The transfer window does not close. It slams shut, and on Tuesday, it slammed shut with a flurry of late activity.

LaLiga champions Atletico Madrid were heavily involved, with Antoine Griezmann re-joining the club on loan from Barcelona while Saul Niguez left for Chelsea.

It marked the end of a difficult window for Barca, who of course lost Lionel Messi to Paris Saint-Germain, who rounded off a stellar three months by not only keeping Kylian Mbappe, but also adding promising left-back Nuno Mendes.

Earlier in the day, Cristiano Ronaldo's sensational return to Manchester United had been confirmed, perhaps putting the Red Devils right in the mix for the Premier League title, while Chelsea - buoyed by Romelu Lukaku's comeback - cannot be ignored.

Here, Stats Perform looks at the winners, and losers, of what has been a chaotic transfer window.

THE WINNERS

Paris Saint-Germain

Let's start with the obvious. Achraf Hakimi, Mendes, Sergio Ramos, Gianluigi Donnarumma, Georgino Wijnaldum and, of course Messi. Oh, and PSG kept hold of Mbappe, too, rebuffing three bids - the final one reportedly worth €200m - from Real Madrid for the 22-year-old superstar who is out of contract next year. Speaking of out of contract players, Ramos, Donnarumma, Wijnaldum and Messi were all brought in for combined fees of €0, although their wages are sure to be astronomical even by PSG's standards. In Mbappe, Neymar and Messi, PSG have, on paper, what could be the most feared attacking trident of the modern era, not to mention Angel Di Maria in reserve. Mauricio Pochettino's side look suspect defensively but have Ramos to come in, while Donnarumma will compete with Keylor Navas. If they do not win the Champions League this season, will they ever manage it?

Manchester United

It remains to be seen whether United really needed to go out and buy Ronaldo, but the temptation – and reportedly, the requirement to get one over on noisy neighbours Manchester City – was just too much. However, there is no doubting Ronaldo brings a focal point you could argue was still missing from the Red Devils' attack, though with so much quality at his disposal the pressure will be on Ole Gunnar Solskjer to deliver a trophy. United spent big on Jadon Sancho and also brought in a world class defender in Raphael Varane. A title tilt might not be expected just yet, but silverware in some form must be the goal now. After fan protests during the botched Super League proposals earlier this year, the Glazer family seem to have gone all out to prove they want success.

Chelsea

When it comes to Premier League title contenders, Chelsea have surely put themselves well in the running. The European Champions have brought in two major additions in the form of Lukaku and Saul, both players with a wealth of experience at the highest level, and both on the back of title-winning campaigns last season. The Blues did sell Tammy Abraham, Olivier Giroud and Kurt Zouma, among others, but the strength in depth Thomas Tuchel has to play with is remarkable. A deadline day move for Sevilla's Jules Kounde did not materialise, but Saul adds another fantastic option in midfield to go alongside N'Golo Kante, Mateo Kovacic and the in-form Jorginho.

Tottenham

For a long while, it looked as though Tottenham would be one of the big losers from this window. A prolonged managerial search eventually resulted in Nuno Espirito Santo's appointment, but the main saga was over Harry Kane's future. City reportedly made one bid, during Euro 2020, which was dismissed out of hand. The champions never did return with an improved offer, despite huge speculation, and Kane ultimately stayed put. Older players such as Joe Hart, Toby Alderweireld, Erik Lamela and Moussa Sissoko were moved out, while Bryan Gil, Pierluigi Gollini, Cristian Romero and Emerson Royal – a deadline day arrival from Barca – arrived to fill the gaps. Serge Aurier's contract was terminated, while three wins from three means Spurs sat top of the league heading into the international break.

Atletico Madrid

While Saul was a deadline day exit, Atleti have given themselves a great chance of retaining their LaLiga title. With rivals Madrid failing to land Mbappe, as well as losing two of their stalwarts, and Barca seemingly in disarray, there has never been a better opportunity for Diego Simeone's team to really assert themselves as top dogs in Spain. Griezmann's arrival, on a season-long loan with the option for either club to extend the switch, has bolstered a fearsome attack that already included Luis Suarez, Angel Correa, new signing Matheus Cunha and Joao Felix - though the latter may now find chances to play in his preferred position, nominally off the front man, even harder to come by. Saul was struggling to nail down a regular spot in the first team, but Atleti showed greater desire to keep Kieran Trippier, who stayed despite interest from the Premier League. Rodrigo de Paul also arrived from Udinese.

