The transfer window officially closed on Tuesday, meaning clubs across Europe must now make do with the players available to them until at least January.

It has been an eventful few months, with Lionel Messi ending his 21-year association with Barcelona by joining Paris Saint-Germain and Cristiano Ronaldo sealing an emotional return to Manchester United from Juventus.

The drama continued to unfold right through until the final stages of the window as Antoine Griezmann rejoined Atletico Madrid on an initial loan and Chelsea snapped up Saul Niguez from the Spanish champions, while Real Madrid brought in rising star Eduardo Camavinga from Rennes.

With Kylian Mbappe staying at PSG and Harry Kane still a Tottenham player, Jack Grealish's £100million switch to Manchester City from Aston Villa was the biggest deal in monetary terms, followed by Romelu Lukaku's £97.5m (€115m) move to Chelsea from Inter.

Stats Perform takes a look at the best deals that went through.

Hakan Calhanoglu: Inter to Milan (free transfer)

After failing to agree new terms at Milan, Calhanoglu completed a shock move across the city to rivals Inter, signing a three-year deal.

While not necessarily the most popular transfer, getting a player who created 98 chances last season – the most of any player in Europe's top five leagues – for free is quite something.

The Turkey international got a goal and an assist on his debut in the 4-0 win over Genoa, prompting coach Simone Inzaghi to proclaim the player "doesn't realise how good he is".

Manuel Locatelli: Sassuolo to Juventus (loan with €25m obligation)

One of Italy's most prized young assets, Locatelli secured a move to Juventus on a two-year loan that includes an obligation to buy for an initial €25m.

Among midfielders in Serie A last season, the 23-year-old made the most touches (3,304), passes (2,749) and tackles (81). He then impressed as Italy won Euro 2020, scoring twice in the group-stage win over Switzerland.

For a club looking to strengthen while saving money, this could prove a shrewd deal for Juve.

Danny Ings: Southampton to Aston Villa (£25m)

Villa appear to have invested the money they received for Grealish in shrewd fashion, signing Leon Bailey, Emiliano Buendia and striker Ings.

While the Ings deal materialised very quickly in early August, he certainly did not seem to need much time to adjust to new surroundings, scoring twice in his first three league games this season.

With 34 goals across his final two league campaigns with Southampton, there is reason to think the 29-year-old could be one of the smartest signings of the window.

Lionel Messi: Free agent to Paris Saint-Germain

The most spectacular free transfer of all time came after Barcelona had agree a new contract with Messi only to be forced to admit they could not let him sign it due to financial restrictions.

A tearful Messi bade farewell to his boyhood club before securing a move to PSG, who now boast a frankly terrifying forward line of Messi, Neymar and Mbappe.

Describing it as a 'free' transfer is somewhat misleading given the various costs involved in the different aspects of the deal, but for PSG to sign arguably the greatest player in history without paying a transfer fee is pretty amazing business.

Romelu Lukaku: Inter to Chelsea (£97.5m)

Chelsea smashed their transfer record to bring back Lukaku, whose last action in his first spell at the club was to miss a penalty in the UEFA Super Cup shoot-out loss to Bayern Munich in 2013.

Lukaku plundered 24 goals and 11 assists in 2020-21 to fire Inter to the title and claim Serie A's MVP award, after which he pushed for a return to Stamford Bridge, where he felt he had unfinished business.

It might have been a serious financial outlay, but Lukaku showed in the 2-0 win at Arsenal what a difference he could make to a Chelsea side who are extremely tough to beat but not exactly free-scoring.

Eduardo Camavinga: Rennes to Real Madrid (€30m)

Madrid may have missed out on top target Mbappe, but they managed to get a deal over the line for fellow Frenchman Camavinga, bringing an end to 18 months of speculation surrounding the young midfielder.

It is the first time Madrid have spent money on a transfer fee since 2019, when they signed Eden Hazard from Chelsea for €100m, and in Camavinga they are signing a player for the here and now rather than the future.

Since making his debut for Rennes in April 2019, no player in Ligue 1 has attempted (230) or won more tackles (139) than the three-cap France international, who will now provide competition for Casemiro, Toni Kroos, Luka Modric and Federico Valverde.

Saul Niguez: Atletico Madrid to Chelsea (loan with option to buy for £30m)

After being regularly linked with the likes of Manchester United and Liverpool in recent years, Saul will finally get a chance to play in the Premier League with Chelsea this season.

A box-to-box midfielder, the Spain international is at his best operating in a central role, though his versatility and workrate have often seen him deployed out wide by Atletico coach Diego Simeone.

He made just 22 league starts last season, his lowest figure since 2014-15. However, since August 2019, Real Madrid's Casemiro (190) is the only midfielder to have attempted more tackles than Saul (159) in LaLiga.

Antoine Griezmann: Barcelona to Atletico Madrid (loan deal with an obligation to buy)

Two years after leaving Atletico in a big-money transfer, Griezmann has returned to the Spanish capital to boost an attack that already includes Luis Suarez, Joao Felix, Angel Correa and fellow new recruit Matheus Cunha.

Griezmann's Camp Nou career never truly took off and he failed to score or create a single opportunity across Barca's first three league games this season.

But Simeone will be confident he can get the Frenchman, who scored 94 LaLiga goals in 180 appearances in his first stint at the club, operating at somewhere close to his former glory.

Cristiano Ronaldo: Juventus to Manchester United (£12.9m rising to £19.7m)

Twelve years after departing Old Trafford, Ronaldo is once again a Manchester United player after completing a surprise return to the club where he won the first of his five Ballons d'Or.

Ronaldo scored 118 goals in 292 appearances under Alex Ferguson in his first spell, 42 of those goals coming in the 2007-08 season alone, and he remains a prolific forward despite his all-round game changing with time.

The Portugal captain scored 29 league goals in his third and final season with Juventus to win the Capocannoniere, making him the first player to finish as top scorer in Serie A, LaLiga and the Premier League.

The first international break of the 2021-22 campaign has arrived, and with it comes an opportunity for many national teams to start afresh.

Following the conclusion of the Copa America, Gold Cup and Euro 2020 in quick succession, all roads now lead to the 2022 Qatar World Cup.

For a number of players, the September qualifiers provide an opportunity to make an impression, while for others it is potentially a first taste of international football. 

With the games coming thick and fast over the next week or so, Stats Perform has looked at those in contention to make their senior international debuts.

Albert Sambi Lokonga (Belgium)

Belgium's golden generation of talent missed another opportunity to turn promise into something more tangible when losing to eventual winners Italy in the Euro 2020 quarter-finals.

Roberto Martinez has decided against wholesale changes after that disappointment, with Lokonga the only outfield player in line for his first cap, having failed to get further than the bench – against Greece in June – after previous call-ups.

A product of the same Anderlecht youth system that oversaw the development of Romelu Lukaku, Youri Tielemans and Leander Dendoncker, among others, Lokonga sealed a move to Arsenal in July after impressing in the Belgian top flight.

The £15million signing has not had the best of starts to life at Arsenal, the Gunners finding themselves bottom of the English top-flight table having played at least three league matches for the first time since October 1974.

Lokonga, noted for his ability to play in front of the defence, featured in just two of those games yet still trails Granit Xhaka alone in terms of passes (113 to 139) and successful passes (97 to 118) and is behind only Sead Kolasinac for interceptions.

Claudinho (Brazil)

Citing concerns over the availability of his European-based contingent due to clubs being reluctant to release players to red-list countries, Tite has named a bloated Brazil squad for this month's triple-header of World Cup qualifiers.

Those complications appear set to deny Raphinha a debut, having impressed during his first year in the Premier League with Leeds United. 

Raphinha ranks seventh in the division for dribbles attempted since the start of last season (142), completing 42.96 per cent of those. He also ranks in the top 10 for chances created over that period with 68.

But Claudinho remains in line to be capped for the first time, called up after helping his country secure Olympic gold at Tokyo 2020.

The midfielder, whose signing at Zenit was announced not long after the Olympic tournament had concluded, described his call-up as "a dream come true".

Theo Hernandez and Moussa Diaby (France)

It is out with the old and in with the new as far as France's first post-Euros squad is concerned – to an extent, at least, with Olivier Giroud one of nine players to make way from the previous group named by Didier Deschamps.

Injuries have also played a part in that, potentially giving a quartet of uncapped players the chance to impress in the upcoming qualifiers with Bosnia-Herzegovina, Ukraine and Finland.

