The Champions League returns on Tuesday as the round of 16 gets underway, and what a way to kick things off.

Paris Saint-Germain host Real Madrid in what is widely considered to be the tie of the round, with particular interest in PSG duo Lionel Messi and Kylian Mbappe for differing reasons.

Sporting CP welcome Manchester City to the Estadio Jose Alvalade in the other first-leg encounter, with Ruben Amorim's men hoping to spring a surprise against the champions of England.

What do the numbers say about the opening games of the Champions League knockout stage, though? Stats Perform takes a look to decipher who is likeliest to come out on top.

Paris Saint-Germain v Real Madrid

Real Madrid have a slight edge over PSG in their 10 previous meetings in European competition, having won four and lost three. The French side lead 2-1 in the head-to-head in the knockout stages, eliminating Madrid from the 1992-93 UEFA Cup quarter-final and the 1993-94 Cup Winners' Cup quarter-final.

The last meeting between the two came in the group stage of the 2019-20 Champions League, a 2-2 draw at the Santiago Bernabeu. PSG won the previous game at Parc des Princes 3-0, and ultimately finished five points ahead of Madrid in Group A.

Los Blancos did win their last Champions League knockout game in Paris, beating PSG 2-1 in the round-of-16 second leg in 2017-18.

PSG will hope to improve their home record, having won just one of their past six such Champions League knockout games, a run including four defeats.

Since the start of the 2020-21 campaign, Mbappe – who is being linked with a move to Madrid when his contract expires at the end of the season – has been involved in more open-play sequences ending in goals (17) than any other player in the Champions League. He also has the highest expected goals sequence involvement of any player in this period (16.4).

Mbappe's France team-mate Karim Benzema, who is battling to be fit for the game, has found the net in each of his past four outings in the Champions League. Should he do so again on Tuesday, he will become just the third player to score in five consecutive appearances for Madrid in the competition, after Cristiano Ronaldo (four times, between 2013 and 2018) and Ruud van Nistelrooy in 2007.

The Spanish giants won all three of their away games in the group stage without conceding a goal. The only previous Champions League campaign in which they won their first four away games was in 2014-15, during Carlo Ancelotti’s first spell in charge.

Sporting CP v Manchester City

Sporting and City have only ever faced each other twice in European competition, which was their two legs in the round of 16 in the 2011-12 Europa League, with the Portuguese side going through on away goals.

City have only won once in their past six matches in Portugal (D2 L3), including their 1-0 defeat in last year's Champions League final to Chelsea in Porto.

This will be just the second time Sporting have played in the Champions League round of 16, with the previous occasion seeing them lose 12-1 on aggregate to Bayern Munich in 2008-09, the largest aggregate defeat in the competition's history.

City have kept just one clean sheet in their previous 11 matches in the Champions League and conceded at least once in all six group games this season. Still, should they win this game, Pep Guardiola's team will be the first in Champions League history to win five consecutive away games in the knockout stages.

Sporting boss Amorim, at 37 years and 19 days old, will be the second-youngest Portuguese coach to take charge of a Champions League knockout-stage tie after Andre Villas-Boas (34 years and 127 days) with Chelsea against Napoli in 2011-12. Villas-Boas was sacked prior to the second leg.

Among Portuguese players, only Ronaldo (six goals) has been directly involved in more Champions League goals this season than Sporting’s Pedro Goncalves (five – four scored, one assisted) and Manchester City’s Joao Cancelo (five – two scored, three assisted).

Saturday's 4-0 win at Norwich City was the first time Riyad Mahrez has failed to score for City since early December. The first of his seven-game scoring run was the final Champions League group clash, a 2-1 defeat at RB Leipzig.

Mahrez has also scored nine goals in his past 10 appearances in the Champions League and has been directly involved in six goals in his most recent six games in the knockout rounds (four scored, two assisted). Since the start of last season, Mahrez has scored at least four goals more in the competition than any other City player (Gabriel Jesus is next with five).

Porto and Sporting CP played out a 2-2 draw at the Estadio do Dragao on Friday, but wild scenes at the end saw four players shown red cards.

Sergio Conceicao's Porto had come from 2-0 down to level the match and then went close to a 96th-minute winner when a corner almost fell to Pepe to score.

An overhead kick clearance saved the visitors, however, and Pepe went down holding his face.

Sporting's players felt the former Real Madrid man was trying to buy a penalty, despite the final whistle having been blown, and soon numerous players and staff from both teams were squaring up on the pitch, with stewards and the officials attempting to restore calm.

Amid the melee, referee Joao Pinheiro sent off Pepe and Porto team-mate Agustin Marchesín, as well as Sporting duo Joao Palhinha and Bruno Tabata.

Sporting had already seen Sebastian Coates sent off early in the second half for two yellow cards.

After an early Paulinho header, a lovely team move ended with Nuno Santos making it 2-0 after 34 minutes as Sporting played from back to front, Pablo Sarabia eventually squaring for Santos to double Sporting's lead.

Ruben Amorim's side were eager for a win to close the gap in the Primeira Liga title race, but Fabio Vieira pulled a goal back just four minutes after Santos's strike, before a Mehdi Taremi header with 12 minutes remaining levelled things.

Following the late drama, Porto stay six points clear of Sporting at the top of the table and moved 13 ahead of third-placed Benfica, who have played a game fewer than their two rivals.

Perhaps there is something special to February 5. Or at least there is when it comes to world-class footballers.

On this day in 1985, Cristiano Ronaldo was born on the island of Madeira. Seven years later, Neymar came into the world in Mogi das Cruzes, in the Brazilian state of Sao Paulo.

Two of modern football's greats being born on the same day is quite the quirk, but while Ronaldo has gone on to cement himself as one of the best ever, it's hard to shake the feeling Neymar has never quite lived up to his extraordinary potential.