THE LOSERS

Barcelona

The chickens have finally come home to roost at Camp Nou. Years of mismanagement, and the impact of COVID-19, has left the club's finances in a shambolic state. Barca had agreed to a new deal with Messi only to then announce the deal could not be completed due to "financial and structural obstacles". Barca ended the window by selling promising youngster Ilaix Moriba to RB Leipzig and shipping off Emerson to Spurs. Then, late on Tuesday, Griezmann, who cost Barca €120m in 2019, was sent back to Atleti. Luuk de Jong, a target man Ronald Koeman worked with during his stint as the Netherlands' coach, was drafted in from Sevilla as a replacement. Memphis Depay seems ready to step up after his arrival from Lyon, while Eric Garcia and Sergio Aguero also came in on free transfers, though Gerard Pique, Sergi Roberto, Jordi Alba and Sergio Busquets were among the players who took pay cuts in order for Barca to register their latest acquisitions.

Inter

Serie A champions Inter were dealt a blow when, just after ending their 11-year trophy drought, coach Antonio Conte left the club. Financial difficulties meant the Nerrazurri had to cash in on prized assets, and Hakimi and subsequently Lukaku followed Conte out of the door. Lautaro Martinez did stay, however, with Inter reinvesting some of the funds to sign Netherlands right-back Denzel Dumfries, Roma striker Edin Dzeko and Lazio forward Juan Correa. Hakan Calhanoglu, meanwhile, joined from rivals Milan on loan, though it is difficult to see that being enough for Inter to challenge on all fronts this season.

Juventus

While Inter were weakened, it has to be said that Juventus – surely their closest rivals in the Scudetto hunt – also had a disappointing window. Like many European clubs, they have been hit hard by COVID-19, though appeared well set to challenge again after reappointing Massimiliano Allegri. However, Ronaldo decided he wanted out late in the window, and Juve did not stand in his way. An initial fee of £12.86m (€15m), payable over five years, was agreed with United, and Ronaldo left just like that. Moise Kean returned from Everton on a two-year loan with an obligation to buy as a replacement, while Manuel Locatelli was their other major acquisition and Weston McKennie's move from Schalke was made permanent. Based on the performance in Sunday's defeat to Empoli, however, Juve are far from the force they were during Allegri's last spell in charge.

Real Madrid

For a time last week, it really did look as though Madrid were going to end the window in sensational fashion. Three bids were lodged for Mbappe, but PSG did not buckle. Madrid did move for another French youngster – Edouardo Camavinga, who joined from Rennes on Tuesday – but overall it must be considered a poor window. Los Blancos allowed Ramos to leave on a free and sold long-time defensive partner Varane - just the eight Champions League winners' medals between them. Martin Odegaard was deemed surplus to requirements by Carlo Ancelotti and sold to Arsenal, though no buyers were found for fringe players Luka Jovic or Dani Ceballos. David Alaba's arrival on a free transfer from Bayern Munich at least softened the blow of Ramos' departure, and Mbappe may well be on board in 2022.

Manchester City

City broke the British transfer record to sign Jack Grealish from Aston Villa, who in turn have made smart acquisitions such as Danny Ings, Leon Bailey and Emiliano Buendia. While another attacking midfielder was more of a luxury than a necessity, City did miss out on Kane and then seemingly saw Ronaldo snatched from under their noses by United, though the club have claimed it is they who pulled out of the deal. Pep Guardiola went into the window wanting an out-and-out number nine following Aguero's departure, but for now the Premier League champions will have to carry on with makeshift forwards, it seems. Not that it did them much harm in 5-0 routs of Norwich City and Arsenal last month. Meanwhile, wantaway playmaker Bernardo Silva is still at the club, though he will remain a first-team regular.

Liverpool 

Unlike their league rivals, Liverpool never seemed focused on spending big. The Reds instead turned their attention to tying down the futures of key players, with Jordan Henderson, Virgil van Dijk, Trent Alexander-Arnold, Alisson, Fabinho and Andrew Robertson signing new deals. Ibrahima Konate came in from RB Leipzig to boost the defence – a clear area of weakness last season during an injury crisis – though Jurgen Klopp's squad does seem weaker. They have started the season well, but it remains to be seen how they cope without Wijnaldum and even Xherdan Shaqiri should injuries trouble them again.

