (63.4) and Zach Wilson (58.4) had a lower figure.

Hurts' well-thrown percentage for 2021 was also below the league average of 78.1 for QBs with a minimum of 100 attempts, but that was in part a product of his aggressiveness. He averaged 9.3 air yards per attempt, fifth among signal-callers with at least 100 passes. Among quarterbacks to meet the 300-throw threshold, his average was only bettered by Russell Wilson (10) and Lamar Jackson (9.7).

The Eagles look to have assembled the talent around Hurts to deliver more stable production.

Philadelphia's marquee move of the offseason was to send a first-round pick to the Tennessee Titans for wide receiver A.J. Brown, who offers Hurts a physically imposing true number one option who excels in creating separation. His burn rate, which measures how often a receiver won his matchup with a defender on plays where he was targeted, of 64 per cent and his burn yards per route average of 4.0 yards was tied for the best among receivers with at least 100 targets (inc. playoffs).

But Hurts won't solely be able to rely on Brown. Though he displayed good chemistry with DeVonta Smith last year, Hurts needs his former Alabama team-mate to step up in terms of defeating coverage. Smith burnt his opponent on 55.7 per cent of his 115 targets. Of receivers to be targeted more than 100 times, only seven had a lower percentage.

Tight end Dallas Goedert was Hurts' most reliable passing game option last year, posting a 77.3 per cent burn rate from 88 targets that was the highest of any player in the position to be targeted on at least 80 occasions.

Yet Hurts was at his most dangerous on the ground in 2021, his 80 carries the most of any quarterback. Sixty of those came on scrambles – a tally only bettered by Patrick Mahomes – with Josh Allen (7.48) and Mahomes (6.27) the only signal-callers with at least 100 attempts and 50 scrambles to average more yards per carry on such runs.

His 29 explosive runs of 10 yards or more were the fourth-most in the NFL and nine more than Eagles running back Miles Sanders, who was second among running backs with at least 100 carries with a yards before contact average of 3.65. Sanders, despite failing to find the endzone in 2021, was also fourth in the league in yards per carry on runs that were disrupted by a defender, putting up 4.17 per attempt.

Playing behind an offensive line that ranked fifth in pass protection win rate and second in run block win rate last year, all the ingredients are there for Hurts to be centre stage in what could be one of the NFL's most dynamic and diverse offenses.

The Eagles will be aided by a schedule that sees them face only five teams that made the playoffs last season, but there are potential potholes on their path to contention in the NFC.

Backup tackle Andre Dillard has already suffered a fractured forearm in a blow to the depth on an O-Line featuring a veteran in Lane Johnson who has consistently dealt with injury issues.

While the Eagles acquired one of the league's more underrated coverage linebackers in Kyzir White, there remain doubts over the spine of the defense, particularly at the safety position.

On paper, the Eagles have almost everything required for a deep playoff run, but rarely are NFL seasons straightforward. A season of defensive regression or further injuries to the trenches could leave the onus firmly on Hurts to elevate those around him.

The overarching question in Philiadelphia is whether Hurts can be their franchise quarteback. Given how impressive the Eagles' roster is, it may take some adversity for the team to get a definitive answer.

Serena Williams' long and illustrious tennis career looks to have drawn to a close after the American lost to Ajla Tomljanovic at the US Open on Friday. 

Following a long piece in Vogue last month, Williams wrote of her plan to "move in a different direction" after "these next few weeks", suggesting the tournament at Flushing Meadows would be her last outing.

Thanks to her success and brilliance on the court, Williams has become synonymous with tennis and is regarded by many as the greatest the women's sport has ever seen.

At the age of 40, Williams has persisted with tennis far longer than most do, and that is testament to her quality and enduring desire for success.

Though Williams left a glimmer of a chance that she may yet play again, joking that she "always did love Australia", she may well have taken to the court for the last time. Here, Stats Perform takes a look at the key facts, stats and figures of her career; in other words, Serena's remarkable legacy.

Twenty-three… and done?

Of course, the headline fact for Williams' career is her grand slam titles count.

She has won 23, which is more than anyone else in the Open era.

But she still had one target left: matching Margaret Court. The Australian's 24 grand slam successes include nine won before the Open era began in 1968, though her overall total has been the benchmark ever since she claimed her final crown at the US Open in 1975.

Clearly, victory for Williams at Flushing Meadows would have been the perfect farewell, but it was not to be. Will that near-miss encourage her to take one more shot in Court's homeland next year?

The finals hurdle

Had Williams managed to reach the championship match in Queens, she would have equalled another record.

She headed into the US Open having played in 33 grand slam finals, one more than Martina Navratilova.

But Chris Evert (34) sits out in front, and that record is now set to remain hers for many, many years.

Top of the pile

It's been a while now since Williams was last the highest-ranked player in the world, but in a way that only further highlights how remarkable her career has been.

She's spent 319 weeks ranked as world number one, which is behind only Steffi Graf (377) and Navratilova (332).

While many might have expected Williams to have been top of the pile for even longer, it's worth remembering how she's spent time out due to injuries and pregnancy, with her general involvement in top-level tennis decreasing after 2014 when she played 16 tournaments – in 2016 that halved to eight, and during no year since has she played in more.

Additionally, some will also be surprised to learn she actually only finished the year as the top-ranked female player five times. Nevertheless, that's still third to only Graf (eight) and Navratilova (seven).

Go hard or go home

Such has been Williams' quality, she was always considered a threat regardless of the surface – she's won each grand slam at least three times.

But there's no denying she was at her most lethal on hard courts.

She has won 48 WTA Tour-level titles on hard courts, which is 11 more than anyone else (Graf) in the Open era.

Those 48 come from a grand total of 73 across all surfaces, leaving her ranked fifth behind Navratilova (167), Evert (157), Graf (107) and Court (92).

Surface to say…

Williams' comfort on hard courts goes even further than that.

She's won 541 matches on the surface, making her one of just two female players to surpass 500 victories on one specific ground type.

Navratilova (600 on carpet) is the only other player to achieve the feat, with Serena's sister Venus (498 on hard) the closest to the 23-time grand slam champion.

The grass is greener

Despite that unrivalled excellence, hard courts may not be the surface many feel to be most synonymous with Williams, however.

Wimbledon is the tournament that would appear to be her favourite.

She's reached the final at SW19 11 times. Only Navratilova can better that record for the most finals at one tournament – though it's worth saying she contested the WTA Finals and Chicago 14 times each, Eastbourne 13 times and 12 at Wimbledon.

Serena Williams' long and illustrious tennis career looks to have drawn to a close after the American lost to Ajla Tomljanovic at the US Open on Friday. 

Following a long piece in Vogue last month, Williams wrote of her plan to "move in a different direction" after "these next few weeks", suggesting the tournament at Flushing Meadows would be her last outing.

Thanks to her success and brilliance on the court, Williams has become synonymous with tennis and is regarded by many as the greatest the women's sport has ever seen.