He emerged at Santos as Brazil's golden boy, a bona fide superstar in the making. By the time he left for Barcelona in 2013 at the age of 21, he was already been talked up as a shoo-in for a Ballon d'Or success.

Yet, as the forward hits 30, no Ballon d'Or has arrived. Indeed, he finished 16th in the voting for the 2021 award, and his move to Paris Saint-Germain has not seen him scale new individual heights.

Instead, he has been somewhat overshadowed by Kylian Mbappe, one of the new kids on the block, and it was his team-mate and close friend Lionel Messi who claimed a record-extending seventh Ballon d'Or last year.

Ronaldo, meanwhile, turns 37 back at the club where he became a global star.

Manchester United may not be the force they were under Alex Ferguson in Ronaldo's first stint, but his shock return to Old Trafford was a sensational story, and he continues to provide match-winning moments even if the comeback hasn't quite transformed the Red Devils into title contenders.

Using Opta data, Stats Perform looks back at what Neymar has achieved so far in his career, and how that stacks up against Ronaldo's feats by the time his twenties were over.

The trophies

Ronaldo was at Real Madrid when he turned 30 in 2015, a year after collecting his third Ballon d'Or, and a year prior to receiving his fourth. He went on to claim what was at the time a record-equalling fifth in 2017.

By the time he hit 30, Ronaldo had won four league titles (three Premier League wins, one in LaLiga), five domestic cup trophies and had enjoyed two Champions League triumphs. He had two Club World Cup successes to his name, and the UEFA Super Cup.

He played a pivotal role in Ferguson's dominant United team of the 2000s, combining with the likes of Wayne Rooney and Carlos Tevez in a thrilling attack to win three successive Premier League titles between 2007 and 2009, before his departure to Madrid in a then world-record transfer. His maiden Champions League success came in 2007-08, and he left United after losing to Barcelona in the 2009 final.

Indeed, Barca were the dominant force upon Ronaldo's arrival at the Santiago Bernabeu, and for much of the time before he turned 30.

In total, Ronaldo had won 16 major trophies by the time his twenties ended. Neymar, on the other hand, had already won six titles by the time he left Santos.

He added a further two league crowns to his name in Spain and won the Copa del Rey on three occasions, as well as the Champions League, Club World Cup and the Supercopa de Espana once each.

The Champions League has evaded Neymar so far at PSG, though he nevertheless has a trophy count of 10 and counting from his time in France, while unlike Ronaldo, he can count an Olympic gold – earned in Rio de Janeiro in 2016 – among his honours.

Neymar has won 28 titles, with 21 of those coming in Europe and one with the Selecao (Confederations Cup 2013). However, Neymar missed Brazil's triumphant 2019 Copa America campaign through injury.

The rivalries

Ronaldo was 28 when Barca signed Neymar for €86.2m. The days of the Guardiola-Jose Mourinho Clasico rivalry were over, though the clash was still littered with superstars on each side.

Prior to his 30th birthday, Ronaldo featured in 22 Clasico matches, starting 21 times. He scored 14 goals and provided one assist across 1,928 minutes of action. 

Neymar played against Ronaldo's Madrid in four of these games, scoring twice, including on his Clasico debut when he opened the scoring and teed up Alexis Sanchez's sublime winner in a 2-1 Barca victory.

Barca won two of the four Clasico games in which Neymar played while Ronaldo was in his 20s, with Madrid taking the bragging rights in the other games.

Neymar's overall Clasico record stands at three goals and as many assists from eight appearances.

The goals

Neymar has scored 195 goals in European club football since arriving at Barca in 2013. 

It is hardly a total to be scoffed at, yet it pales in comparison to the 411 Ronaldo had managed across his spells with Sporting CP, United and Madrid by his 30th birthday.

Indeed, by February 5, 2015, Ronaldo had already netted 36 goals in all competitions in 2014-15. He finished that campaign with an incredible 61 goals, the highest single-season total of his career.

That 61-goal haul came towards the tail-end of a run in which Ronaldo netted at least 50 times in six straight seasons. Neymar's best tally in a single campaign stands at 39 (2014-15), while his totals at PSG have dropped year-on-year, with his total for 2021-22 standing at three in all competitions, compared to Ronaldo's 14.

Ronaldo is also now of course the outright leading goalscorer in the history of international football, having overtaken Iran great Ali Daei.

The Portugal captain has netted 115 times for his country, with 52 of those coming in his twenties.

Interestingly, Neymar wins out by 18 goals in this regard, totalling 70 across 11 years of playing for Brazil. 

He still has some way to go to catch Ronaldo, who is of course still going strong for Portugal, though that is one target that may well be in Neymar's sights should he match Ronaldo's longevity.

That being said, Neymar's injury record would suggest that, unlike Ronaldo and Messi, his chances of going down as one of the all-time greats appear slim heading into his thirties.

Rewind to January 2020. At the time, Bruno Fernandes just seemed like he was becoming the latest in a long list of players who had been linked with Manchester United but ultimately never set foot in Old Trafford.

Remember Nico Gaitan?

But, as it happened, United did get a deal done for the Portugal midfielder, who – on the evidence of his time at Sporting CP – was going to bring goals, craft and fire to the Red Devils' engine room.

It would be fair to say he has surpassed the expectations of many fans and neutrals alike. While he undoubtedly has the capacity to frustrate, anyone who doubts his ability is surely just being contrarian.

Tuesday marks two years since his United debut, a disappointing 0-0 draw with – fittingly – Portugal Lite, or Wolves as they are known in the Midlands.

During his two years at United, Fernandes has become arguably their key man, best player and general lynchpin, the individual who most things are built around.