Hernandez, a more natural left-back option than brother Lucas, will feel his first call-up is long overdue following back-to-back campaigns as a regular for Milan, whom he joined from Real Madrid. 

Since making his Rossoneri bow in September 2019, no defender in Serie A has completed more dribbles than Hernandez (133), while only Federico Dimarco (87) and Juan Cuadrado (107) have created more chances than his 86.

Monaco midfielder Aurelien Tchouameni and Roma's Jordan Veretout may also feature during this international break, but perhaps the most exciting of the new additions is Bayer Leverkusen winger Diaby.

The Paris Saint-Germain product scored twice and assisted another in Leverkusen's opening two Bundesliga games of 2021-22, while Alphonso Davies is the only player in the division to have attempted more dribbles this term (24 to his 22).

Known for his blistering pace and ability to take on opponents, Diaby could well provide Deschamps with a different option in an attack already packed full of talent.

Otavio (Portugal)

Three new players have been called up by Fernando Santos, who is looking to the future after his Portugal side's reign as European champions came to an end in July.

Goncalo Inacio is injured, but Diogo Costa and Otavio could each make their senior debuts during this international window, with the latter the name on many lips right now.

Otavio has tallied 11 goal involvementss in each of the past two Primeira Liga campaigns for Porto and has made a fast start to the new season with two assists in his first four games.

Since the start of last season, only team-mate Mehdi Taremi has provided more assists (12) in the Portuguese top flight than Otavio's 10, coming from 51 chances created.

The Brazilian-born attacking midfielder was granted Portuguese citizenship earlier this year and will be eager to show that Brazil's loss is very much Portugal's gain should he get some minutes over the next week.

Ricardo Pepi (United States)

The dual-national drama surrounding Pepi appears to have reached a resolution as the FC Dallas forward has seemingly pledged his allegiance to the United States over Mexico.

After breaking into the Dallas side two years ago and featuring regularly last year, 2021 has been quite the season for the El Paso-born youngster.

Pepi, who does not turn 19 until next January, has 11 goals and two assists in 21 games this term and scored the decisive kick in last week's penalty shoot-out win for MLS against their Liga MX counterparts in the All-Star Game.

He has 13 MLS goals in total, the fourth-most ever by a teenager – ahead of Freddy Adu – and just nine short of the record held by Diego Fagundez.

On the basis of the past four months in particular, the USMNT could have a potentially world-class player to lead their line for a number of years to come.

Karim Adeyemi (Germany)

For the first time in 17 years, Germany will play a match without Joachim Low in their dugout either as assistant or head coach when they face Liechtenstein on Thursday.

Hansi Flick is tasked with ushering in a new generation of German talents, with help from the old guard, many of whom were key to his successful spell at Bayern Munich.

Away from regulars such as Thomas Muller, Leon Goretzka, Joshua Kimmich and Manuel Neuer, Flick has included four uncapped players in his first squad – David Raum, Nico Schlotterbeck, Florian Wirtz and Adeyemi.

A technically gifted and supremely fast winger, Adeyemi has long been considered one of Germany's most promising young players, having cost Salzburg a reported €3m when he was 16.

Adeyemi, who left Bayern six years earlier, has been given the chance to spread his wings with Salzburg and has been strongly linked with Red Bull sister club RB Leipzig.

He already has six goals in six Austrian Bundesliga appearances this term, just one less than he managed in 29 top-flight appearances last time out – a return he will be looking to build on if he is given the nod by Flick.

Justin Bijlow (Netherlands)

The Netherlands are another European heavyweight going through a transitional period of sorts after turning to veteran coach Louis van Gaal for a third stint in charge.

Frank de Boer failed to get the most out of this talented Dutch squad and already Van Gaal has put his own mark on the team by calling up a few newbies.

There will be plenty of focus on the goalkeeping position as, with Jasper Cillessen not fully fit and Maarten Stekelenburg recently retiring, Joel Drommel and Bijlow can stake a claim to be the long-term number one.

Bijlow is considered one of the finest young goalkeepers in Europe and already has 45 Eredivisie games under his belt for Feyenoord, where he is a real fan favourite.

The 23-year-old has kept 15 clean sheets across those appearances and boasts a save percentage of 72.16. Van Gaal can seemingly rely on the young stopper, as he has made just one error leading to a goal.

It was well after the final whistle on deadline day but, eventually, Antoine Griezmann's return to Atletico Madrid was officially confirmed.

Two years after leaving, Griezmann has joined on a season-long loan from Barcelona, with the deal including an option to extend for a further year and a compulsory permanent transfer clause.

Earlier this month, Barca – in a straw-clutching move following Lionel Messi's departure for Paris Saint-Germain – made a rather big deal of Griezmann making his 100th club appearance. Not even two weeks later, he is gone.

On that landmark appearance, Griezmann hit the crossbar in a 4-2 win over his former club Real Sociedad, where he had developed into one of LaLiga's brightest attackers before joining Atleti in 2014. 

He went on to score 94 LaLiga goals for Diego Simeone's team before a long-rumoured switch to Barca went through. Yet he has never quite managed to scale the same heights at Camp Nou as he did at his previous home.

A disappointing first campaign marred by injuries and inconsistency left Griezmann playing catch up last term, though he did net 20 times across all competitions to finish as Barca's second-leading scorer.

Stats Perform assesses how Griezmann's efforts last season match up to his best campaign from his previous Atleti stint, as well as looking at what he could contribute to Simeone's attack.

GRIEZMANN AT HIS PEAK

Griezmann was a model of consistency throughout his time at Atleti, as he became the perfect, versatile forward for Simeone's disciplined side.

He partnered Mario Mandzukic, Fernando Torres and Diego Costa among others during his time at the club, transforming himself from a speedy winger to a centre forward with predatory instincts in the penalty area, as well as harbouring plenty of creative talents.

Though he played more games (54) and scored more goals (32) during the 2015-16 season, Griezmann's finest campaign at Atleti arguably came in 2017-18.

His tally of 19 LaLiga strikes was 11 more than any other Atleti player as he finished sixth in the scoring charts overall.

Griezmann added another 10 goals across the cup competitions, however, including a brace in the Europa League final to help Atleti beat Marseille 3-0 in Lyon.

Only Griezmann got into double figures for Atleti in terms of assists (13), while only Koke (81) created more chances than his total of 65.

Griezmann was clinical when opportunities came his way too, converting 52.38 per cent of the 42 "big chances" (an opportunity defined as one where they player should score) that were crafted for him, while he ranked top for attempts (124) as he averaged a goal every 133 minutes.

To cap off an exceptional domestic campaign, Griezmann put in a man-of-the-match display as France beat Croatia 4-2 in the 2018 World Cup final.

PAST HIS BEST?

After making much of his call to stay put at Atleti – he took part in a mini-documentary to confirm his decision before the 2018 World Cup – Griezmann completed a €120million switch to Barca a year later.

It was not without controversy: Atleti insisted Barca had fallen some €80m short of the obligated fee, but the transfer was nevertheless upheld.

His first season at Camp Nou was one to forget, eventually ending with a humbling 8-2 Champions League defeat to Bayern Munich on home soil.

Griezmann came into his second season with a renewed sense of purpose and finally seemed to click under new boss Ronald Koeman. Playing 51 times in all competitions, including making 45 starts, he clocked up 3,904 minutes in total - the second most he has managed in a campaign since moving to Atletico.

A total of 20 goals sees him fall some way short of the 29 he managed in 2017-18, though his 12 assists come close to matching his Atleti peak.

His expected assists (xA) total of 8.99 does suggest the quality of opportunities he created was perhaps not wholly responsible for his final total. Given he was linking up with Messi, this is perhaps no surprise. It was, though, also the case in 2017-18, with Griezmann tallying an expected assists figure of 6.3, suggesting his Atleti team-mates were finishing chances they may not have been expected to.

Griezmann created more chances (67) last term than in his 2017-18 season, though his conversion rate of gilt-edged opportunities dropped to 39.39 per cent.

Only in 2018-19 (15.11) did Griezmann have a lower shot conversion rate than last term (18.02) while there was no international glory for him this time around either – he scored once as France dropped out of Euro 2020 in the last 16.

BACK WHERE HE BELONGS?

Griezmann was the main man at Atleti but had to play in the shadow of Messi at Barca, not to mention Luis Suarez before he moved on to Madrid.

Barca sold Suarez to Atleti last year and, well, the rest is history – the former Liverpool star scored 21 league goals as Atleti clinched their second title under Simeone.