At the age of 40, Williams has persisted with tennis far longer than most do, and that is testament to her quality and enduring desire for success.

Though Williams left a glimmer of a chance that she may yet play again, joking that she "always did love Australia", she may well have taken to the court for the last time. Here, Stats Perform takes a look at the key facts, stats and figures of her career; in other words, Serena's remarkable legacy.

Twenty-three… and done?

Of course, the headline fact for Williams' career is her grand slam titles count.

She has won 23, which is more than anyone else in the Open era.

But she still had one target left: matching Margaret Court. The Australian's 24 grand slam successes include nine won before the Open era began in 1968, though her overall total has been the benchmark ever since she claimed her final crown at the US Open in 1975.

Clearly, victory for Williams at Flushing Meadows would have been the perfect farewell, but it was not to be. Will that near-miss encourage her to take one more shot in Court's homeland next year?

The finals hurdle

Had Williams managed to reach the championship match in Queens, she would have equalled another record.

She headed into the US Open having played in 33 grand slam finals, one more than Martina Navratilova.

But Chris Evert (34) sits out in front, and that record is now set to remain hers for many, many years.

Top of the pile

It's been a while now since Williams was last the highest-ranked player in the world, but in a way that only further highlights how remarkable her career has been.

She's spent 319 weeks ranked as world number one, which is behind only Steffi Graf (377) and Navratilova (332).

While many might have expected Williams to have been top of the pile for even longer, it's worth remembering how she's spent time out due to injuries and pregnancy, with her general involvement in top-level tennis decreasing after 2014 when she played 16 tournaments – in 2016 that halved to eight, and during no year since has she played in more.

Additionally, some will also be surprised to learn she actually only finished the year as the top-ranked female player five times. Nevertheless, that's still third to only Graf (eight) and Navratilova (seven).

Go hard or go home

Such has been Williams' quality, she was always considered a threat regardless of the surface – she's won each grand slam at least three times.

But there's no denying she was at her most lethal on hard courts.

She has won 48 WTA Tour-level titles on hard courts, which is 11 more than anyone else (Graf) in the Open era.

Those 48 come from a grand total of 73 across all surfaces, leaving her ranked fifth behind Navratilova (167), Evert (157), Graf (107) and Court (92).

Surface to say…

Williams' comfort on hard courts goes even further than that.

She's won 541 matches on the surface, making her one of just two female players to surpass 500 victories on one specific ground type.

Navratilova (600 on carpet) is the only other player to achieve the feat, with Serena's sister Venus (498 on hard) the closest to the 23-time grand slam champion.

The grass is greener

Despite that unrivalled excellence, hard courts may not be the surface many feel to be most synonymous with Williams, however.

Wimbledon is the tournament that would appear to be her favourite.

She's reached the final at SW19 11 times. Only Navratilova can better that record for the most finals at one tournament – though it's worth saying she contested the WTA Finals and Chicago 14 times each, Eastbourne 13 times and 12 at Wimbledon.

The AFC West has been dominated by the Kansas City Chiefs in recent seasons, with six division titles in succession.

In fact, if the Chiefs can extend that streak to seven, they will tie each of the Denver Broncos, the Las Vegas Raiders and the Los Angeles Chargers on 15 division titles.

Unfortunately for those in Kansas City, their rivals appear especially determined to ensure this year is different.

No division has prompted as much intrigue during the offseason as the AFC West, which has appeared at the centre of numerous big trades as its pretenders attempt to become contenders.

So hard to split is the division that Stats Perform has not even attempted to try – instead explaining what needs to happen for each of these teams in turn to be successful...

Kansas City Chiefs

After topping the AFC West in six straight seasons, there are plenty of reasons to believe the Chiefs can be toppled in 2022: Patrick Mahomes is coming off perhaps the worst season of his career, Tyreek Hill is gone, and the competition in the division is intense.

Yet those are also three reasons why Mahomes will be determined to lead the Chiefs to another strong year.

One of the game's leading lights will hope the 2021 season, with its 3-4 start and hugely disappointing finish in the AFC Championship Game, does not live long in the memory, but his attempts to move on swiftly could easily be hampered by the departure of WR1 Hill to the Miami Dolphins.

However, tight end Travis Kelce – the career leader in Mahomes targets (540), completions (383) and passing yards (4,960) – remains in Kansas City, and the quarterback has the ability to make a partnership work with any receiver.

Mahomes just needs time, and that is what he can expect to get behind one of the best offensive lines in the game.

The Chiefs rebuilt their O-line last year, and they ranked third in the NFL in pass protection win percentage (80.16) in 2021. Crucially, that unit improved as the season went on; the six games in which Mahomes faced the most pressures were all before the Week 12 bye.

Mahomes' pass completion rate of 77.4 per cent when not pressured ranked second among QBs with 100 or more attempts last season; this dropped to 56.7 per cent when pressured – only marginally above the league average in such scenarios (56.6).

Widely considered the most talented passer of his generation, the Chiefs have focused on protecting Mahomes rather than worrying about who he is throwing to, and that should be a safe bet despite his postseason wobble.

Las Vegas Raiders

As one elite receiver leaves the AFC West in Hill, another arrives. Davante Adams has quit the Green Bay Packers to bring his star power to Vegas.

Since his rookie season, Adams ranks fifth in the NFL for catches (669), sixth for receiving yards (8,121) and second for receiving touchdowns (73), although he has spent his entire career playing with four-time MVP Aaron Rodgers.

Now, Adams will be paired with zero-time MVP Derek Carr, who threw for 23 TDs and 14 interceptions last year, ranking 24th in touchdown percentage (3.7). Rodgers, by comparison, threw for 37 scores and four picks, with his 7.0 TD percentage the best in the league.

Yet Carr will surely benefit from having Adams to throw to. He saw 25 passes dropped in 2021 – tied for the third-most in the NFL – and a solid completion percentage of 68.4 could have been better, as his expected completion percentage of 74.5 trailed only Mahomes (75.9).

Carr is clearly an accurate passer; he just needs a little help turning this talent into tangible rewards.

Adams is the ideal man to do that, with the duo teaming up previously for two years at Fresno State, in which time the receiver's 38 TDs led the FBS by some distance.

Last year, Adams – who dropped a career-low one pass, just 0.6 per cent of his targets – added 633 yards after the catch, fourth-most in the league, and led the way in recording a first down with 49.7 per cent of his targets.

He can have a transformative impact on a team who were already the Chiefs' nearest challengers in this division and will now be overseen by former New England Patriots offensive coordinator Josh McDaniels as coach.

Los Angeles Chargers

This division is so exciting not only because it contains four potentially great teams but because it contains four potentially great offenses.

For the Chargers, there are few doubts on that side of the ball. They have largely brought back the same offense that made Justin Herbert a star in 2021 with just the 14th 5,000-yard passing season in league history. Of course, the 17-game season helped in that regard, but only Tom Brady (5,316) outperformed Herbert (5,014) on the year.