Yet, the noise around him this season would suggest United's wider issues have started to catch up with him – but just how accurate is that? Has his level truly dropped?

Over-reaction or justified criticism?

Regardless of your opinion on Fernandes' form, we can all agree he has been largely an excellent addition for United. Even when you take away the penalties, his 44 Premier League goal involvements since his debut is bettered only by Mohamed Salah (55), Harry Kane (46) and Son Heung-min (45).

His arrival introduced some much-needed creative consistency to the United midfield. Paul Pogba didn't quite provide that – whether that's entirely his fault is a debate for another time, but Fernandes has shown an ability to habitually unlock defences, with his 148 chances created in open play at least 18 more than any other player since February 1, 2020.

But in a season that has proven so tumultuous at Old Trafford, not even Fernandes has escaped criticism, which appears to be levelled at him now more vociferously among fans than at any other point in his two years there.

His off-the-cuff style undoubtedly feeds that. If a player is trying the killer ball at every opportunity and it frequently fails, that's obviously going to feed fan frustrations.

And, to be fair, there has been a slight drop-off in his creative threat. He averaged 0.25 expected assists (xA) per 90 minutes across his Premier League career before 2021-22, the fourth-highest among players to play at least 1,000 minutes, and that's at 0.21 for the current season – though that's still only bettered by six players (minimum 1,000 minutes).

He's never just been about threatening with his passing ability, though. Fernandes has been the club's best source of goals from midfield in years – his nine non-penalty (np) top-flight goals last season has only ever been bettered twice by a United central midfielder in the Premier League era: Paul Scholes in 1995-96 (10) and 2002-03 (14).

To his credit, Fernandes already has seven this season despite his np-xG slipping from 0.17 to 0.24 per 90 minutes. So, although he's not getting into as good goalscoring positions, he remains a potent weapon, which highlights the class he possesses. Of course, some might suggest that goals haul is somewhat skewed by his hat-trick against a notoriously open Leeds United on matchday one, but he still deservers his dues for that performance.

Furthermore, his average of 2.9 chances created every 90 minutes in 2021-22 is actually up slightly on his record for his first 18 months at Old Trafford (2.6) – so, while certain factions of the United support might be growing frustrated by particular aspects of Fernandes' game, it's clear to see he still offers a lot.

Out of his comfort zone

Another key element to be taken into consideration is the overarching institutional mess that has been Manchester United in 2021-22. The club is enduring a difficult season, with Ole Gunnar Solskjaer's reign coming to an end and Ralf Rangnick coming in.

There have been considerable changes to the backroom staff and the team is undergoing a significant philosophical shift, both in terms of tactics and formation. Solskjaer's plight came down to a collective failing, with so many players suffering a dip in form, and Rangnick's introduction may well have been something of a shock to the system – he and the Norwegian are hardly cut from the same cloth.

This has clearly impacted Fernandes, given his usual 'number 10' role suddenly became less assured. While Rangnick has shown a certain degree of tactical flexibility, with United appearing to operate with a 4-2-3-1 against Brentford, for the most part they have played 4-2-2-2 or 4-3-3.

As such, Fernandes has had to adapt and that's meant becoming something more closely resembling a roaming number eight, but with greater emphasis on operating towards the left.

As his touch locations map shows, Fernandes is averaging as many as 9.8 touches more per 90 minutes on the left flank under Rangnick than he was with Solskjaer this season. While his touch frequency through the middle hasn't changed massively, his numbers are down slightly except for in the zone just past the halfway line, where they have increased.

Perhaps, then, it should come as no surprise that Fernandes is having fewer shots (1.9, down from 2.5) and creating fewer chances (2.4, down from 3.1) under Rangnick than he was for Solskjaer, but there is every chance this is deliberate.

Rangnick may have felt Fernandes wasn't having enough influence in United's general play, with his touches per 90 minutes averaging at 69.1 this season under Solskjaer and Michael Carrick. That was well below his average pre-2021-22 (81.8) but it has since been boosted to 78.7.

Similarly, Fernandes – perhaps owing to operating more in less congested areas of the pitch – is playing 10.4 passes into the box on average every 90 minutes, which is 2.6 more than before.

Again, this may be a deliberate ploy to try to make the most of Fernandes' passing abilities, but it could also be argued this is where he's at odds with the new role and system. With his xA average slipping to 0.19 (per 90) for Rangnick, those extra passes into the box aren't – seemingly – hugely reliable in terms of good chance creation, meaning they are likely more hopeful than expectant.

Given Rangnick's desire for "control", one would think he'd want fewer hopeful deliveries into the box, favouring a more careful approach to attacking, but this could feasibly be put down to Fernandes still requiring time to adapt to a new function, which would be reasonable.

What's clear is the fact Fernandes' two-year anniversary arrives at a time when he's personally going through probably the most testing period of his United career, with the spotlight being shone directly on his contributions amid the wider narrative of team's general woes.

Maybe his levels have dropped slightly, but that's a common theme across this United squad. Either way, he's still proving effective, and it remains difficult to imagine them being a better attacking unit without him.

Kylian Mbappe, Lionel Messi and Sergio Ramos will come up against Real Madrid after Paris Saint-Germain were paired with Los Blancos in the Champions League round of 16, which had to undergo a re-draw.

PSG were initially drawn against Manchester United on Monday, throwing up a tantalising encounter between Lionel Messi and Cristiano Ronaldo.

However, a technical error meant the draw had to take place again and while Messi will not meet Ronaldo just yet, the Barcelona great will go up against his former club's Clasico rivals.

Having finished second in Group A behind Manchester City, who were handed a favourable tie against Sporting CP, PSG will host Madrid in the first leg in February before visiting the Santiago Bernabeu in March.