Griezmann's haul of 13 goals would have put him as Atleti's second-highest scorer in LaLiga last term, four ahead of the next forward in Angel Correa, though midfielder Marcos Llorente plundered 12 in a more advanced role.

Of Atleti players, only Llorente (11), Yannick Carrasco (10) and Correa (8) provided more league assists than Griezmann's seven from 42 chances created in total.

While he has failed to score or create a single opportunity across Barca's three league games so far this season, Simeone must surely be confident he can get Griezmann operating at somewhere close to his former glory.

With city rivals Real Madrid failing to land Kylian Mbappe in the transfer window, Atleti will surely fancy their chances of reigning in Spain once again.

Novak Djokovic is a strong favourite to become only the third man to complete a calendar Grand Slam and make history at the US Open.

Djokovic has won all three majors this year and can complete a 2021 clean sweep at Flushing Meadows.

The irrepressible world number one would also go beyond Roger Federer and Rafael Nadal – both absent due to injury – with 21 grand slam singles titles if he triumphs in New York.

There will be no elusive record-equalling 24th major singles crown for Serena Williams, who has not recovered from the hamstring injury she suffered at Wimbledon.

With Ash Barty and Naomi Osaka the leading contenders to take the women's singles title, Stats Perform use Opta data to preview the final grand slam of the year.

WHAT A DIFFERENCE A YEAR MAKES FOR DOMINANT DJOKOVIC

Djokovic was thrown out of the US Open last year after accidentally hitting a line judge in the throat with a tennis ball.

The 34-year-old arrived in New York in far better spirits than when he left last September, having taken on all comers this year.

Djokovic missed out on a Golden Slam when he failed to win Olympic gold in Tokyo, but he could join Don Budge (1938) and Rod Laver (1962 and 1969) as the only men to win all four majors in the same year.

Maureen Connolly (1953), Margaret Court (970) and Steffi Graf (1988) are the only women to achieve the incredible feat.

BARTY TO GO BACK-TO-BACK?

Barty became the first Australian woman to win a Wimbledon singles title for 41 years in July.

Not since Williams in 2012 has a player claimed back-to-back women's singles major crowns in the same year, but Barty could take some stopping.

She could become the ninth woman in the Open Era to win Wimbledon and the US Open in the same season. 

Margaret Court, Billie Jean King, Chris Evert, Martina Navratilova, Steffi Graf, Martina Hingis, Venus Williams and Serena Williams can boast that achievement.

OSAKA BACK TO DEFEND TITLE

Japanese sensation Osaka won her third grand slam title at Flushing Meadows last September and went on to add a fourth at the Australian Open this year.

Osaka returns to grand slam action for the first time since withdrawing from the French Open, citing struggles with her mental health.

The world number three could be the first woman to win consecutive titles at Flushing Meadows since Serena Williams claimed three in a row from 2012 to 2014.

Osaka is the only woman to win at least one major title over the past four seasons, winning the Australian Open in 2019 and 2021, as well as the US Open in 2018 and last year.

ZVEREV BIDS TO BANISH PAINFUL MEMORIES

Alexander Zverev was beaten by Dominic Thiem in his maiden grand slam final in New York last year after the German had been two sets up.

He will not have to face Thiem this time around as the defending champion is sidelined due to injury.

Zverev was the only player to serve 100 or more aces during the tournament last year, firing down 131 but also racking up more double faults (64) than anyone else.

The world number four won his fourth title of the year in Cincinnati last week but Djokovic is undoubtedly the man to beat at Flushing Meadows.

Cristiano Ronaldo is set to be playing back at Old Trafford again in 2021-22 after Manchester United confirmed they have reached an agreement with Juventus for the transfer of the Portugal great.

While personal terms, a medical and visa are still to be sorted out for Ronaldo, it would take something remarkable to stop him from joining now after a deal reportedly worth up to €23million (£19.7m) was agreed with Juve on Friday.

For a short while it looked as though Ronaldo – who had asked to leave the Bianconeri – was heading to Manchester City after they missed out on the signing of Harry Kane.

But apparent interventions from Ronaldo's former United manager Alex Ferguson and old team-mate Rio Ferdinand may have swung the race in the Red Devils' favour.

Ole Gunnar Solskjaer seemed to open the door to Ronaldo during his news conference on Friday, and just a few hours later United confirmed a deal had been struck with Juventus.

Following confirmation of the deal, Stats Perform takes a look at greats who went back to their spiritual home, starting with the Portugal captain…

Cristiano Ronaldo – Manchester United

Ronaldo spent six years at Old Trafford during his last spell, arriving as a lanky teenager who probably averaged four stepovers per minute before leaving as a Ballon d'Or winner and an ice-cold finisher. His then-world record move to Real Madrid had been a long time coming and he spent nine years at the Santiago Bernabeu, becoming the club's all-time top scorer as he continued his transition from winger to out-and-out 'number nine'. There he won four Champions League titles before moving on to Juve, for whom he plundered 81 goals in 98 Serie A matches and picked up two Scudetti. But now he is all set for a return to England – whether he can match the standards he set last time remains to be seen, with his 31-goal haul of 2007-08 only bettered once in a 38-match season, though United fans will be convinced he can fire them to a first league title since Ferguson left.

Arjen Robben – Groningen

Robben's first retirement lasted just a single season, having announced last year he would be returning to his boyhood club Groningen for the 2020-21 campaign. Robben, now 37, initially brought an illustrious playing career to an end in July 2019 shortly after his 10-year spell with Bayern Munich finished. Although at the time he was linked with a potential return to the team that gave him his professional debut, Robben – who suffered with numerous injury problems throughout his career – opted to retire. He then caused something of a shock as he finally went back to the place where it all began, but once again injuries blighted his availability, restricting him to just seven Eredivisie appearances in 2020-21. Club director Mark-Jan Fledderus wanted him to stay on for another year, but when Robben said at the end of the season that he was going to have a long think about his future, the writing was seemingly on the wall. Another U-turn appears unlikely.

Juan Roman Riquelme – Argentinos Juniors

Perhaps more synonymous with Boca Juniors, where he made his professional debut and also spent most of his final years, Riquelme also had a strong affinity with Argentinos Juniors. He came through the club's academy in the early-to-mid 1990s, before then finishing his immense career at Estadio Diego Maradona in 2014, having also played for Barcelona, Villarreal and Argentina. Although the iconic attacking midfielder appeared close to joining Paraguay's Cerro Porteno the following year, the move never materialised.

Dirk Kuyt – Quick Boys

Kuyt briefly came out of retirement three years ago to help Quick Boys, with whom he spent 13 years as a youth. Playing in the Derde Divisie Saturday league, Kuyt was already working as assistant at the time, but made himself available for selection during a striker shortage and he made three appearances. The former Netherlands and Liverpool forward had retired the year before following a second spell with Feyenoord, where he had made his initial breakthrough in the mid-2000s, his form at the time earning a move to Anfield.

Rafael Marquez – Atlas

One of Mexico's greatest players, Marquez's longevity at such a high level was nothing short of incredible, as he accumulated 147 international caps. After breaking into the Atlas team as a teenager having come through their academy, the elegant centre-back enjoyed a sparkling career in Europe, winning 14 titles across spells with Monaco and Barcelona. Time with New York Red Bulls, Leon and Hellas Verona followed, before a final two-year stint back at the Jalisco ended in 2018. Although plagued by off-field allegations towards the end of his career, Marquez went on to become the club's sporting president, before standing down last in 2019 to focus on other areas of the sport. He was expected to be taking up a youth coaching role at Barca this season, but the deal ultimately fell through.

Henrik Larsson – Hogaborgs

While the Swedish club most may associate with Larsson is Helsingborgs, he actually made the breakthrough at a smaller side – Hogaborgs. It was here where he trained from the age of six, before eventually becoming a regular in the senior side and earning a move away. A trophy laden career followed, taking him to Feyenoord, Celtic, Barcelona and Manchester United. Although he retired in 2009, he returned to the pitch for Raa in the Swedish third tier three years later, before then finding himself back in the team at Hogaborgs in 2013, helping out due to an injury crisis despite him only previously being registered to a casual team for 'seniors'. This gave him the chance to play alongside his son, Jordan.