Cristiano Ronaldo is relishing the chance to play in front of Manchester United fans again and says former boss Alex Ferguson is the main reason he returned to Old Trafford.

The Portugal captain finalised a shock move to United from Juventus on Tuesday for an initial fee of £12.9million (€15m), signing a two-year contract with the option of a third.

Manchester City appeared favourites to bring Ronaldo back to the Premier League, but United made a late push to re-sign their former forward and swiftly completed the transfer.

Ferguson was involved in luring the 36-year-old back to Old Trafford and Ronaldo has now opened up on just how big a part the legendary manager played in his decision.

"As everybody knows, since I signed for Manchester [United] at 18, Sir Alex Ferguson was the key," he told United's official website. 

"I remember when we played against Manchester when I was at Sporting Lisbon. For me, Sir Alex Ferguson is like a father in football for me. 

"He helped me a lot, he taught me many things, and in my opinion of course he had a big role because the relationship that we had, we keep in touch all the time.

"He's an unbelievable person. I really like him a lot and he was the main key for me to be in the position that I am, that I signed for Manchester United."

Ronaldo scored 118 goals in 292 appearances for the Red Devils under Ferguson, during which time he won the first of his five Ballon d'Or trophies.

That individual success translated to team glory, with United winning eight major honours across Ronaldo's six years at the club.

Ronaldo has since gone on to score a further 450 goals in 438 games for Real Madrid and another 101 times in 134 outings for Juventus in all competitions.

Asked why he felt the time was right to leave Juve to start a new journey, Ronaldo said: "I think it's the best decision that I have made. It's right on point in my opinion. 

"I moved from Juve now to Manchester, it's a new chapter. I'm so happy and glad.

"I want to carry on again, to make history, to try to help Manchester achieve great results, to win trophies and number one of them, to win great things."

Plenty has changed in the time Ronaldo has been away from United, not least the fact that former team-mate Ole Gunnar Solskjaer is now in the Old Trafford dugout.

Ronaldo, who finished as top scorer in Serie A last season with 29 goals, is hoping to pick up from where he left off by helping Solskjaer get off the mark with a first trophy as United boss.

"We had a chat, but of course I'm going to have time to speak with him face to face, to know what he expects," Ronaldo said. 

"As you know, I played with him for two or three years at Manchester United so I have a good relationship with him but now with a different role, I'm a player and he's a coach. 

"But it doesn't matter, my relationship with him is great and as I say before, I'm there in Manchester to help the team achieve his results and the coach can count on me for whatever he wants. So I'm available for everything."

Ronaldo is in line to make his second debut for United when they take on Newcastle United at Old Trafford on September 11.

"I have a fantastic history with this amazing club. I was here at 18 years old and of course I'm so happy to be back home after 12 years," he said. "I'm really glad and looking forward to my first game.

"With all the stadiums full of supporters, it's not the same that we had one year ago, those empty stadiums. The fans, they are the key, and I'm so glad. 

"The Manchester United fans, they are special, I know, I remember very well. I know they still sing my music which has made me feel even more happy.

"My commitment is to give everything on the pitch, like I did before, like I do it all the time, and try to do my best, help the team score goals, make assists, win games, and I hope to see them very, very soon."

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.

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.

Transfer deadline day has already been a busy one, even if the biggest move of all was one that was expected.

Manchester United, Juventus and West Ham have all made moves, while changes are expected at Arsenal and Tottenham before the window closes.

There is also a good chance of a young France star joining Real Madrid – but it's not Kylian Mbappe.

Here is a round-up of some of the deadline-day deals, and what could be coming...

Ronaldo in, Cavani out?

The biggest deal of the day was concluded early, as Manchester United completed the signing of Cristiano Ronaldo from Juventus for an initial £12.9million (€15m).

The Portugal star dedicated his return to Old Trafford to Alex Ferguson after his two-year contract was announced by the Red Devils.

Ronaldo's arrival has complicated things for Edinson Cavani, though. The striker was convinced to spend another year at the club by Ole Gunnar Solskjaer after impressing last season, but his pre-season was disrupted due to personal reasons and he did not start any of United's first three league games of the season.

There are reports Barcelona are interested in signing Cavani as Ronald Koeman is desperate for another striker, but the Red Devils are expected to resist offers unless they are particularly lucrative. Of course, if Cavani does leave, it would free up the number seven shirt for Ronaldo.