That means Mbappe, who is a high-profile target for Madrid and could well have already signed a pre-contract agreement with Los Blancos by the time these fixtures roll around, will go up against his suitors.

It also sees Madrid legend Ramos go up against his old club, and it is the same story for Madrid boss Carlo Ancelotti, who coached PSG from 2011 to 2013.

United, on the other hand, will face Atletico Madrid, who had initially been due to play Bayern Munich. The Bundesliga giants have been drawn against Salzburg.

Liverpool may well lament their luck. Salzburg had been their original opponents, but Jurgen Klopp's team now have to prepare for a tie against Serie A champions Inter - albeit they made light work of the Nerazzurri's rivals Milan in the group stage.

Coincidentally, holders Chelsea were again drawn against Lille, having been set a tie with the Ligue 1 champions during the initial draw. 

Villarreal will take on Juventus and Ajax go up against Benfica.

Champions League last 16 draw in full:

Salzburg v Bayern Munich
Sporting CP v Manchester City
Benfica v Ajax
Chelsea v Lille
Atletico Madrid v Manchester United
Villarreal v Juventus
Inter v Liverpool 
PSG v Real Madrid

UEFA has confirmed the Champions League last-16 draw will have to be re-done after a technical error with the initial procedure.

Manchester United and Paris Saint-Germain were set to face each other in the knockout stage, but that headline fixture and the other ties will have to be redrawn after what UEFA labelled as a "technical problem with the software of an external service provider that instructs the officials as to which teams are eligible to play each other."

United were initially drawn to face Villarreal, but the sides were unable to play each other as they had previously featured in the same group.

After complaints from affected clubs, including Atletico Madrid, UEFA later announced the draw would take place again at 1500 CET (1400 GMT).

UEFA's deputy general secretary, Giorgio Marchetti, spotted the mistake involving United's ball and ordered the tie to be drawn again. Manchester City were instead picked to go against Villarreal.

Yet United, due to the technical error, were subsequently blocked from being selected as one of the teams eligible to play the next team, which was LaLiga champions Atleti.

Bayern Munich were ultimately picked to face Atleti, while United were drawn in the glamour tie of the round against PSG – a game that would have seen Cristiano Ronaldo and Lionel Messi meet in the knockout stages of the Champions League for the first time since the 2010-11 semi-finals.

The re-draw could well benefit United, given the challenge of facing PSG. However, holders Chelsea and Liverpool were handed favourable draws against Lille and Salzburg respectively.

Inter had been due to face Ajax, while Sporting CP were up against Juventus. Real Madrid had been drawn against Benfica.

UEFA has confirmed the Champions League last-16 draw will have to be re-done after a technical error with the initial procedure.

Manchester United and Paris Saint-Germain were set to face each other in the knockout stage, but that headline fixture and the other ties will have to be redrawn after what UEFA labelled as a "technical problem with the software of an external service provider that instructs the officials as to which teams are eligible to play each other."

United were initially drawn to face Villarreal, but the sides were unable to play each other as they had previously featured in the same group.

After complaints from affected clubs, including Atletico Madrid, UEFA later announced the draw would take place again at 1500 CET (1400 GMT).

Cristiano Ronaldo reached yet another milestone when he scored his 800th career goal in Manchester United's clash with Arsenal on Thursday.

Ronaldo was reinstated to the United starting XI after being benched for the 1-1 draw at Chelsea, and he justified his return when he converted Marcus Rashford's cross early in the second half to put the Red Devils 2-1 ahead.

The strike takes Ronaldo to 11 goals in 16 appearances in all competitions in his second spell at United, having sensationally returned to Old Trafford in August when it initially looked as though he was heading to Manchester City.

The five-time Ballon d'Or winner has scored a combined 685 club goals for Real Madrid, Juventus, Sporting CP and United, with the other 115 coming with Portugal – no one has more than him on the international stage in the history of the men's game.

Ronaldo was most prolific in Madrid, scoring an incredible 450 goals in 438 appearances to become the club's all-time leading scorer, also providing 132 assists.

His best club season also came with Los Blancos, netting 61 times from just 47.9 expected goals (xG) in 54 games across all competitions in 2014-15.

In that campaign, Ronaldo registered the best minutes-per-goal ratio (76.1) of any player from Europe's top five leagues to have scored at least 10 in all competitions.

The Portugal captain's favourite opponent is Sevilla, scoring 27 times in just 18 appearances against them, although he will also have fond memories of Granada and Espanyol, scoring five goals in a game against each of them in 2015.

Not only is the 36-year-old forward the highest-scoring player in international football, he also boasts the all-time record in the Champions League (140).

Ronaldo's effort against the Gunners was his first in the Premier League in over a month, last netting in the competition back on October 30 when United beat Tottenham 3-0 away from home.

Antoine Griezmann and Saul Niguez were the big names to move late on deadline day, with Atletico Madrid having a busy night.

Griezmann's move to his former club completed a day of outgoings for Barcelona, who sold Emerson Royal and Ilaix Moriba, as well as loaning out Ray Minaj.

Ronald Koeman's Barca did get one player in, however, who will seemingly replace Griezmann in attack.

Barca's LaLiga rivals Real Madrid did not manage to get a mega deal for Kylian Mbappe over the line, despite a reported bid of €200m having been lodged on Tuesday, though Los Blancos did sign Rennes sensation Eduardo Camavinga.

Cristiano Ronaldo's move back to Manchester United was confirmed early on, but there was plenty of late action in England, too.

Another returning king as Chelsea call on Saul

Romelu Lukaku back to Chelsea. Ronaldo back to United. Now, Griezmann has made a return to one of his former clubs, with the 30-year-old re-joining LaLiga champions Atleti on a season-long loan.

There is an option to make the deal permanent for €40million – just the €80million less than Barca paid for the France forward in 2019.