Carlos Tevez – Boca Juniors

The Tevez-Boca love affair has dominated most of the striker's successful and complex career. After coming through their youth ranks, the feisty forward was seen as the heir to Maradona. A brief stint in Brazil with Corinthians followed, but Europe had long since beckoned, even if West Ham was by no means the expected destination. He went on to play for Man Utd and City, increasing tension between the clubs, before then going to Juventus, but throughout this time Tevez seemed to long for a return to Boca. He went back to La Bombonera in 2015, his homecoming interrupted by a brief spell with Shanghai Shenhua in 2017 in the Chinese Super League, though even Tevez acknowledged he saw his time in China as a "holiday". "He filled Santa's sack with dollars and now he has returned to Boca," was Maradona's assessment upon 'El Apache's' return from the CSL. His third spell with Boca ended in June 2021 and it remains to be seen if he ever plays for another club.

Gianluigi Buffon – Parma

Buffon likes a comeback. Having returned for a second spell at Juventus in 2019, the goalkeeping great departed the club for a second time at the end of 2020-21. The Italy legend suggested he had not finished playing yet and Parma quickly emerged as a potential destination despite their recent relegation to Serie B. After a few weeks of contemplation, it was confirmed that Buffon was heading back to the club where he made his name. Now 43, the iconic stopper is wearing Gialloblu for the first time in 20 years, and he is set to remain with them until he turns 45, given he signed a two-year contract. What happens after that is anyone's guess but calling it a day with his first club could be a satisfyingly romantic conclusion to a remarkable career – that or he ends up at Juve again!

He is back where he belongs.
He is back home. #SupermanReturns @gianluigibuffon @Kyle_J_Krause @ParmaCalcio_en pic.twitter.com/bh2FO6P8YX

— Parma Calcio 1913 (@1913parmacalcio) June 17, 2021

It is 30 years since the great Michael Schumacher's first race in an incredible Formula One career.

The legendary German driver made his debut at the 1991 Belgian Grand Prix at Spa, a track where his son will showcase his talents this weekend.

Schumacher went on to claim his maiden F1 victory at the same circuit in 1992 and retired with a staggering 91 victories to his name, having claimed seven world titles.

To mark the anniversary of his bow in Belgium, Stats Perform picks out some of the standout numbers Schumacher racked up in an astonishing 19 F1 seasons. 

JORDAN'S LOSS IS BENETTON'S GAIN

Schumacher stepped in for his first F1 race for Jordan and impressively qualified in seventh before retiring on the first lap due to clutch problems.

He spent the rest of the season driving for Benetton, picking up four points from six races.

Schumacher won once in each of the next two seasons, then won back-to-back titles in 1994 and 1995 before making a lucrative move to Ferrari.

UNPRECEDENTED DOMINANCE

Schumacher established himself as one of the all-time greats during his decade with Ferrari, claiming his third world title in 2000.

That was the start of an unprecedented period of dominance, as he claimed a record five consecutive world titles.

Schumacher broke Juan Manuel Fangio's all-time record of being crowned world champion five times as he went from strength to strength before Fernando Alonso dethroned him in 2005.

SCALING NEW HEIGHTS TO SEVENTH HEAVEN

The 2004 season was Schumacher's most dominant as he won 13 of 18 races and was on the podium 15 times.

No driver has bettered that tally of victories for a season, but Lewis Hamilton last year matched Schumacher's haul of seven world titles.

Schumacher amassed an incredible 148 points in 2004 and that was the last time he won the championship.

RACKING UP THE RECORDS

Schumacher broke the record for F1 victories and finished with 91, a total Mercedes great Hamilton has gone on to surpass.

The 77 fastest laps set by Schumacher is a record, as is his 15 seasons with a victory and his 17 podium finishes in a season, set in 2002.

His 19 consecutive top-three finishes has never been bettered and nor has his 15 top-two finishes in a row, along with the most hat-tricks (pole, win and fastest lap) achieved by a driver with 22.

Schumacher's 181 races with Ferrari is the record for driving with the same constructor.

THRIVING IN FRANCE

The French Grand Prix was the race where Schumacher had the most victories, taking the top step of the podium eight times – another record.

He won at Magny-Cours for the first time in 1994 and his final win at the circuit came 12 years later.

Schumacher also holds the record for most poles at the same race with eight in Japan.

The 2021-22 Serie A campaign commences on Saturday following a busy close season that saw more than half of the 20 teams change head coach.

Antonio Conte departed Inter after guiding the club to their first Scudetto in more than a decade, with Simone Inzaghi being plucked from Lazio, who in turn turned to Maurizio Sarri.

Sarri's former club Juventus decided to end the Andrea Pirlo experiment after just a year and opted for a familiar face in six-time title winner Massimiliano Allegri as his replacement.

Luciano Spalletti is back in Serie A with Napoli, meanwhile, and Jose Mourinho has returned to Italy with Roma some 11 years on from his hugely successful stint with Inter.

There will be just as much focus on the dugouts as the field when the new season gets up and running this weekend, then, and some coaches are facing a tougher challenge than others.

Stats Perform looks at what the managerial changes could mean for some of Serie A's biggest clubs.

Inter 

In: Simone Inzaghi

Out: Antonio Conte

Conte will go down in Inter folklore as the man who ended the club's 11-year wait to return to the top of Italian football.

In an ideal world, one in which the Nerazzurri were not in a position whereby they had to sell star players to balance the books, Conte would still be in charge at San Siro.

As it is, though, Inzaghi will be at the helm this coming season and is in a rather unenviable position of having to pick up where Conte left off, minus the goals of Romelu Lukaku.

Inzaghi has his own vision but does not differ too much from Conte in terms of tactics, both coaches favouring a 3-5-2 formation of sorts throughout their careers.

Moving the ball forward quickly will be the aim, with Milan (90) the only side in Serie A last term to register more direct attacks than Inzaghi's former side Lazio (89). By comparison, Inter were third on that list with 80.

While the structure will remain largely the same, losing Lukaku and influential wing-back Achraf Hakimi – albeit with Edin Dzeko and Denzel Dumfries arriving – means Inzaghi will need to get more out of others if Inter are to retain their crown.

Lazio

In: Maurizio Sarri

Out: Simone Inzaghi

The man tasked with replacing Inzaghi at Lazio is Sarri, who endured mixed fortunes during his most recent two stints in Serie A with Napoli and Juventus.

Having come so close to ending Juve's stranglehold on the title in 2017-18 while at Napoli, the 62-year-old won the Europa League in his solitary season at Chelsea and was then given just 14 months at the Allianz Stadium.

His stint in Turin came to an early end despite leading Juve to top spot, his style of play – coined 'Sarriball' – deemed too distant from what Juventus typically expect from a head coach (more on that later!).

At the Stadio Olimpico, Sarri will have more freedom to put his spin on things as he looks to build or improve upon last season's sixth-placed finish. A back four, rather than the three-man defence Inzaghi favoured, can be expected.

Sarri teams are known for their verticality, meaning they like to move the ball forwards. Lazio, as already touched upon, are a good fit in that regard.

They ranked lowest in the top eight last season for build-up attacks (83), which is defined as the number of open play sequences that contain 10 or more passes and either ends in a shot or has at least one touch in the opposition box.

The big question, though, is whether Sarri has the personnel to turn Lazio into top-four regulars in the same way he did at Napoli. With Immobile taking on the Gonzalo Higuain role up top, it might just be a possibility.

Juventus

In: Massimiliano Allegri

Out: Andrea Pirlo

While a lot of clubs mentioned are entering the unknown with their managerial appointments, Juve know exactly what they are getting in Allegri.

The 54-year-old guided Juve to five straight Serie A titles and two Champions League finals between 2014 and 2019, having also previously lifted the Scudetto at Milan.

Only one coach in the Bianconeri's history, Giovanni Trapattoni, has overseen more league games than Allegri's 190, while Juve's two highest-scoring seasons dating back as far as 1930 have both come under the stewardship of the returning favourite.

This Juve side has changed since Allegri's first stint, though, and it may take him time to make this team his own again following the aforementioned reigns of Sarri and Pirlo.

Whereas Sarri and Pirlo were a little complex with their tactics and what they expected from players, Allegri will take a different approach. That is not to say Juve will not be able to chop and change things under Allegri, as they did in his previous spell.

One aspect that will surely differ from last season is the number of goals Juve score. They found the net an underwhelming 56 times from open play last season from an expected goals return (xG) of 54.3.

By comparison, champions Inter scored 65 open play goals from a near identical xG as Juve of 54.6. With the prolific Cristiano Ronaldo set to stay at the club for at least one more season, there is hope of reclaiming the title this time around.