As a result, the Chargers were fourth in the league in yards per game (390.2) and fifth in total points scored (747).

So, why did they miss out on the postseason?

Well, the Chargers had a bottom-10 defense in terms of yards per game (360.1), and only two teams allowed more points across the season (459). That Herbert-powered offense ranked 23rd in time spent on the field, with the defense giving them too much to do in too little time.

There are reasons to believe that will change this year, though, with the acquisitions of Khalil Mack and J.C. Jackson particularly notable for a team that ranked in the bottom half of the league for takeaways (21).

Only three players have had eight or more interceptions in a single season over the past two years; Jackson, one of those three, has done it twice.

No player has ever previously had eight or more picks in three straight seasons, but Jackson has shown no signs of slowing and could be exactly the type of superstar the Chargers need on defense to complement Herbert's efforts on offense and seize control of this division.

Denver Broncos

These might not be the four most talented quarterbacks in the NFL, but they may well be the four most motivated.

Russell Wilson undoubtedly has a point to prove after ending a 10-year stint with the Seattle Seahawks that went downhill fast in its final 18 months. In early MVP contention after a 5-0 start to the 2020 season, Wilson went 13-12 over the rest of his Seahawks career.

He last year missed the postseason for only the second time and, according to Seattle, pushed for a trade. "I didn't initiate it," was Wilson's reply. "It was definitely mutual."

Regardless, Wilson will find a very receptive audience in Denver, where Broncos fans were desperate to see an end to the QB merry-go-round that had them in a spin for six straight years after Peyton Manning's farewell Super Bowl 50 win. They have had 10 different starters under center since 2016, second only to Washington (11).

In that time outside the title picture, though, the Broncos have rebuilt the rest of the roster, waiting for the sort of QB-coach combo they now have in Wilson and former Packers OC Nathaniel Hackett.

Denver allowed the eighth-fewest yards per game last season (326.1) and the third-fewest points (322); on offense, a better QB than Teddy Bridgewater would have made more use of playing behind an O-line that ranked eighth in pass protection win percentage (78.64).

With personnel changes at the two most important positions, the Broncos can expect to be much, much better than 19th for yards per game (330.5) and joint-23rd for total points (335).

That improvement should take the Broncos from nowhere to somewhere, even in this AFC West.

If there is one thing football fans will simply never be calm about, it is the amount of money their club spends on transfers.

No matter how many new, shiny players their team signs, that brief release of endorphins they get from watching YouTube compilations, checking Twitter for updates and finally seeing some over-produced nonsense of a reveal video soon dissipates and it's on to the next one.

Having said that, you wonder what it must have been like to be a Nottingham Forest fan during the transfer window, which finally closed on Thursday.

Back in the Premier League for the first time since 1999, Forest are determined to cement their place in the top tier.

Whatever anyone thinks about the quality of the arrivals, the club absolutely went for quantity as an incredible 21 players came through the door at the City Ground at a total cost – according to Transfermarkt – of £145.76m. Only Chelsea (£251.09m), Manchester United (£214.22m) and West Ham (£163.80m) spent more in the Premier League.

At the other end of the scale, the spending of the team that finished two places above Forest in the Championship last season, Bournemouth, has been comparatively meagre.

The Cherries committed just £24.21m to incomings, with three of their six new arrivals in the window coming in on free transfers, and one a loan.

Head coach Scott Parker was sacked on Tuesday after making his feelings known on the lack of investment from above after his team's 9-0 humbling at Liverpool.

But which approach is likelier to pay off in the long run? You would think Forest's launching of money at anything and everything will give them a better chance of staying up, and possibly even challenging higher up the table in future, but football is rarely that simple.

Using fees from Transfermarkt, Stats Perform has taken a look at the past 10 years of spending from the Premier League's promoted clubs to see how those who splashed the cash in their first season back in the big time fared.

Forest have, unsurprisingly, spent more than any promoted team in Premier League history.

The only club to have come close was Aston Villa in 2019-20, forking out £143.55m after they got themselves back into the top flight.

While it worked as they avoided relegation, they did so by the skin of their teeth, with the final-day draw at West Ham keeping them safe by a single point.

Their survival was largely down to the brilliance of Jack Grealish, who was already there, though some of their signings that season remain at the club - such as Tyrone Mings, Ezri Konsa, Douglas Luiz and Marvelous Nakamba.

There have only been two other clubs to spend more than £100m in their first season back in the English top flight and both came in the 2018-19 campaign, with very different results.

Wolves' outlay of £101.48m saw them challenging for the European spots, finishing seventh with 16 wins and 57 points, ahead of Everton, Leicester City and West Ham.

Fulham, on the other hand, spent slightly more (£104.85m), but it did them no good at all as they finished 19th and went straight back down to the Championship, leaving them lumbered with a lot of expensive players with big contracts.

They have managed to recover since, and invested £55.26m after promotion last season, but it was proof if it were needed that big spending is not even a guarantee of survival, let alone success.

There have been just five clubs that have spent less than Bournemouth in preparation to make the jump from the second tier to the Premier League since the start of the 2012-13 season.

Two of them came in that campaign, and as above, with mixed results. Reading spent just £9.74m and unsurprisingly went back down, while West Ham forked out £21.51m on new recruits and finished 10th, and have remained in the Premier League ever since.

The same thing happened in 2014-15 as Burnley's spend of £11.36m was not enough to keep them up, while Leicester's outlay of £20.57m is the least any promoted team has spent without going back down in the past decade. A year later, they won the league.

The least any promoted team has ever spent was fairly recently, with Norwich City deciding they would try and mix it among the best in the land in 2019-20 with an outlay of just £7.93m. It did not work.

Those stories do not really allow us to draw any conclusions though, given the vastly differing fortunes between clubs who appeared to follow similar volumes of spending.

That rings true throughout the past 10 years, with some interesting outcomes along the way.

In the 2013-14 season, Cardiff City (£41.23m) spent more money than both fellow promoted sides, Hull City (£27.99m) and Crystal Palace (£29.70m), but were the only one of the three to go back down.

The 2017-18 campaign is the only one in the past decade that has seen all three promoted sides stay up, with each of them spending between £40-60m (Newcastle United - £41.85m, Huddersfield Town - £51.08m, Brighton and Hove Albion - £59.85m).

In the 2020-21 campaign, only high-spending Leeds United (£96.12m) stayed up of the promoted teams, with West Brom (£37.93m) and Fulham (£33.53m) going back down.

However, last season, only low-spending Brentford (£33.03m) stayed up, with Watford (£39.15m) and Norwich (£57.20m) going back down.

Across the past 10 seasons, the team that spent the most out of the three newly promoted sides has ended up being relegated in five of them, while in seven of the past 10 seasons, the team that spent the least of them has been relegated.