Replacing Griezmann at Barca is Luuk de Jong, with Koeman turning to his compatriot from Sevilla. Messi to De Jong... not quite the end to the window Barca fans would have had in mind.

Saul, meanwhile, is leaving LaLiga. He has joined Chelsea on a loan deal from Atleti, with an option to buy for a reported £30m.

No Madrid move for Mbappe... yet

A third Madrid bid for Mbappe was reportedly lodged, and ignored, on Tuesday, as Florentino Perez's obsessive hunt of the Paris Saint-Germain star proved fruitless.

However, Mbappe is out of contract next year, so he may well be a Galactico soon enough.

One player who will be playing in the famous all-white strip this season is teenage midfielder Camavinga, who has joined from Rennes.

As well as keeping Mbappe, PSG added to their squad, completing a stellar transfer window by signing Sporting CP left-back Nuno Mendes to fill what has proved a problem position. Pablo Sarabia went the other way.

In Italy, Milan marked a quiet end to the window overall by confirming the signings of Yacine Adli and Messias Junior.

Inter already had their business done, while Juventus confirmed Moise Kean's return on Tuesday morning. The Bianconeri also signed Mohamed Ihattaren, who was then loaned to Sampdoria.

Ronaldo headlines Premier League moves

The early confirmation of Ronaldo's move back to United being complete was the biggest story of the day in England's top flight. It also paved the way for the Red Devils to sell Daniel James, who moved to Leeds United.

Arsenal blocked Everton's attempts to sign Ainsley Maitland-Niles, though Hector Bellerin did leave the Gunners to head to Real Betis on loan. Mikel Arteta's Gunners completed their record-breaking transfer window (in terms of overall spend) with the acquisition of Japan defender Takehiro Tomiyasu from Bologna. Earlier in the day, Arsenal loaned out Reiss Nelson and Alex Runarsson.

Their north London rivals Tottenham completed the signing of Emerson from Barca, with Serge Aurier's time at Spurs subsequently being brought to an end by the mutual termination of his contract.

Everton's hunt for a right-back was to no avail. The Toffees did bring in Salomon Rondon on a free transfer, handing the forward a two-year deal with an option for a third. James Rodriguez was involved in a mooted part-exchange deal with Porto for Luis Diaz, but the Colombian star is staying put.

Manchester City rounded off their dealings by sending out seven players on loan. Among them was Patrick Roberts, who was one of three players to join Ligue 1 club Troyes.

Wolves were unable to complete deals for Kieffer Moore or Boubacar Kamara. A late offer from Spurs for Adama Traore was reportedly rejected.

Czech Republic midfielder Alex Kral joined West Ham on loan from Spartak Moscow. He was the Hammers' second signing of the day, with Croatia playmaker Nikola Vlasic having arrived early on.

There were two outgoings at Celtic. Scotland international Ryan Christie signed for Bournemouth, while Crystal Palace bought striker Odsonne Edouard for a reported £15m. The Hoops replaced him with Greece forward Giorgos Giakoumakis.

Paris Saint-Germain capped a busy transfer window with the loan signing of highly rated left-back Nuno Mendes from Portuguese champions Sporting CP, with Pablo Sarabia moving in the other direction.

Mendes joins PSG on a season-long loan, while the Ligue 1 giants have the option to buy the Portugal international at the end of the season.

The 19-year-old had previously been linked with the likes of Manchester City and Liverpool, but he has made the move to PSG alongside fellow recruits Lionel Messi, Sergio Ramos, Gianluigi Donnarumma, Achraf Hakimi and Georginio Wijnaldum.

A product of Sporting's famed youth academy, Mendes played a key role as the club ended their 19-year title drought last season.

The teenager amassed a total of 47 appearances across all competitions, scoring once and tallying three assists for Sporting, who also won the Taca da Liga in 2020-21.

Last season, Mendes ranked fourth in the league in expected assists (3.44), third in duels won (186) and second in dribbles attempted (88).

Mendes made two Primeira Liga appearances this term, leaving an unbeaten Sporting side second in the standings and two points adrift of rivals Benfica through four rounds.

He joins a PSG team that standing two points clear at the top of Ligue 1 with four wins out of four and craving a first Champions League triumph.

Spain midfielder Sarabia will spend the remainder of the season on loan with Sporting.

The 29-year-old has scored 22 goals and provided 12 assists for PSG since his move from Sevilla in 2019.

Romelu Lukaku has starred for Inter since arriving from Manchester United in 2019.

Lukaku is spearheading Inter's quest for a Serie A title, with Antonio Conte's side clear atop the table.

His exploits, however, have not gone unnoticed in Europe.

TOP STORY – LUKAKU HAPPY AT INTER

Inter star Romelu Lukaku is flattered by Barcelona's interest but is not looking to leave the Nerazzurri, according to Mundo Deportivo.

Lukaku has been linked with Barca, Real Madrid and former club Chelsea following his exploits for Inter, who are closing in on the Scudetto.

But Lukaku is happy at Inter, with the Belgium international only possibly leaving San Siro should the Italian powerhouse seek to raise funds.

ROUND-UP

- Tuttosport reports Cristiano Ronaldo wants to see out his Juventus contract, which runs until June 2022. Ronaldo has been tipped to leave Turin, where Juve are struggling under Andrea Pirlo this season. Former clubs Madrid and United have emerged as possible destinations, as well as Paris Saint-Germain. However, Ronaldo is keen to continue at the club, should they qualify for the Champions League.

- PSG star Kylian Mbappe remains a priority signing for Madrid, claims Diario AS. Mbappe has been a long-term target in the Spanish capital, though the economic fallout following the coronavirus pandemic appears to have derailed Madrid's pursuit. But Los Blancos – also linked with in-demand Borussia Dortmund sensation Erling Haaland – are still determined to prise Mbappe from Paris.