Roma

In: Jose Mourinho

Out: Paulo Fonseca

The highest-profile of the incoming coaches in Serie A this season, Mourinho arrives with his 'Special One' status still intact in Italy thanks to his success at Inter a little over a decade ago.

Mourinho won as many league titles in two seasons at San Siro (two) as he has in the 11 years since (one), while also lifting the second of his Champions League crowns, the Coppa Italia and Supercoppa Italiana during that trophy-laden stay.

The Portuguese won 62 per cent of his matches at Inter but that win rate has steadily declined and he won just 51.2 per cent of his games with Tottenham, leaving the club in April after just 17 months in charge.

Mourinho's sides were so often hard to beat, but Spurs lost 13 times in 2020-21 under him, making it his worst ever season in that regard and he did not even see it all the way through.

But could his career take a turn in the right direction in Rome? Mourinho's tactics have remained largely consistent throughout his career, no matter the club or country he is coaching in.

The back three largely favoured by Paulo Fonseca will become a back four and there will be particular emphasis on Bryan Cristante, a typical Mourinho player in many ways, to shield the defence and get the ball forward.

The addition of Tammy Abraham from Chelsea is clearly a Mourinho signing, helping the fill the void left by Edin Dzeko, but Mou's pragmatic approach is surely a concern for a Roma side that looked better offensively than defensively last season. 

Finding the correct balance will be key, and that ultimately depends on whether Roma have hired the pre-2015 Mourinho or post.

Napoli

In: Luciano Spalletti

Out: Gennaro Gattuso

With spells at seven different Italian clubs under his belt, including two years at Inter, Spalletti certainly does not lack of experience. After two years out of the game, however, the 62-year-old has to quickly prove he is not yesterday's man.

Spalletti made clear when he took over from Gennaro Gattuso that he will look to operate with a 4-3-3, though on the basis of pre-season it may well be a more familiar 4-2-3-1 come the opening day.

He inherits a talented squad that includes the likes of Piotr Zielinski, Victor Osimhen, Dries Mertens, Hirving Lozano and Lorenzo Insigne – for now – in attack.

Napoli had no problems scoring goals last time out, with no team managing more shots from open play than their 493 and only Atalanta (77) and Inter (65) scoring more from non-set-piece situations than their 64.

Pressing is a big part of Spalletti's game and that makes Napoli a good fit as they ranked joint-second in Serie A last season for goals scored from high turnovers (nine), behind only Atalanta (10).

There are already a few rumblings of discontent behind the scenes with regards to transfer activity, but a kind fixture list ensures that Spalletti can hit the ground running in his quest to guide Napoli back into the Champions League.

Romelu Lukaku will look to inflict more pain on wounded Arsenal when he makes his second Chelsea debut on Sunday.

Lukaku is set to be unleashed on the Gunners for a Premier League return at the Emirates Stadium after completing a record £97.5million (€115m) move from Inter.

The Belgium striker played a massive part in Inter's Serie A triumph last season and is back at Stamford Bridge hunting more trophies.

While Chelsea started their Premier League season with an emphatic 3-0 win over Crystal Palace, the Gunners suffered a 2-0 derby defeat to newly promoted Brentford.

Using Opta data, Stats Perform previews the big showdown in North London, with the Blues out for revenge after Arsenal did the double over them last season.

LUKAKU CAN FIRE AGAINST GUNNERS DESPITE POOR RECORD

Lukaku is relishing the challenge of taking the Blues' supposedly cursed number nine shirt.

If his record against Arsenal is anything to go by, a debut goal may be unlikely for the prolific frontman.

The former Everton and Manchester United striker has scored only twice in 15 Premier League appearances versus with Gunners, although he returns to England seemingly at another level.

Lukaku terrorised defences in Serie A and has been consistently outstanding at international level, the Red Devils' all-time leading goalscorer netting four times in five Euro 2020 games

Brentford exposed Arsenal's defensive frailties in the first game of the season and Lukaku could cause them all sorts of problems.

WERNER COULD CASH IN

Timo Werner came in for plenty of criticism for poor finishing in his first season in England, although the Germany international's pace and intelligent movement still made him a real handful.

Thomas Tuchel said Lukaku's arrival is good news for Werner, whose 29 touches in the win over Palace was the fewest by any Chelsea outfield player.

The presence of the powerhouse Lukaku and his ability to hold the ball up can help Werner thrive this season if they are both given the nod from the start.

Werner scored only six Premier League goals last season and provided eight assists, missing 18 of what were deemed by Opta to be big chances and falling short of the 11.5 expected goals (xG) tally.

He should not be short of opportunities with Lukaku leading the line and can silence any critics in the 2021-21 campaign.

GUNNERS NEED A CUTTING EDGE

Arsenal have only been beaten in three of their past 14 meetings with Chelsea but they will have to show a marked improvement from a lacklustre display against the Bees.

Strike duo Pierre-Emerick Aubameyang and Alexandre Lacazette were absent for that loss, with the club confirming on Thursday both players had tested positive for coronavirus.

Lacazette will not face the Blues and Aubameyang is to be assessed ahead of the game.

Mikel Arteta's side played 15 Premier League games without at least one of Aubameyang or Lacazette - both linked with moves ahead of the transfer deadline - last season, winning nine, drawing four and losing two.

With the pair both in action, they won nine of 23 matches, lost 11 and drew three.

Folarin Balogun failed to hit the target with his three shots in his first Premier League start at Brentford, with Nicolas Pepe only testing David Raya once with his four attempts.

Arsenal must show more of a cutting edge if they are to get one over on their London rivals again and Chelsea will be wary of Kieran Tierney, who created six chances against the Bees.

It has been another off-season of change in Italy, but Serie A returns this week and another intriguing campaign awaits.

Inter were champions last term, ending Juventus' run of nine straight Scudetti, but they have not been able to keep their title-winning side together.

Romelu Lukaku is gone, as is coach Antonio Conte, while Massimiliano Allegri has returned to Juve to tee up another tilt.

So, what does that all mean for the coming season? Stats Perform attempts to find out.

The Stats Perform League Prediction Model, created by Stats Perform AI using Opta data, has analysed the division ahead of the new season to assign percentages to potential outcomes for each club.

The model estimates the probability of each match outcome (win, draw or loss) based on teams' attacking and defensive qualities, which considers four years' worth of results, with weighting based on recency and the quality of opposition. The season is then simulated 10,000 times to calculate the likelihood of each outcome.

Read on to see who can realistically compete with Inter and who should be looking over their shoulders...

THREE FIGHTING FOR TITLE

Inter might have lost some key men, but the model is backing a team that finished second and then first to lead the way again.

The Nerazzurri are given the best chance of taking the title (45.1 per cent), while they certainly should make the top four even without Lukaku and Conte, rated as a 94.2 per cent likelihood.

Unsurprisingly, Juve are the closest challengers to Inter's crown, with a 21.5 per cent shot.

It is not set to be a two-horse race, though, as Atalanta are the third and final team to be given a substantial chance at 19.6 per cent.

In fact, Atalanta's lowest probable finish of ninth is higher than Juve's 10th, with another exciting season expected for La Dea.

TOP FOUR SETTLED?

There is strength in depth in Serie A this season, but the model has identified a clear frontrunner for the fourth Champions League place.

Napoli, with a 9.4 per cent title chance, have a 68.6 per cent likelihood of making the top four, putting them well clear of the rest despite finishing fifth in 2020-21.

That means disappointment for big names like Milan, Lazio and Jose Mourinho's Roma.

Milan do have a 44.0 per cent shot at Champions League qualification, but that is a modest opportunity given they were second last term and led the league for half the season. A Scudetto triumph is rated at 3.6 per cent.

Lazio, under Maurizio Sarri, have a 14.9 per cent hope of a top-four place, while Mourinho clearly has work to do as rivals Roma are only given an 8.2 per cent likelihood.

Besides those sides, only Sassuolo – 1.1 per cent for the Champions League, 2.6 for the Europa League and 8.2 per cent for the Europa Conference League – are realistically also in the European picture.

STRAIGHT BACK DOWN AGAIN

The model does not make for pretty reading for the three promoted sides, who are all expected to spend only a single season in the top flight before returning to Serie B.

For Salernitana and Venezia, a particularly brutal campaign could be in store. They are highly likely to go down, rated at 95.9 per cent and 94.8 per cent respectively.

Empoli are given a slightly improved chance but are still expected to be relegated, at 79.3 per cent.