So, what can we gleam from all this?

Essentially, spending money does appear to provide a slight upper hand. Those who have spent more have given themselves a better chance of staying up, but arguably not by the extent you would expect, or even to the extent that makes doing so worthwhile.

Those who choose to be more frugal seem to pay for it eventually, apart from those who already had a strong squad or structure anyway, such as West Ham in 2012-13.

As is the case throughout the game, spending money will only work if it is done with intelligence and the players purchased are utilised efficiently.

Forest will be hoping Steve Cooper can continue to control the wheel as ably as he did in the Championship, but for whoever takes over at Bournemouth, this season might be like getting ahead of Formula One cars in a Ford Focus.

As the old adage goes, form is temporary, class is permanent.

It can happen to the best. Harry Kane, for example, scored just once in his first 13 Premier League games for Tottenham last season, before netting 16 in his next 24 outings once he had his mojo back.

Going under the radar slightly given their results did not particularly suffer as they hunted down an unprecedented quadruple, but opposite to Kane, Mohamed Salah's outstanding goalscoring form in the first half of the season for Liverpool regressed after the turn of the year.

Salah scored 20 non-penalty goals in 26 games in all competitions before heading to the Africa Cup of Nations, where his Egypt team suffered an agonising defeat on penalties to Sadio Mane's Senegal in the final.

On his return, Salah scored just five non-penalty goals in 25 outings. The assumption was that the 30-year-old needed a break, and he began the new campaign with a penalty against Manchester City in the 3-1 Community Shield victory and scored the equaliser at Fulham in an opening day 2-2 draw.

However, he has failed to score in three home games against Crystal Palace, Bournemouth and Newcastle United, with his only other goal so far being a consolation in the 2-1 defeat at Manchester United.

That is not to say Salah is necessarily out of form (three goals in six outings is hardly bad so early in the season) but when he has set such high standards, seeing Liverpool have to so often rely on goals from elsewhere just feels a bit... strange.

Ahead of the Merseyside derby on Saturday, Stats Perform has taken a look at why Salah might not be producing the numbers we so often associate with him in front of goal. And in fact, playing against Everton at Goodison Park could be just the tonic.

Three of Salah's four Premier League goals for Liverpool against Everton have come at the home of the Toffees, with only Michael Owen (four) having scored more away goals for the Reds against their local rivals in the competition.

Salah's next goal in the Premier League will see him overtake Steven Gerrard's haul of 120 for the club.

It is frankly remarkable the goal has not already arrived, with Salah somehow unable to score in Liverpool's win against Bournemouth last weekend, even though almost everyone else did as Jurgen Klopp's men ran out 9-0 victors at Anfield.

He had chances, incredibly missing from close range after excellent build-up down the left in the first half, before controlling a lofted Fabinho pass in the second and firing over the bar.

In the much more difficult 2-1 win against Newcastle on Wednesday, Salah was relatively anonymous in front of goal, having just two shots, with neither on target.

Is this bad form though, or is Salah just being asked to fill a different role by Klopp?

The sale of Mane to Bayern Munich always felt like it was going to have a significant impact, with the Senegalese attacker such a vital part of their forward line in recent years.

Luis Diaz's January arrival looked to be setting the table for the next evolution of the attack, with Mane playing down the middle after the Colombia international came in, but the signing of striker Darwin Nunez at the end of the season seemed to signal a slightly more drastic change.

What would it mean for Salah? Well, so far it appears to have had an impact on his role, even with Nunez missing for the last three games through suspension after getting sent off on his home debut against Palace.

Last season, Salah averaged 56 touches per 90 minutes in the Premier League. So far this season he has averaged just 48, seemingly indicating fewer moves are going through him.

More noticeably, although the season is still very young, he is taking fewer shots than usual. Last season he was taking 4.5 shots per 90 in the league, which so far this campaign is down to just 2.8.

You might think that could be due to being more selective in his shots, but that also does not appear to be the case, with his shooting accuracy down at 33.3 per cent from 59.4 last season.

It is not all numbers going down though, as Salah appears to be on a mission to act as chief creator, having already crafted 21 chances from open play for team-mates in his five Premier League games, already more than a third as many as the 62 he created in 35 league games last campaign.

He made eight key passes in the draw with Palace, four at United and six against Newcastle, more than any other Liverpool player in each game, suggesting Salah is preparing himself for life alongside Nunez, who gobbled up chances at Benfica last season.

The 23-year-old had a shooting accuracy percentage of 62.3 per cent in the Primeira Liga in 2021-22, and a shot conversion rate of 30.6 per cent, compared to Salah's conversion rate of 22.8 per cent in a season in which he still scored 23 Premier League goals.

This could mean that, while not exactly reverting back to being the winger he was at Roma when playing with Edin Dzeko, Salah's job in the team may be evolving from main goal-getter to someone who can either score or create in equal measure, making Liverpool a little less predictable.

In his final season with Roma in 2016-17 before moving to Merseyside, he averaged 2.9 shots per game and created 2.5 chances from open play, not entirely dissimilar to the numbers he has put up in the early stages of the new season.

The plan with the presence of Nunez is presumably to cause one of two things, either lead to the Uruguayan making use of the space left by defenders all rushing to stop Salah, or allow the Egyptian more room than usual as opposition players are forced to keep an eye on his new team-mate.

You will never extinguish Salah's thirst for goals. Breaking scoring records is what he lives for, but as he said recently in an interview with Sky Sports: "I never say before the season [my individual goals]. But the collective one is the Premier League and Champions League. It has to be. That was my target last season and I go again until I win both again."

Whatever it takes to win more silverware at Liverpool, Salah will do it, and don't be surprised if that starts with a return to form against winless Everton.

After all, class is permanent.

When we talk about footballers "returning to haunt" their former employers, conversation generally focuses on strikers – or, at the very least players who score against their old teams.

But Jules Kounde just needs to be present for there to be a degree of longing or jealousy in the air at the Ramon Sanchez-Pizjuan on Saturday, as Sevilla host Barcelona.

The France defender actually left Sevilla on good terms, with the club – and most fans – fully aware they had enjoyed a player of such quality for far longer than they'd ordinarily expect to, particularly when you consider Los Nervionenses' reputation as the selling club to end all selling clubs.

The only real gripe among Sevilla fans was the fee, with the initial €50million – plus €12.5m in add-ons – somewhat on the low side when you consider the other fees changing hands this year. Nevertheless, it was a club-record sale.

Over his three years in Seville, Kounde developed into one of the world's most-promising centre-backs, one capable of getting fans out of their seats, even.

Having finally been registered to play in LaLiga ahead of last weekend's 3-0 win over Real Valladolid, Kounde's second game with Barca sees him return to familiar surroundings – "too soon," some sheepish Sevilla fans will be saying.

Reminder of what Sevilla had

As good as Kounde was for Sevilla, it must be remembered he was very much one half of a partnership. He and Diego Carlos will probably be regarded by many supporters as the best centre-backs in the club's history – they just so happened to arrive and depart at roughly the same time.