- Record reports United are ready to make a move for Sporting CP star Nuno Mendes, who has also been linked with Manchester City and Liverpool. United could reportedly use Alex Telles in a deal to sign the Portuguese full-back.

- Milan captain Alessio Romagnoli is eyeing a new deal amid interest from Barca and Chelsea, according to Calciomercato. Romagnoli is contracted to the Rossoneri until 2022. Barca's reported pursuit comes as they eye the likes of Bayern Munich star David Alaba, City duo Eric Garcia and Sergio Aguero, Lyon forward Memphis Depay and Liverpool midfielder Georginio Wijnaldum.

Lionel Messi has been tipped to leave Barcelona for either Manchester City or Paris Saint-Germain.

Barca have also been linked with Borussia Dortmund's Erling Haaland.

But Haaland could reportedly unlock Messi's future.

TOP STORY – HAALAND TO CITY MEANS BARCA STAY FOR MESSI?

Borussia Dortmund star Erling Haaland could hold the key to Lionel Messi's future at Barcelona, according to the front page of Thursday's Diario AS.

Haaland is a player in demand, linked with Barca, Manchester City, Real Madrid, Manchester United, Chelsea, Liverpool, Juventus and Paris Saint-Germain.

City have been tipped to sign Messi, but should they step up their pursuit of Haaland, the Premier League leaders could reportedly drop their interest in the Barca captain.

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- Mundo Deportivo says new Barca president Joan Laporta is preparing a contract renewal for Messi, who is set to become a free agent at season's end.

- Bayern Munich are eyeing a move for Tottenham star Son Heung-min, claims Football Insider. Son has reportedly been offered a bumper new contract by Spurs, but the former Bayer Leverkusen forward is wanted in Munich.

- Sporting CP's Joao Palhinha, Borussia Monchengladbach star Denis Zakaria and Sander Berge of Sheffield United are on the list of midfielders to replace City veteran Fernandinho, reports A Bola.

- Gazzetta dello Sport says Juventus and Barca are interested in Milan captain Alessio Romagnoli. The Italy defender is out of contract in 2022 and is reportedly seeking a €6million-a-year contract.

- Napoli are eyeing Lazio head coach Simone Inzaghi and sporting director Igli Tare, claims Radio Kiss Kiss Napoli. Gennaro Gattuso has been tipped to leave Napoli at the end of the season, with ex-Juve boss Massimiliano Allegri, Luciano Spalletti and Hellas Verona's Ivan Juric among the possible replacements. But Lazio duo Inzaghi and Tare are being monitored to replace Gattuso and Cristiano Giuntoli in Naples.

- United are interested in Lille defender Sven Botman, according to Fabrizio Romano. Sevilla star Jules Kounde has been on United's radar but the club's asking price of €80m (£68m) is too steep.

- Romano also says there is no agreement with United and Paul Pogba over a new contract. Pogba has been linked with former club Juve, Madrid and PSG.

It's entirely possible the staging of the 2021 European Under-21 Championship will have passed many people by, given the fact it's taken on a somewhat peculiar format of a mid-season group stage with the knockout phase following two months later.

Originally due to take place solely in June, organisers were forced into a re-think following last year's postponement of the senior competition. It was decided to split the Under-21s' event in two, therefore avoiding a clash.

Despite the rather unconventional format, the competition will see many of the continent's most-promising prodigies on display.

The tournament, based in Hungary and Slovenia, begins on Wednesday with the Magyars hosting Germany, and we have identified some high-potential talents to keep an eye on.

Alban Lafont, France – Goalkeeper

Lafont has been a regular at this age-group level with France for many years, but a brief stint at Fiorentina in 2018-19 did not go to plan, with the Toulouse youth product freely admitting his performances "were not the best" as he secured to a loan move to Nantes ahead of last season.

Only Andrea Consigli (six) made more than Lafont's four errors leading to shots in Serie A two seasons ago, but his dependability appears to have improved considerably since returning to France, with no shots occurring because of errors by him in 57 Ligue 1 matches.

He also produced a particularly strong performance in the shock 2-1 win over Paris Saint-Germain earlier this month, making four saves including a couple of eye-catching stops to thwart Angel Di Maria.

A closer at Lafont’s performances for a struggling Nantes side in 2020-21 reveals he has not had the greatest campaign. When discounting own goals and penalties by the opposition, Lafont has allowed 3.5 goals more than the ‘average’ goalkeeper would have been expected to concede in Ligue 1 this season (37 conceded, 33.5 xG on target).

The metric ‘Goals Prevented Rate’ can account for different goalkeepers facing a different volume of shots through a period of time. An example of this is that PSG goalkeeper Keylor Navas has a goals prevented rate of 1.37 this season, meaning for every non-penalty goal that Navas has conceded (excluding own goals), the average goalkeeper would be expected to concede 1.37. Lafont’s rate of 0.91 this season is 10th out of 17 goalkeepers to have played 1800 minutes of French top-flight football in 2020-21.

Additionally, France's regular at this level knows he has a very capable understudy in Illan Meslier breathing down his neck.

Prior to his 21st birthday earlier in the month, Meslier broke the record for the most clean sheets by an under-21 goalkeeper in a single Premier League season (eight) and has since added another to that figure.

That means he has three times as many shutouts as Lafont, which is intriguing because it raises the question of why then has Meslier not conceded fewer goals?

For starters, it suggests Lafont is more consistent but also highlights that when Leeds concede, the floodgates can really burst open. With those 46 goals spread across 19 matches, it means Meslier is conceding on average 2.5 goals per game when he doesn't get a clean sheet – this drops to 1.7 for Lafont.