Torino's awful season, finishing 17th in 2020-21, should not be repeated, with merely a 4.3 per cent likelihood of demotion.

That still makes them sixth favourites for the drop, also behind Spezia (6.0 per cent) and Hellas Verona (5.4 per cent).

This should have been a season for Inter fans to enjoy, on the back of a title triumph and with European football returning to some semblance of normality.

Instead, they have lost coach Antonio Conte, top scorer Romelu Lukaku and standout wing-back Achraf Hakimi. Talk of a Tottenham move for Lautaro Martinez – seemingly linked to Harry Kane's future – has not been ruled out entirely.

It leaves the reigning Serie A champions picking up the pieces, with the club's dire financial situation dampening hopes of a successful title defence.

Although there have also been new arrivals, Simone Inzaghi and a 35-year-old Edin Dzeko clearly are not in the same class as Conte and Lukaku.

Inter will be slightly different this season and it is highly likely they will be slightly worse for it.

Downgrade to Dzeko

In Lukaku, Inter have sold a player in his prime coming off his best campaign to date. In Dzeko, the Nerazzurri have brought in a veteran whose Serie A career just plunged to new depths.

Lukaku netted 24 times en route to Inter's Scudetto, while Dzeko's final year with Roma brought only seven league goals.

The Bosnia-Herzegovina international did play a mere 1,825 minutes, but it was his poor form while on the pitch that saw him limited to 20 starts despite featuring in 31 matchday squads.

Dzeko's shot conversion rate of 10 per cent was higher than in two of his seasons in the capital and only margainally lower than 2017-18's 10.5 per cent when he scored 16 times. The decreasing frequency of his attempts was an issue, managing just 3.5 shots per 90 minutes, a trough to contrast to the 2016-17 peak of 5.3.

Inter's new forward fell some way short of his expected goals (xG) total of 13.3 – a failing only partially explained by the expertise of opposition goalkeepers, who prevented 3.6 Dzeko goals according to expected goals on target (xGOT) data, which analyses the quality of the shot rather than the quality of the chance.

Lukaku, on the other hand, outstripped his xG figure of 23.8, even if his attempts were only worth 22.9 xGOT.

It is not only as a scorer that Dzeko slips below Lukaku's standards either. Chelsea's latest record buy was a creative force last term, providing 11 assists. Dzeko had three.

Indeed, Lukaku crafted a team-high 52 chances – or 9.4 per cent of Inter's 552 shots across the campaign – while Dzeko laid on 29 (5.3 per cent of Roma's attempts). Dzeko was more involved in build-up play than Lukaku, averaging 49.7 open play sequences per 90 to his predecessor's 44.4, but he could not match Lukaku in terms of passing accuracy (68.8 per cent), passing accuracy in the opposition half (64.8) or passing accuracy in the final third (58.5).

Unsurprisingly, the former Giallorossi favourite also cannot play at the same pace as Lukaku. Dzeko was involved in only six fast breaks to Lukaku's league-leading 17, although he did score twice from such situations. Roma were second in the league in this regard – behind Inter.

But even if the Nerazzurri do slow slightly with Dzeko in the side, his work in moving the ball up the field is still comparable to Lukaku's. He had more carries (7.9) and progressive carries (4.5) than Lukaku last term, while operating in the same ballpark for carry distance (92.6 metres), attempted dribbles (2.9) and completed dribbles (1.3) – all numbers per 90.

The percentage of his touches Dzeko took in the opposition box (17.3) tallied closely (18.3 per cent for Lukaku), too, with the previously prolific attacker's game peculiarly now suited to work away from goal.

An aerial force

As part of his link-up play, Dzeko offers a clear focal point. His 60.4 per cent success rate in aerial duels ranked fourth among Serie A forwards with 100 or more such tussles. Lukaku won only 42.9 per cent in a category led by Zlatan Ibrahimovic (65.7 per cent). Dzeko's 52 flick-ons also put him fourth.

But Dzeko's heading ability does also give Inter a greater threat inside the penalty area. The striker was joint-third for headed attempts (20, excluding blocks), with his 1.0 per 90 double Lukaku's 0.5. As with his feet, Dzeko was wasteful in this regard, scoring only one header while new Inter colleague Martinez nodded in four goals, but a greater sample size shows the danger he can pose. Since his 2015 Serie A debut, Dzeko leads the way for headed attempts (203, excluding blocks) and his 16 goals – making up 18.8 per cent of his total of 85 – are tied for third.

Dzeko therefore looks a good fit in an Inter side who last season topped the charts in succeeding with 24.6 per cent of their open play crosses, leading to a joint-high 92 headed shots and 14 headed goals.

Whether that crossing quality is still at the club is another matter.

Inter's wings clipped

Only nine defenders in Serie A last term attempted 100 crosses, but Hakimi, marauding up the right, was one of them. Within that select group, his crossing accuracy of 23.9 per cent ranked third – just ahead of Leonardo Spinazzola, another exciting wing-back and Dzeko's former Roma team-mate (23.5 per cent).

Hakimi's departure for Paris Saint-Germain robs Inter of that quality and the 36 chances he created. There is pressure on Denzel Dumfries, a €12.5million recruit, to fill that void. He created 41 chances in the Eredivisie last season, yet only five of his 50 crosses were successful.

That ability to deliver from wide positions is merely one of Hakimi's array of attributes, too, with the €60m man carrying the ball 22.7 metres further per 90 than Dumfries while also contributing a goal or assist every 178.1 minutes, compared to the Netherlands international's 308.5 minutes.

Inter should at least have increased creativity from midfield, where free signing Hakan Calhanoglu offers an upgrade on the recuperating Christian Eriksen. Calhanoglu, playing for rivals Milan, had league highs in chances created (98) and chances created from set-pieces (50) in 2020-21. Milan led Serie A in goals from set-pieces (16, excluding penalties), but Inter ranked joint-fourth (16) and will surely now improve.

Trying to run it back

If mixed results are anticipated from direct replacements for Lukaku, Hakimi and Eriksen, those moves at least indicate some unlikely joined-up thinking in spite of the chaotic nature of this off-season. Inzaghi's appointment also suggests Inter plan to change little from last season, even with the numerous notable departures.

Like Conte and Inter, Inzaghi's Lazio consistently lined up with a 3-5-2 formation in 2020-21, with their approaches also not dissimilar.

Lazio's press was a little more aggressive, allowing 11.6 passes per defensive action to Inter's 12.8 and also engaging in more pressed sequences (543) despite having slightly more possession (52.9 per cent) than Inter (52.0 per cent). Lazio also scored eight goals from high turnovers.

However, between the replacement of a speedy Lukaku with a slower Dzeko and Inter's pre-existing preference for build-up attacks (119) over direct attacks (80), Inzaghi's playing style might have to be a little more patient this term, even if the new number nine's physical presence will give them an outlet.

These are minor tweaks, though, that should mean Inzaghi can adapt to Inter or Inter to Inzaghi.

Defending champions have rarely had it so tough when preparing for a new campaign, but Inter have done all they can to ensure a new-look side can continue to find success.

Manchester City saw their main rivals for the Premier League title get off to a flying start on Saturday before the champions stumbled at Tottenham on Sunday.

Son Heung-min continued his phenomenal recent record against City with the only goal, while Pep Guardiola's men drew a blank for a third consecutive game in all competitions. Perhaps there's someone in north London who could help them out with that?

Manchester United and European champions Chelsea revelled back in front of full houses and Liverpool gave newly-promoted Norwich City a reality check.

But those are the bare facts. Let's delve a little deeper to examine some of the quirkier happenings on the Premier League's opening weekend.

Stumbling start for City

Guardiola suggested his stars returning from Euro 2020 and Copa America duty might be undercooked and so it proved. The 1-0 loss at Tottenham Hotspur Stadium puts City in territory they are not used to.

You have to go back to 2008-09 and a 4-2 defeat at Aston Villa for the previous time City lost their opening Premier League fixture.

In that same campaign, Guardiola's fledgling Barcelona tenure got off to an inauspicious start with a reverse against Numancia that indicated little of the treble win that was about to unfold. The Catalan had overseen 11 subsequent opening day wins since then.

Perhaps it was always going to be Spurs who halted his run, Guardiola has now lost more away games against Tottenham (five) in all competitions than any other opponent in his career.

It is also worth considering whether he is chasing the wrong Spurs forward. Only Jamie Vardy (nine) has more than Son's seven goals against City since Guardiola took charge in 2016.