Over the three seasons Sevilla had Kounde and Diego Carlos as their first-choice centre-backs, their defensive record was among the best in Europe.

Only Manchester City (57) and Real Madrid (52) kept more clean sheets than Sevilla (51) among teams in the top five leagues. Similarly, just five teams conceded fewer league goals (excluding own goals) than their 94 – including Paris Saint-Germain (85) and Lille (91), who each played at least 10 games less – and their expected goals against (xGA – 115.7) was the seventh lowest. Again, three of the clubs above them played 10 or more games less.

What makes this even more remarkable is that over the previous three seasons, Sevilla's 152 goals conceded saw them rank 51st out of the 74 teams to play at least 102 top-flight games over that period.

Julen Lopetegui's pragmatic, possession-based system undoubtedly helped, and there was a particular subtlety to it that allowed Kounde to really show his strengths.

Fernando, their defensive midfielder, plays deep enough to almost act as a third centre-back at times, and that gave Kounde the opportunities to move forward with the ball, safe in the knowledge he had cover in behind him.

As a defensive triumvirate, there was very little they lacked. Fernando offered protection and positional sense; Diego Carlos possessed great strength and composure on the ball; Kounde provided athleticism, drive and excellent distribution.

With Diego Carlos moving to Aston Villa in June, Fernando is the only one remaining. Sevilla's efforts to replace them had Monchi – presumably as a coincidence – going with another Brazilian-French combination in Marcao and Tanguy Nianzou, but the former is yet to play through injury and the latter has looked shaky alongside the unimpressive Karim Rekik.

In the early weeks of this season, the absence of Kounde and Diego Carlos has been glaring because their excellence at the back helped mask Sevilla's deficiencies going forward in the past. Over the previous three seasons, their 145 goals scored saw them rank 33rd among teams in the top five leagues, but they failed to really address that in pre-season and have begun the campaign with three defeats in four games.

Few would be surprised if Barca pile on the misery.

The archetypal Barcelona centre-back?

Few teams compare to Barcelona when it comes to appreciation of possession, so making the transition to a side that expects to control every single match can be a challenge.

But, theoretically, Kounde couldn't have had better preparation for such an environment. Over his three years in Spain, Sevilla were second in LaLiga for average share of possession at 59.7 per cent, with Barca (65.8 per cent) the only team seeing more of the ball.

The main difference at Barca is likely to be that Kounde is expected to distribute more than before, and that should occur naturally given the Blaugrana's even greater hold on possession.

But Kounde's admirers will hope that doesn't take away from his biggest strength.

Kounde is a defender who likes to progress the ball by carrying it. That's not to say he is a poor passer – he's very good – he just happens to be extremely adept when on the ball.

Across the top five European leagues last season, Kounde's total carry progress of 3,720 metres upfield was the 13th highest among centre-backs. But for the average distance of progressive carries, he ranked as high as seventh (minimum 1,000 minutes played).

These weren't just carries that progressed play by a couple of metres, either. His 159 progressive carries over 10 metres was the ninth most among the same players, while only three centre-backs recorded more carries with take-ones than Kounde's 19.

Put simply, this is a centre-back who likes to get his team on the front foot by taking initiative. He's positive, brave and effective. Considering Ronald Araujo's more pragmatic approach on the ball, Kounde should have the space and support to become a significant influence.

One of the best examples of Kounde's forward-thinking mentality actually came against Barcelona in the Copa del Rey last year, as he embarked on a brilliant solo run that culminated in a wonderful finish.

Kounde was the last of Xavi's major recruits this window, but considering defence was probably the area of the squad that needed strengthening the most, he was arguably the most crucial of the new arrivals.

As he prepares to return to the place where he made his name, Kounde has the perfect opportunity to truly announce himself to Barcelona fans.

With matchday six just around the corner, fresh off the first midweek Premier League fixtures of the season, now is when things can start to get tricky.

Some regular starters will likely be rested, and some new faces could emerge and force their way into the calculations going forward.

In a sink-or-swim week, it will be important to focus on players considered too important to their respective side to leave out – but who are those players?

Using Opta data, Stats Perform is here to help, with four suggestions of players that are in form that is impossible to ignore.

David Raya (Brentford v Leeds United)

Brentford's David Raya produced one of the more unlikely goalkeeping performances of the season in his side's 4-0 win over Manchester United – although maybe it should not have been unexpected.

The Spain international has only the one clean sheet to his name this season, but he ranks second in saves-per-90-minutes, and since the start of last season, he ranks second in save percentage.

Only Jose Sa (75.7 save percentage) has a higher save percentage than Raya's 74.2, and only Dean Henderson (five saves per 90 minutes) stops more shots per game this campaign than Raya's 4.4.

Joao Cancelo (Manchester City v Aston Villa)

Manchester City's Portuguese full-back has established himself as one of the most reliable fantasy picks as a crucial part of one of the Premier League's best defences, while also proving to be a consistent source of goals.

Since the start of the 2021-22 season, Cancelo ranks fourth out of all defenders for goal involvements with two goals and seven assists, while only Virgil van Dijk (22) is credited with more clean sheets than Cancelo's 21.

He gets a friendly matchup against Aston Villa as well, who this season have scored four goals and conceded nine from their five matches, placing them in the bottom-five in both categories.

Bukayo Saka (Arsenal v Manchester United)

Arsenal are enjoying their best start to a Premier League season since 2003-04, with five wins from five matches, and 20-year-old winger Bukayo Saka is a big reason they are such a threat going forward.

Among Arsenal players, Saka ranks second in both assists (two) and chances created (10) – and it is no product of a small sample size.

Since the beginning of last season, only Kevin de Bruyne (102), Mohamed Salah (84) and Son Heung-min (80) have created more chances than Saka (78) – with a gap back to Mason Mount in fifth (66).

Aleksandar Mitrovic (Fulham v Tottenham)

It should never be a surprise to see Aleksandar Mitrovic scoring goals, but to be going at a goal-per-game in a newly promoted side is evidence of the special talent the Serbian possesses.

Only Erling Haaland has more goals than Mitrovic's five so far, and he is tied with the Norwegian for the Premier League lead in both shots (22) and shots on target (12).

Mitrovic's hot start follows his Golden Boot win in the Championship last season, where he netted 43 goals in 44 appearances. Out of England's top four leagues, Mitrovic is 19 goals clear of any other player since the start of that campaign.

The NFL is all about evolution. The constant fight to gain a decisive advantage, in a league where those who can adapt fastest are kings, consistently leads to sweeping changes every offseason.

While it is the raft of head coaching changes that dominate the headlines when the regular season gives way to 'Black Monday', it is the more granular alterations to a team's approach that can often have the greatest influence on a franchise's fortunes in a given season.