On top of that, Meslier's seven errors leading to shots is more than any other player in the Premier League this term, perhaps showing he's still in the inexperienced, nervous phase that Lafont has seemingly left behind.

Meslier's superior save percentage of 71.1 compared to 65.7 speaks to the former Lorient youngster's shot-stopping abilities, though for the time being Lafont's greater consistency looks set to keep him first-choice.

Sven Botman, Netherlands – Central Defender

A promising loan spell with Heerenveen last season alerted Lille to the talents of Ajax-owned Botman and he has been a real hit for Les Dogues since a reported €8m move, helping them to mount a serious Ligue 1 title challenge.

Lille's 19 goals conceded is the fewest in France's top tier and, while not necessarily entirely down to Botman, there's no doubt he's made his presence known as a reliable powerhouse at the back.

Of the 856 players across Europe's top five leagues to have engaged in at least 150 duels, Botman's 71.4 per cent success rate is the best, and that competitiveness is also reflected in his aerial prowess.

Only four of the 157 players in the continent's elite divisions to have been involved in 100+ aerial duels have a better success rate than the Dutch youngster (72.5 per cent).

While his impressive physical attributes might lead to certain assumptions about his style of play, Botman is more than a brutish centre-back, as proven by the fact his 452 ball carries – defined as a player moving five metres or more with the ball – is the fourth highest among Ligue 1 central defenders.

Of course, there is likely to be a glaring absence from the senior Dutch side at Euro 2020. with Liverpool boss Jurgen Klopp not expecting Virgil van Dijk to be ready for the tournament.

That means there is potentially a spot up for grabs in the centre of the Netherlands defence, and Botman's combination of power and elegance suggests he could be a good fit as Van Dijk's deputy.

Granted, the young defender – who hasn't been capped at senior level yet – still has a way to go to match up to the Reds star, but in the context of young defenders of a similar ilk, Botman certainly compares well and his strengths are similar to those of Van Dijk.

His aerial stats prove he's an excellent physical specimen, and his effectiveness in duels reflects the fact he's a difficult defender to beat. A strong showing here might just help convince Frank de Boer that Botman's ready to step up later this year.

Jules Kounde, France – Central Defender

Les Bleus are blessed with an embarrassment of riches in most areas, but the fact Kounde is turning out for the Under-21s in this tournament instead of the senior side exemplifies their depth in quality at the heart of the defence.

In his second full season with Sevilla, Kounde has kicked on following a hugely encouraging second half to 2019-20, so much so that he's arguably the first name on the team sheet for Julen Lopetegui.

His forward-thinking nature has made him key to the coach's 'Lavolpiana build-up' defensive structure, a setup attributed to Argentinian coach Ricardo La Volpe that essentially demands centre-backs carry the ball forward from a three-man backline.

Only two central defenders in La Liga have bettered Kounde's rate of 19.2 carries per 90, while there are just three who have covered more distance carrying the ball further up field than the Frenchman this term (2,774 metres).

This positivity is generally offset by Fernando dropping in to form a faux back three, while Kounde's movement up the right can often create overloads as he teams up with Jesus Navas, Sevilla's biggest chance creator (44).

But evidence of his progressive mentality doesn't stop there. While possessional stats can often be skewed for centre-backs, given the sheer number of simple short balls played between defensive colleagues, Kounde is clearly looking ahead, and often.

No defender has been successful with more forward passes in open play than Kounde this season in LaLiga (507), with the 22-year-old completing an impressive 79 per cent of these. Therefore, perhaps it's not surprising to learn no Sevilla player has been involved in more shot-ending build-up sequences than he has (53), demonstrating his value to their forays forward, despite not attempting the shots or making the final pass in that move.

Kounde is a prime example of how centre-backs can be just as satisfying to see in possession as your classic playmakers – in fact, that is essentially what he is developing into, a defensive playmaker of the ilk who would have looked at home in the great Barcelona teams of the past 14 years.

Pedro Goncalves, Portugal – Attacking Midfielder

It's fair to say that, when Sporting CP set out to replace Bruno Fernandes, never in their wildest dreams would they have expected what they got. Pedro Goncalves had been a key figure for Famalicao in 2019-20, but to say he's surpassed expectations in Lisbon would be an understatement.

Goncalves operates in similar spaces to Fernandes, albeit drifting towards the right a little more, and his hot streak in front of goal has helped put Sporting on course for a first league title since 2001-02.

In 22 Primeira Liga matches, the attacking midfielder has scored 15 goals – none of which were penalties. The 22-year-old's xG total is just 6.9, meaning his over-performance of 8.1 is the biggest across Europe's top six leagues, aside from the phenomenal Robert Lewandowski (9.3).

Of course, the chances of him being able to sustain such a run in the long-term are low, but it still highlights what a danger the former Wolves youngster poses in his current form.

Comparisons with Fernandes have been rife, for obvious reasons, but they show many different traits to their game.

In Fernandes' final 50 league games for Sporting, he averaged 3.4 shots per 90 minutes and 2.3 of those non-penalty shots came from outside the box – Goncalves attempts 2.6 on average each game, with only 1.1 coming from beyond the penalty area.

As such, the average quality of Fernandes' shots in his final 50 games for Sporting weren't outstanding, with his xG per non-penalty shot equating to 0.07. Goncalves' is almost double that at 0.13, suggesting he picks his moments more selectively while also taking fewer attempts.

Nevertheless, despite Fernandes' penchant for a long-range effort, he only scored four times from outside the box in his final 50 league matches for Sporting – Goncalves already has three this term from 28 fewer games.

The biggest difference between the pair is assists. Fernandes' 20 in his final 50 outings for Sporting dwarfs Goncalves' three in 2020-21, but interestingly their expected assists per 90 minutes isn't hugely dissimilar. Fernandes is ahead 0.29 to 0.20 in this area, but a potential explanation for this potentially lies in the respective teams they've played in.