Lionel Messi is a Paris Saint-Germain player. Even though we've had a few days to let that sink in, it still seems such a perplexing scenario.

Messi has signed a two-year deal at the Parc des Princes and will form probably the most-feared front three in world football alongside Kylian Mbappe and his old friend Neymar.

Barcelona's dire financial situation meant they could not bring their greatest ever player back under LaLiga's salary restrictions, meaning they begin their 2021-22 campaign on Sunday against Real Sociedad with a gaping void in their team.

This will be the first season since 2003-04 that Barca haven't been able to call upon the Argentina superstar, and his absence is sure to leave a lingering sense of astonishment that won't clear for a while, particularly if the Blaugrana endure a difficult start to the campaign.

Of course, Barca's hands were ultimately tied in this shocking saga, their financial state so rocky that signing Messi up to a new contract after his previous deal expired was literally impossible. Although the two parties had an agreement, the numbers simply wouldn't work.

The world will now watch on with fascination as Messi represents a new club for the first time in his career, while back in Catalonia, Barca must carry on like nothing's happened.

That'll be difficult to do. Using Opta data, Stats Perform looks at some of the incredible feats that make Messi irreplaceable.

Messi played 778 games for Barcelona in all competitions, scoring 672 goals and providing 265 assists across those games. That amounts to 937 goal involvements during his Barca career, which began as a 17-year-old.

Previously a one-club man, his first appearance for Barcelona came under Frank Rijkaard against Espanyol in October 2004, while his first goal arrived seven months later with a clever lob against Albacete at Camp Nou from a Ronaldinho assist.

Brazil great Ronaldinho was the last Barcelona player to wear the famed number 10 before Messi took that shirt in 2008 and made it his own.

But Ronaldinho does not feature among the top assisters for Messi goals, a list that is led by Luis Suarez (47). Dani Alves assisted 42 of the attacker's goals and third is Andres Iniesta with 37, six more than fellow legendary midfielder Xavi.

Messi played under eight different coaches during his time with Barcelona. Of those, he featured most often (219 appearances) and scored the most goals (211) during Pep Guardiola's tenure.

However, the 60 goals Messi scored in 50 games under the late Tito Vilanova – an average of 1.20 goals per match – was his best goals-per-game return with a single coach.

Perhaps unsurprisingly, Messi's lowest average goals-per-game ratio was during the Rijkaard era at the start of his career (0.38), followed by the 0.63 managed under Quique Setien between January and August 2020.

Messi's most prolific season as a Barcelona player was in 2011-12 when scoring a remarkable 73 goals in all competitions and providing a further 28 assists, setting a personal record in both categories.

Indeed, the forward netted 79 goals for his club across the calendar year in 2012, which is a record amount by a single player. His next most prolific year was 2010 when registering 58 times.

In more recent years, Messi managed 51 goals in 2016, 50 goals in 2017, 47 goals in 2018, 45 goals in 2019 and 26 goals in 2020 – a steady decline that he has already rectified this year, having scored 28 times in the first half of 2021.

He is the only player to have scored 10 or more goals in 15 consecutive LaLiga seasons.

Messi's 672 goals for Barcelona were scored against 82 different teams. Sevilla were his favourite opponent, finding the net against them 38 times in 43 appearances.

Atletico Madrid were next on that particular list, with Messi bagging 32 goals in that fixture, followed by Valencia (31), Athletic Bilbao (29) and bitter rivals Real Madrid (26), making him the all-time leading scorer in El Clasico.

In terms of individual goalkeepers, Diego Alves was Messi's most frequent victim, the former Almeria and Valencia man having conceded 21 goals against the Argentina superstar.

Real Madrid legend Iker Casillas was joint-third with 17 goals against, one fewer than the 18 Messi put past Gorka Iraizoz.

Messi is of course synonymous with Camp Nou, a ground where he has scored 394 goals in 381 games at an average of 1.03 per match. Madrid fans will be particularly sick of him as he has scored 15 times in 22 games at the Santiago Bernabeu – his second favourite venue.

That is followed by the Vicente Calderon, Atletico's old home (14 goals in 20 appearances). Deportivo La Coruna's Riazor (13 in eight) and Sevilla's Ramon Sanchez-Pizjuan (13 in 18) complete the top five.

It's fair to say Barca have an almighty task on their hands in replacing him.

Messi's other notable records and achievements

– Messi is LaLiga's all-time leading scorer with 474 goals and is the second-highest scorer ever in Europe's top five leagues behind Cristiano Ronaldo (476).

– He scored in 21 consecutive LaLiga games between November 2012 and May 2013, a record for a player in the competition's history.

– Messi is one of only two players to reach 100 goals in Champions League history (120), alongside Cristiano Ronaldo (134).

– He was the first player to score five goals in a Champions League match, doing so against Bayer Leverkusen in March 2012 at Camp Nou.

– The Argentina forward is one of six players to score more than 50 goals in the Copa del Rey's history and the only one to score in six different finals in the tournament (Telmo Zarra scored in five).

LaLiga has seen a lot of upheaval over the past few months, none more so than since the start of August as Lionel Messi's future unravelled.

This will be the first season that LaLiga has been without Messi since 2003-04, and as such there are plenty of people suggesting Spain's top tier has subsequently lost much of its appeal.

Be that as it may, even with spending significantly limited among clubs this year, there are still some interesting new arrivals to LaLiga.

Below, Stats Perform uses Opta data to look at five of them…

Memphis Depay, forward - Barcelona, free transfer from Lyon

Granted, Barcelona's rocky financial situation means it is yet to be confirmed if Depay will be registered for the start of the season.

But assuming Depay is involved as Barca begin the campaign against Real Sociedad, he will be under pressure to help make up for the loss of Messi.

His record at Lyon at least shows he should carry a threat, and in theory he will be surrounded by better players at Camp Nou.

Depay scored 76 goals in 178 appearances for Lyon after joining from Manchester United in January 2017 and enjoyed a particularly impressive final season in Ligue 1, finishing with 20 goals to trail only Paris Saint-Germain star Kylian Mbappe (27).

The former PSV youth product's 12 assists and 94 chances created were more than any other player managed in France's top flight in 2020-21.

In all competitions, meanwhile, Depay scored 22 goals last term at an average of one goal every 141.5 minutes, making it his second-best season since arriving.

He massively exceeded his expected goals (xG) tally of 12.38, so perhaps he shouldn't be expected to be quite as prolific, but if he can reach double figures in goals and assists once again, Depay would have to be considered a shrewd signing.

David Alaba, centre-back - Real Madrid, free transfer from Bayern Munich

It has been a difficult few months for Madrid. While caught up in plenty of off-field controversy, they have also lost the centre-back partnership that guided them to so much success. Sergio Ramos and Raphael Varane, as well as their former head coach Zinedine Zidane, are no longer around.

The one signing Madrid have managed to bring in does at least offset one of those losses, as Alaba will offer experience, versatility and all-round quality at centre-back. After all, he made 298 Bundesliga appearances for Bayern, and a player does not reach such figures without being excellent.

He helped Bayern keep 111 clean sheets across those games, did not receive a single red card in the league, and made only two errors leading to goals in the competition, according to Opta data.

Bayern team-mate Thomas Muller is the only other player in Bundesliga history to have won 10 titles, and Bayern had counted on Alaba as their Mr Dependable. Carlo Ancelotti will hope he can form a great partnership with Eder Militao.

Rodrigo De Paul, central midfielder - Atletico Madrid, €35m from Udinese

While Diego Simeone has perhaps been a bit hit and miss when it comes to making the most of creative talents, De Paul appears to be ideal schemer for his new coach.

Providing creativity is De Paul's bread and butter, with his 82 key passes in 2020-21 bettered by only Hakan Calhanoglu (98) in Serie A.

Of those chances, 34 came from set-pieces, highlighting his prowess from dead-ball situations and ranking him fourth in Italy's top flight.

Only five players got more assists than his nine, but all of them massively out-performed their modest expected assists records, which ranged from 3.4 to 6.7. De Paul topped the charts for expected assists with 10.3 xA, evidence that his assists reflected the quality of his service rather than him getting lucky or benefiting from unusually good finishing by team-mates.

Yet the area which highlights a particular compatibility with Atleti is the fact he won more duels (294) than anyone else in Serie A in 2020-21.

Combine that with his league-leading completed dribbles (122) and it paints a picture of a hard-working player who also possesses the quality to get his team on the front foot.