Switches in scheme or a diversion away from a team's long-standing tendencies are regularly brought on by the arrival of a new coaching staff or a change in coordinator, but personnel moves also frequently dictate the approach coaches settle on as they plot a path towards success.

Schematic decisions that may not cause much of a league-wide stir can end up having a huge influence on the outcome of a season, and there are no shortage of such changes that figure to have a significant bearing on the race for the playoffs in 2022.

Here, with the help of its advanced data, Stats Perform looks at five switches in scheme or tendencies that could play a defining role in the coming campaign.

Can McDaniel transform Tua?

The Miami Dolphins' second-half surge in 2021 was tied to their reliance on the run-pass option as they tailored their offense to Tua Tagovailoa's strengths.

Not only were the Dolphins prolific in going to the RPO, they were very effective when they called them.

Miami called a RPO on 12.27 per cent of their pass attempts, the league average was 3.5 per cent. They averaged 7.25 yards per play on RPOs, comfortably above the league average of 5.85.

Given their success on those plays and Tagovailoa's comfort in executing them, RPOs will still be a part of the Miami attack in 2022.

But the usage numbers are unlikely to be as high under new head coach Mike McDaniel, who brings his take on the Kyle Shanahan offense to Miami afer serving as the San Francisco 49ers' offensive coordinator last year.

McDaniel will likely reduce the number of straight dropback pass plays for Tagovailoa. The Dolphins ran them on 34 per cent of passes last year, below the league average of 36.1 per cent but well above the 2021 49ers, who used such plays only 22.9 per cent of the time while utilising the quick game on 40.97 per cent of passes compared to 25.97 per cent for the Dolphins.

The arrival of McDaniel will likely tip the balance towards the quick game for Miami in 2022 as he looks to give Tagovailoa easy buttons in the same way Shanahan did for Jimmy Garoppolo, getting the ball into the hands of Jaylen Waddle and Tyreek Hill to do damage after the catch.

McDaniel, who was San Francisco's run-game coordinator prior to his promotion last year, will undoubtedly lean on Raheem Mostert, Chase Edmonds and a ground attack certain to be heavily based around inside and outside zone runs to take the burden off Tagovailoa and set up play-action.

Miami used play-action on 14.57 per cent of their passes in 2021, above the average of 12.7 per cent but still trailing the 49ers (15.89 per cent). With Tagovailoa's ability to hit Hill and Waddle downfield with consistent accuracy in question, look for McDaniel to put significant stress on defenses by attracting linebackers up to the line of scrimmage with play-action and then running Hill and Waddle cross-field on horizontal routes at the intermediate levels that are well within his quarterback's range.

Under Shanahan, McDaniel has had an education into scheming his weapons into space, and he should thrive at doing so when running an offense himself for the first time. Tagovailoa's challenge will be to prove he can deliver and make the most of the advantageous situations in which his coach will put him. Fail, and the Dolphins may soon be searching for a new franchise quarterback.

More deep balls and diversity for Niners

The more things change, the more they stay the same. Shanahan has insisted nothing in his playbook has changed as he enters the season with a new starting quarterback, and the 49ers head coach will unexpectedly have the same top two signal-callers as he did last season.

It is the order that has flipped, with Jimmy Garoppolo agreeing a reworked contract for 2022 to be Trey Lance's backup. Regardless of what Shanahan says, the 49ers' approach is likely to be different with Lance under center.

Lance averaged 10.10 air yards per attempt across his 10 full quarters of action last season (he started two games and played the second half when Garoppolo was injured in Week 4), the second-most among quarterbacks with at least 50 pass attempts.

On the other end of the scale, Garoppolo's 7.38 air yards per attempt were well below the league average of 7.99. Garoppolo attempted just 26 passes of 21 or more air yards the entire season, while 11 of Lance's 70 passes were of that distance.

The scheme isn't changing, but the tendencies certainly will. Lance will be more aggressive and attack downfield more often, likely leading to explosive splash plays that are not necessarily reliant on receivers creating yardage after the catch.

Though the plays may have already been in Shanahan's playbook, there is certain to be more of an emphasis on the threat of the quarterback run with Lance at the helm.

Just 2.62 per cent of the 49ers' run plays came on the zone-read last year, below the league average of 4.2. That number should increase, as should San Francisco's usage of the RPO game, which the Niners used on only 1.09 per cent of pass plays last year but averaged 8.43 yards per play when they did.

With Lance and the running back both threats to run on such plays, defenses will have to account for three possibilites when defending RPOs against the 49ers, exemplifying how much more diverse their offense can become with the 2021 third overall pick under center.

San Francisco's attack will be even more varied and more aggressive in 2022, but it is also likely to be more volatile due to Lance's inferior precision to Garoppolo on the intermediate passes that set up the yards after catch opportunities on which the 49ers have done such damage in recent years. How that volatility impacts the win-loss column will determine whether Garoppolo gets on the field at any point in the final year of his contract.

Vikings look to the 3-4

The Vikings swapped out basically everything this offseason. New general manager, new head coach – who will also be the offensive play-caller – and new defensive coordinator.

Though head coach Kevin O'Connell's offense will be different to the one run by former offensive coordinator Klint Kubiak, the systems are similar enough that Kirk Cousins and Co. are unlikely to endure too much pain in acclimating to the new scheme.

The biggest adjustments will come on the defensive side of the ball, which will be run by Ed Donatell, who spent the last three seasons coordinating Vic Fangio's defense for the Denver Broncos.

The Fangio defense has become the en vogue scheme in the NFL as acolytes such as Brandon Staley have put their spin on it and the two-high safety shells that have been a hallmark of the system have helped limit explosive plays and level the playing field a little in an offense-dominated league.

Denver played Cover 1 robber – which is where a safety from a two-high look drops down into the box to disrupt in-breaking routes in the congested area – as the defense's primary coverage in 2021. The Broncos ran Cover 1 robber 41.87 per cent of the time in a season where the league average was 14.17 per cent.

The Vikings were more varied but still used Cover 1 robber more than any other coverage, relying on it for 21.81 per cent of defensive snaps.

Whether Donatell uses that coverage to the same extent in Minnesota remains to be seen, but the transition for the Vikings' secondary may be a smooth one given how often they ultilised the same shell under Mike Zimmer. 

The most significant change to the defense comes up front, with the Vikings switching from a 4-3 to a 3-4.

Though defensive fronts are much more hybrid in the modern NFL, the tenets of the 3-4 front are the same. The three-man line is tasked with holding ground and filling up gaps at the point of attack, offering more space to the four linebackers to take better pursuit angles against the run and opening a wide menu of blitz packages against the pass. 

Minnesota's two starting outside linebackers are de-facto edge rushers and both players who should each theoretically thrive in that role. Za'Darius Smith has significant experience with the 3-4 from his time with the Baltimore Ravens and Green Bay Packers while the athletic profile of Danielle Hunter – whose 60.5 sacks since 2015 are tied for the seventh-most in the NFL – makes him an ideal candidate to excel as a stand-up pass rusher.