The next highest-scorer for Sporting this season after Goncalves himself is Nuno Santos with six – they don't have a prolific centre-forward, whereas Fernandes was supplying Bas Dost, who netted 76 times in 84 league games for the club between 2016 and 2019.

As we all know now, Fernandes was on the trajectory of an elite-level player. He's proven this at Manchester United, though there were certainly those who were sceptical about him prior to his move.

It'll be a tough ask, but why can't Goncalves continue to defy expectations?

Fedor Chalov, Russia - Forward

Russian striker Fedor Chalov is undoubtedly one of the most experienced players involved at the tournament, with the 22-year-old having already played 115 Russian Premier League matches in addition to his 11 UEFA Champions League appearances.

Chalov burst on to the scene in Russia with CSKA Moscow at 18 years old back in November 2016 and scored in just his fifth top-flight appearance for the club versus Ural a month later.

After scoring six goals in each of his opening two league seasons at CSKA, 2018-19 was when he really began to make a name for himself in Russia - winning the league's top scorer award with 15 goals, while also posting his best-ever season tally for assists (7).

But Chalov's career hasn't kicked on as expected since then, scoring just 13 goals in 50 top-flight appearances over the past two seasons, but his performances have been stirring enough to attract the attentions of multiple Premier League clubs during the January transfer window.

Despite this, Chalov's numbers domestically at top-tier level are mightily impressive for a player so early in his career. Despite only being 22, Chalov's tally of 60 goal involvements since his Russian Premier League debut are the third most by a player in the competition.

Russia are certainly one of the underdogs for the 2021 Under-21 European Championship and are unlikely to top their group, having been drawn alongside favourites France. However, if Chalov can find form in the first stage of the tournament then he could be the linchpin to Russian hopes of qualifying for the knockout stages in May.

Cristiano Ronaldo's future is dominating headlines.

After Juventus crashed out of the Champions League last 16, Ronaldo has been linked with a move away from Turin.

Could a return to the Spanish capital be on the cards?

TOP STORY – RONALDO ON MADRID'S RADAR

Real Madrid are interested in bringing Juventus superstar Cristiano Ronaldo back to the club, according to the frontpage of Monday's Diario AS.

Ronaldo – Madrid's all-time leading goalscorer – left Los Blancos for Juventus in 2018 but his future with the Serie A champions is far from certain following their Champions League elimination.

Diario AS says Ronaldo represents an easier and quicker target than Borussia Dortmund's Erling Haaland and Paris Saint-Germain superstar Kylian Mbappe.

Marca, though, insists Ronaldo's possible return does not alter Madrid's objectives as they weigh up either Haaland – heavily linked to Manchester City, Manchester United, Chelsea, Barcelona, Juve, PSG and Liverpool – or Mbappe.

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- TodoFichajes reports United will turn their attention to Villarreal centre-back Pau Torres if they miss out on star Madrid captain Sergio Ramos, whose contract expires at season's end.

- Chelsea and United want to sign Rennes star Eduardo Camavinga, claims Diario AS. Camavinga has been tipped to join Madrid, while PSG have also emerged as a possible destination.

- Bayern Munich are in danger of losing head coach Hansi Flick, claims Bild. Flick has been named as a possible replacement for Germany boss Joachim Low. It comes as Bild says Flick's relationship with Bayern sporting director Hasan Salihamidzic is worse than previously known, while RB Leipzig coach Julian Nagelsmann has reportedly been sounded out.

- Football Insider reports Barca's move for Liverpool midfielder Georginio Wijnaldum is "95 per cent done". The Dutchman is set to become a free agent.

- City are set to make an approach for Sporting CP left-back and Madrid target Nuno Mendes, says Diario AS.

- ESPN claims Barca are tracking Rapid Vienna sensation Yusuf Demir. The 17-year-old is also reportedly wanted by City, United, Dortmund and Bayern.

- Ligue 1 side Monaco are interested in a two-year loan deal for Bayern goalkeeper Alexander Nubel, according to Kicker. Monaco are led by former Bayern head coach Niko Kovac.

Erling Haaland continues to dominate headlines.

The Borussia Dortmund sensation is one of the most sought-after players in Europe.

Manchester City and Real Madrid are reportedly going head-to-head to sign the Norwegian.

TOP STORY – AGUERO OUT, HAALAND IN?

Manchester City want to sign Borussia Dortmund star Erling Haaland as a replacement for veteran forward Sergio Aguero, according to Bild.

Aguero, who has been hampered by injury this season, is out of contract at the end of the current campaign.

Haaland is a player in demand, having been linked to Manchester United, Real Madrid, Barcelona, Liverpool, Chelsea, Paris Saint-Germain, Juventus and Bayern Munich.

But Haaland dominates the front pages of Thursday's Marca, Diario AS and Mundo Deportivo in Spain amid Madrid's interest.

The Norway international reportedly wants to listen to Madrid, who will need €150million to prise Haaland to the Santiago Bernabeu.

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- Calciomercato reports Lyon star Houssem Aouar remains on the radar of Juventus. Aouar has previously been linked with the Serie A champions, as well as Arsenal.

- Chelsea are interested in Monaco's defensive midfielder Aurelien Tchouameni, claims ESPN.

- O Jogo says Liverpool could reignite their interest in Sporting CP defender Nuno Mendes. Juve, Madrid and Milan have also been tracking the 18-year-old, who has a £60m (€70m) release clause.

- Edinson Cavani is open to extending his United contract, according to Fabrizio Romano. Cavani joined United as a free agent on a one-year deal at the start of the season. The former PSG star has been linked with Boca Juniors.