Jose Macias, striker - Getafe, on loan (with purchase option) from Guadalajara

It is fair to say Getafe are not particularly one of LaLiga's most-fashionable sides. Under Jose Bordalas they were more renowned for their aggression and physical style of play, though new boss Michel has significantly different ideas.

In theory, that should immediately make them a more likable proposition for the neutral, and the signing of Macias will only add to the intrigue.

The 21-year-old Mexico international had been linked with numerous clubs with greater status than Getafe, such as Juventus, Borussia Dortmund and Sevilla, but Los Azulones pulled off something of a coup in bringing him to the Coliseum Alfonso Perez on loan with an option to buy.

Macias is the first forward that Guadalajara have sold to a European side since Javier Hernandez left for Manchester United in 2010 and he heads to Spain having netted 12 times in the most recent Mexican Apertura and Clausura campaigns.

His 20 shots on target in the 2021 Clausura was the most by a Mexican player, though it was during a loan spell with Leon where Macias really announced himself, netting 24 times in 38 Liga MX matches.

He didn't quite hit those heights again upon returning to Guadalajara, so the jury is still out to a degree, but there is lots of potential for Getafe to tap into.

Yusuf Demir, winger - Barcelona, €500k loan fee (€10m purchase option) from Rapid Vienna

Barcelona fans need not fear life without Messi, for they have signed the 'Austrian Messi'… or something like that.

Obviously that is a fair bit of pressure for an 18-year-old to have, particularly given he was initially signed for the B team, but he's produced some positive performances in pre-season for the senior side and arrived from Rapid with a burgeoning reputation.

While Demir only started in six of his 25 Austrian Bundesliga appearances (825 minutes) last season, he finished the campaign with a highly respectable seven goal involvements, which averages out at one every 117.9 minutes – only 10 players to play at least 825 minutes had a better record.

Despite only getting the one assist, Demir was a regular source of creativity when he did feature, as highlighted by the fact his 2.7 key passes per 90 was the sixth highest among those to play at least 825 minutes.

But arguably his most notable asset, and the one that inspires the comparison with Messi, is his ability on the ball.

A dynamic and exciting player, Demir attempted 6.3 dribbles per 90 minutes on average, a figure matched by no one who featured for more than 108 minutes last term.

Similarly, he was successful with 3.8 dribble attempts per game, which was also a league high. It was that kind of flair that helped him realise a childhood dream by moving to Camp Nou, and he could have a more prominent role than he may have initially predicted upon his arrival.

LaLiga is arguably harder to call than ever before heading into 2021-22 – Barcelona no longer have Lionel Messi to guide the way and Real Madrid have seen significant upheaval, so surely the smart money is on defending champions Atletico Madrid?

Diego Simeone's men won the title in 2020-21 after watching Barca and Madrid trade success for seven years and look in good shape given they've not lost any major players. But can you really write off the 'big two'?

Well, you shouldn't, according to Stats Perform predictions.

The Stats Perform League Prediction Model, created by Stats Perform AI using Opta data, has analysed the division ahead of the new season to assign percentages to potential outcomes for each club.

The model estimates the probability of each match outcome (win, draw or loss) based on teams' attacking and defensive qualities, which considers four years' worth of results, with weighting based on recency and the quality of opposition. The season is then simulated 10,000 times to calculate the likelihood of each outcome.

Without further ado, let's look at what could occur over the 2021-22 LaLiga season.

ANCELOTTI DELIVERS THE GOODS

Carlo Ancelotti's back at the Santiago Bernabeu, and so – it seems – will the Spanish title. The Stats Perform model calculates Madrid have a 42.3 per cent chance of taking the crown back from their local rivals.

In fact, if the model proves accurate, Atletico may not even finish in the top two, as their 18.7 per cent chance is a fair bit smaller than Barca's 30.4 per cent likelihood of winning LaLiga.

However, it's worth pointing out that, because the model is based on historical data points and results, the Barcelona that appears here is one that has had Messi in the team for past 17 years.

It's entirely reasonable to expect Barca to see a significant drop-off given they'll no longer have the greatest player of all time on their books – as such, a 30.4 per cent chance of winning the title might actually be quite generous.

THE BIG FOUR?

The 2020-21 season was the tightest LaLiga title fight in recent memory. Although Atletico were 11 points clear at one point, with five matches left there were just three points separating first from fourth.

In that respect, it was the closest title race LaLiga had ever seen in a 20-team campaign (1987-1995, 1997-present) and the least predictable since 2006-07, when Madrid, Barca and Sevilla could all win the league on the final day of the season.

Sevilla's challenge ultimately faded before that stage in 2020-21 but they've managed to keep Julen Lopetegui, their coach, and their squad is largely unaltered for the time being.

The prediction model makes them fourth favourites for the title (6.8 per cent) and far better placed to take the final Champions League spot (69.4 per cent) for the third year in a row than their likeliest challengers Villarreal (36.2 per cent).

There was a 15-point gap between fourth and fifth last season – this is the closest to a 'big four' Spain has had in years.

FOUR TIPPED FOR RELEGATION TUSSLE

Rayo Vallecano, Real Mallorca and Espanyol were the three to come up from the Segunda last season. While most people would ordinarily point to the promoted sides as the most likely to be relegated, the prediction model disagrees.

It gives Mallorca a 30.7 per cent likelihood of going straight back down, and Espanyol are at 17.6 per cent – neither of those are among the bottom three, though Rayo (45.9 per cent) are seen as the second favourites to head back to the second tier.

But it's Elche (57.9 per cent) who are the clear front-runners in this regard, and then it looks agonisingly close for the third and final relegation spot.

According to the predictor, it's likely to be neck-and-neck between Deportivo Alaves (41.1 per cent) and Cadiz (41.9 per cent).

Bayern Munich are entering a new era under Julian Nagelsmann, but it looks unlikely much will change when it comes to their dominance of the Bundesliga in 2021-22.

It could be another good season for Wolfsburg, but things are not looking too good for Greuther Furth, according to Stats Perform predictions.

The Stats Perform League Prediction Model, created by Stats Perform AI using Opta data, has analysed the division ahead of the new season to assign percentages to potential outcomes for each club.

The model estimates the probability of each match outcome (win, draw or loss) based on teams' attacking and defensive qualities, which considers four years' worth of results, with weighting based on recency and the quality of opposition. The season is then simulated 10,000 times to calculate the likelihood of each outcome.

Let's see what we can (likely) expect from the new Bundesliga season...

NO STOPPING NAGELSMANN

It looks like Nagelsmann's first season at the Allianz Arena is set to be a positive one. The predictor model gives Bayern a huge 84.3 per cent chance of winning the title for the 10th time in a row.

With the loss of David Alaba mitigated by the signing of Dayot Upamecano, there is little reason to doubt Bayern's credentials even as their new coach gets to grip with the job. Indeed, they are given just a 0.1 per cent chance of failing to qualify for the Champions League, while the likelihood of relegation stands at a big, fat zero.

Borussia Dortmund might have lost Jadon Sancho but they are still expected to be Bayern's biggest challengers, the Stats Perform model giving them an 11.7 per cent chance of a first title since 2012. RB Leipzig, third last term, have just a 2.9 per cent chance of finishing first, while Wolfsburg are fourth-favourites at a lowly 0.6 per cent. At least their chances of a Champions League spot stand at a strong 49.6 per cent.

TOP-FOUR TENSION

Last term's top four look likely to repeat their league positions, but don't discount Eintracht Frankfurt from a surprise Champions League place – they're given a 30.8 per cent chance of qualifying for Europe's top tournament.

Similarly, Bayer Leverkusen have just under a one-in-four chance of a top-four spot, with Borussia Monchengladbach at 14.7 per cent – slightly above their likelihood of a Europa League place.

BOCHUM OF THE PILE

Bochum won the second-tier title last term to return to the Bundesliga for the first time in 11 years. Their stay is not expected to be a long one, however: the Stats Perform model gives them a 54.8 per cent chance of being relegated in 2021-22.

Still, it could be worse. Greuther Furth are the favourites for the drop at 59.7 per cent, with a 15.8 per cent of finishing the season in the relegation play-off spot.

Cologne (27 per cent) and Augsburg (25.8 per cent) are the other favourites for the drop, while all four sides are given 18th out of 18 as their lowest probable finish.

Arminia Bielefeld fans should not feel too comfortable, either, given their side have a 19 per cent chance of going down.