Possessing two impressive space-eating interior defenders in Harrison Phillips and Damon Harrison and an inside linebacker in Eric Kendricks who had five sacks last year, the Vikings have the personnel to continue to succeed rushing the passer despite the change in front. They were 10th in pass rush win rate in 2021, had the sixth-most pressures (291) and the second-most sacks (51).

Despite their joy in getting after the quarterback, the Vikings were 26th in yards per play allowed (5.66), with their struggles tied to a run defense that allowed 51 runs of at least 10 yards. Only 12 teams allowed more. If the switch to the 3-4 helps the Vikings grow more stout against the ground game, then a team with the talent on both sides of the ball to contend for the playoffs will be in a much better position to make noise as a potential Wild Card team.

The Raiders' overdue defensive switch

The Las Vegas Raiders will have a new offensive system after hiring Josh McDaniels as their head coach and will also have the benefit of expanded firepower following the blockbuster trade for All-Pro wide receiver Davante Adams. 

Las Vegas will have the personnel and the offensive scheme to go blow for blow with their high-powered rivals in the AFC West.

The question is whether their defense can do enough to contain their divisional foes, and its success in doing so likely rests on how the Raiders adapt to new defensive coordinator Patrick Graham.

In 2021, the Raiders only gave up 5.2 yards per play, the ninth-fewest in the NFL; however, former coordinator Gus Bradley's steadfast commitment to single-high Cover 3 defenses saw Las Vegas shredded for 888 net yards in a pair of defeats to Patrick Mahomes and the Kansas City Chiefs.

Las Vegas played Cover 3 zone on an incredible 65.79 per cent of snaps last season. The league average was 23.75 per cent.

In his final year as the New York Giants' defensive coordinator, Graham relied heavily on Cover 3, which the Giants used 45.58 per cent of the time. 

But Graham used a wider range of coverages more regularly than his predecessor. The Giants played Cover 1 robber, Cover 2 and Tampa 2 at a rate above the league average.

The Raiders' secondary talent is questionable, but Graham is a coordinator who predominantly plays the coverage with which they are most familiar but is more flexible than Bradley. As such, the transition to Graham should be a relatively smooth one for the Raiders' defensive backfield; however, it will be their ability to excel in a defense that promises to be much more multiple than it was a year ago that determines whether this unit improves.

Las Vegas' defense did not embrace the two-high revolution in 2021. With Graham running a unit that will be tasked with stopping three explosive downfield passers in Mahomes, Justin Herbert and Russell Wilson in the AFC West, such shells will almost certainly become a bigger part of the Raiders' gameplan. How their defenders adapt to playing those coverages more frequently will have a huge bearing on the Raiders' success in competing for top spot in a loaded division.

Will 'Big Red' turn to the run?

As the Raiders perhaps shift towards a more two-high heavy world, the Chiefs' hopes of regaining the Lombardi Trophy will in part be tied to their proficiency in attacking such defenses.

The Chiefs' often exaggerated struggles against two-high coverage shells dominated much of the discussion in the first half of last season as defenses looked for a way to take away the shot play to Tyreek Hill.

By the end of the year, the Chiefs appeared to have solved the riddle and averaged 33.2 points per game over the final six weeks of the regular season.

Yet with Hill gone, the Kansas City offense has lost the reason many opponents not named the Raiders defended them with such coverages.

Defenses are unlikely to suddenly move away from the two-high looks when playing Kansas City now Hill is a Miami Dolphin, and teams will continue to dare Mahomes to take what he is given underneath and attempt to limit his opportunities to go downfield to the deep threats the Chiefs do have, namely Marquez Valdes-Scantling and Mecole Hardman.

Mahomes will need to be patient and connect with tight end Travis Kelce and other receivers who should excel attacking the underneath areas such as Juju Smith-Schuster and rookie second-round pick Skyy Moore.

But the Chiefs may also look to run the ball more to get defenses out of those coverages and draw more defenders into the box, opening the deep areas of the field for Mahomes to attack.

Kansas City ran the ball on only 31.8 per cent of offensive snaps last season, and there is plenty of evidence to suggest they would succeed if they did so more often.

The Chiefs ranked first in run block win rate in 2021 – their exploits in that regard allowing Clyde Edwards-Helaire to average 3.08 yards before contact per attempt, the eighth-most among running backs with at least 100 attempts – and Kansas City were seventh in yards per play on the ground (4.54). Rookie undrafted free agent Isaiah Pacheco has caught the eye in training camp and could blossom into a dynamic threat out of the backfield.

It is tough to make the case for taking the ball out of Mahomes' hands. However, as defenses continue to present him with more varied and complex looks, there is a need for a greater balance in the Chiefs' offense.

Between using a first-round pick on Edwards-Helaire and building an O-line that can produce dominant run-blocking, the Chiefs have spent significant resources on players with the potential to help them achieve that balance by committing to what has been an efficient run game. A modest shift in their offensive tendencies could be the key to the Chiefs getting back to the top of the pile despite the loss of one the league's most fearsome playmakers.

It was hardly the start Rory McIlroy had envisioned.

His opening drive on Thursday at the Tour Championship careened over the boundary fence and out of bounds, eventually leading to a triple bogey. Making matters worse, a bogey followed at the second, and suddenly, McIlroy was a distant 10 strokes behind the FedEx Cup leader, Scottie Scheffler.

The gritty Northern Irishman must be a glass-half-full kind of guy, though, and McIlroy wasn't about to let the stumble dictate the direction he would take in the Playoff finale at historic East Lake Golf Club.

Indeed, he fought back on Thursday, shooting a back-nine 31 and finishing with a 67 to stay in the mix and by Sunday McIlroy had worked his way into the final group with Scheffler, albeit six shots in arrears.

The battle between the world number one and the third-ranked McIlroy for the PGA Tour's biggest prize on a sun-drenched afternoon didn’t disappoint, either. It was, as McIlroy would later say, a "spectacle", as entertaining a match as they come.

As McIlroy doggedly pushed forward on Sunday, Scheffler, a four-time winner this season, began to flounder. McIlroy tied for the lead with an improbable 31-footer at the 15th hole and took sole possession at the next when the Texan couldn't get up-and-down from a greenside bunker.

Two scrambling pars later and McIlroy became the first three-time winner of the FedEx Cup, earning $18million in the process. He closed with a 66 and finished at 21-under while Scheffler shot 73, making just one birdie all day, and tied for second with Sungjae Im.

McIlroy was nothing if not magnanimous in victory. He hugged Scheffler's parents and wife, who were standing near the scoring area, telling them their man deserved the title, too. Then he said as much on television as he was interviewed by NBC's Mike Tirico.

"What a week, what a day," McIlroy said as he gripped the gleaming silver Tiffany trophy tightly. "I feel like Scottie deserves at least half of this today. He has had an unbelievable season. I feel sort of bad that I pipped him to the post, but he's a hell of a competitor. He's an even better guy.

"It was an honor and a privilege to battle with him today, and I'm sure we'll have many more. I told him we're 1-1 in Georgia today: He got The Masters; I got this."

The dichotomy of the way he started the tournament and the way he finished was not lost on McIlroy, either. He couldn't help but remember the resiliency shown just four weeks earlier when Tom Kim started the Wyndham Championship with a quadruple bogey to fall 13 shots off the pace before going on to win.

"I guess it just shows you anything's possible, even when you're a few behind or a few in front in the tournament," McIlroy said. "Anything can happen. I'm going to remember this week mostly for that. Your mind can go one of two ways when you start like that, and automatically I thought about Tom Kim at Greensboro.

"I could have easily thought the other way and thought, I've got no chance now; what am I doing here? But I just sort of, I guess, proved that I was in a really good mindset for the week, and I didn't let it get to me too much and just stuck my head down and got to work."

The 2021-22 season was another standout one for McIlroy, whose third victory of the year brings his career total on Tour to 22. He's still looking for his fifth major championship – and first since 2014 – but the consistency of four top 10s, including second at The Masters and third at The Open Championship, has to be heartening.

McIlroy likened this season to his 2019 campaign, when he won The Players Championship and RBC Canadian Open before beating Brooks Koepka, then the top-ranked player in the world, at East Lake. And not even McIlroy's good friend Tiger Woods has won three FedEx Cup crowns.

"I played great golf. I had some good wins but didn't pick off a major, but I felt like Harry [Diamond, his caddie] said it to me on the 18th green today. He goes, all the good golf you played this year, you deserve this," McIlroy explained.

"Look, it's really cool to do something in golf that no one has ever done before. Obviously, the history of the FedEx Cup isn't as long as the history of some other tournaments, but to be walking out of here three times a champion, it's very, very satisfying and something that I'm incredibly proud of."

In some ways, and with all due respect to Scheffler, McIlroy was the perfect winner at East Lake. He and Woods were at the heart of a players-only meeting at the BMW Championship that was the catalyst for some of the sweeping changes that PGA Tour Commissioner Jay Monahan announced in Atlanta a day before the Playoff finale began.

Those changes include additional elevated events for 2023 that will feature purses of at least $20m and are designed to bring the game’s top players together 20 times a year. McIlroy is a member of the PGA Tour Policy Board and has emerged as its most ardent spokesman.

"Look, it's been a tumultuous time for the world of men's professional golf in particular,” he said. "I've been in the thick of things. I guess every chance I get, I'm trying to defend what I feel is the best place to play elite professional golf in the world.

"It's in some ways fitting that I was able to get this done today to sort of round off a year that has been very, very challenging and different."

As eye-popping as the money on offer at the Tour Championship was, as well as what will be offered at the elevated events in the future is, though, McIlroy will be the first to say it’s the competition that fuels him. Not dollar signs.

"There's a lot of cool things that come along with winning the FedEx Cup," McIlroy said. "The trophy, I have three sterling silver Calamity Jane replicas in my house, which is really cool. To think about here at East Lake and Bobby Jones, the greatest amateur player to ever play the game, the sort of history and traditions of the game of golf. He sort of exemplified all that.

"Look, the money is the money. It's great, and we are professional golfers, we play golf for a living. That is a part of it. But I think at this point in my career, the winning and the journey and the emotions and who I do it with mean more than the check."

Erling Haaland continued his incredible start to life in the Premier League with a record-setting treble in Manchester City's 6-0 thrashing of Nottingham Forest.

The Norway international made it two hat-tricks in the space of five days – and a perfect one at that, with his right foot, left foot and head – in City's latest statement victory.

Meanwhile, Liverpool left it late to see off Newcastle United 2-1 at Anfield.

There were goals and drama elsewhere on Wednesday, too, and Stats Perform unpacks the pick of the data.

Manchester City 6-0 Nottingham Forest: Haaland makes history

Haaland now has nine goals in five Premier League games since joining City from Borussia Dortmund – the best start of any player in the competition's history at this stage.

He surpassed the record of eight goals previously held by Micky Quinn and City great Sergio Aguero, the man he is effectively replacing at the Etihad Stadium.

The prolific striker is just the seventh player to score a hat-trick in back-to-back games in the competition and the first since Harry Kane did so for Tottenham in December 2017.

Fellow newbie Julian Alvarez also scored twice, while Joao Cancelo netted the other as City bagged five or more goals in a league game for the 32nd time under Pep Guardiola.

That accounts for 14 per cent of City's games under the Catalan coach in the competition, with that tally more than twice as many as any other side over that period (Liverpool, 15).

The only side to have exceeded the 18 goals City have scored after five games of a Premier League season were Manchester United, who had 21 to their name at this stage 11 years ago.

Liverpool 2-1 Newcastle United: Carvalho the late hero

Newcastle led with an hour played at Anfield, only for Roberto Firmino to level and Fabio Carvalho to fire home in the 98th minute to snatch all three points for Liverpool.

That was the 40th winning Premier League goal scored by Liverpool in the 90th minute or later – the most of any side – with three of those coming in this fixture.

Timed at 97 minutes and nine seconds, it was Liverpool's latest goal in the top flight since Dirk Kuyt's penalty against Arsenal in April 2011 (101:48).

Alexander Isak had earlier given Newcastle the lead with a debut goal, making him the sixth Swedish player to net on his Premier League bow.

Arsenal 2-1 Aston Villa: Martinelli keeps Gunners perfect

Arsenal dug deep to overcome Villa and make it five wins in a row to begin a league campaign for the first time since the 2004-05 season, when they went on to finish second.

Gabriel Jesus steered Arsenal ahead for his sixth goal involvement in his first five Premier League outings for the club, breaking Mesut Ozil's previous record of five.

Douglas Luiz equalised directly from a corner, but Arsenal hit back just 151 seconds later through Gabriel Martinelli, who converted Bukayo Saka's cross.

That was Saka's 17th Premier League assist – only Cesc Fabregas (38), Wayne Rooney (22) and Michael Owen (18) had more before turning 21.

West Ham 1-1 Tottenham: Soucek denies Spurs

Tottenham could not see out a lead at London Stadium as they were denied the chance to make their best start to a Premier League season after five games.

Thilo Kehrer turned a Harry Kane delivery into his own net, with that a league-high seventh own goal scored by West Ham since the start of the 2020-21 season.

Tomas Soucek levelled for West Ham with his 19th Premier League goal, each of those coming from inside the 18-yard box.

That strike was assisted by Michail Antonio on his 200th league appearance for West Ham, whose tally of two goals after five games is their fewest since 1994-95 (one).

While Spurs could not hold on for the win, they are unbeaten after five games in the competition for only the third time, having previously done so in 2004-05 and 2016-17.