United's business is mostly concluded but Dan James is expected to sign for Leeds United on deadline day for a reported £25m.

Real Madrid close to Camavinga

With Kylian Mbappe apparently not going to get his move in this window, Real Madrid have turned their attentions to Rennes midfielder Eduardo Camavinga, who is expected to sign for Carlo Ancelotti's side before the deadline.

With Mbappe staying put at Paris Saint-Germain for now, any dramatic late offer for Borussia Dortmund's Erling Haaland looks unlikely. BVB have in fact bolstered their squad, signing Marin Pongracic on loan from Wolfsburg.

Kean and Vlasic on the move

Juventus moved quickly to confirm Ronaldo's replacement, announcing a two-year loan with a potential obligation to buy for Everton striker Moise Kean. Kean returns to Turin for an initial €7m (£6m) after having left for the Toffees two years ago.

There was also video footage early on Tuesday of Junior Messias arriving for a medical at Milan, the 30-year-old apparently poised to sign on loan from Crotone.

Croatia international Nikola Vlasic has secured his move to West Ham from CSKA Moscow for a fee said to be worth £25m. His arrival would appear to cast doubt on any further bid from the Hammers for Jesse Lingard, who impressed on loan last season.

Brighton and Hove Albion have also been active, signing Getafe left-back Marc Cucurella – formerly of Barca – after the Seagulls matched his €18m (£15.5m) release clause.

Leicester City are said to be exploring the opportunity to bring in Ademola Lookman on loan from RB Leipzig, while Odsonne Eduoard is close to a move to Crystal Palace from Celtic.

Spurs and Arsenal still active – but will Chelsea spend again?

Tottenham are expected to complete a deal for Barca's Emerson Royal for around £25.8m (€30m). That sale could give Barca just a little leg room when it comes to pursuing the striker Koeman wants.

There are also likely to be changes at Arsenal. With Hector Bellerin tipped to sign for Real Betis on loan, the Gunners are said to be close to signing Takehiro Tomiyasu from Bologna.

Meanwhile, Reiss Nelson could be on the verge of a loan move to Feyenoord, who had agreed to sign Amad Diallo from Manchester United for the rest of the season until the winger suffered a thigh injury.

Chelsea have already spent huge money on Romelu Lukaku, but it remains to be seen whether a loan for Saul Niguez or a permanent deal for Jules Kounde could be concluded.

Cristiano Ronaldo has completed his sensational move to Manchester United on an initial two-year contract with an option for a further year.

The Red Devils last Friday confirmed they had agreed a deal with Juventus to bring the Portugal captain back to Old Trafford.

Ronaldo is now officially a United player once again, 12 years after the 36-year-old forward left the club to join Real Madrid.

United will pay £12.9million (€15m), rising to £19.7m (€23m), for the five-time Ballon d'Or winner, who scored 118 goals in 292 appearances under Alex Ferguson in his first spell at the club.

Ronaldo had appeared poised to join Manchester City last week before United made a late effort to tempt him back to Old Trafford, with Bruno Fernandes, Rio Ferdinand and even Alex Ferguson – according to reports – speaking with the player to convince him to snub Pep Guardiola's side.

Ferguson signed an 18-year-old Ronaldo from the Portuguese's boyhood club Sporting CP in 2003, and that raw talent went on to establish himself as one of the finest players in Premier League history.

His 31-goal season of 2007-08 has only ever been bettered once in a 38-match campaign (Mohamed Salah, 32 in 2017-18). In all competitions that term, Ronaldo netted 42 times as United won the Premier League – Ronaldo's third – and Champions League, while he later took home his first Ballon d'Or.

Nine goal-laden years followed at Real Madrid, where he became the club's all-time record scorer, and he remained a reliable frontman for Juventus, scoring 81 times in 98 Serie A matches since the start of 2018-19. In all competitions, Ronaldo has scored 674 goals in 895 appearances at club level.

As well as help them to challenge for a first league title since Ferguson retired in 2013, United will hope Ronaldo can carry them further in the Champions League. A five-time winner of the trophy, he leads the way for goals in the history of the competition, scoring 134 times in 176 games, 14 ahead of his nearest competitor Lionel Messi.

A whirlwind day last Friday saw Manchester United reach an agreement with Juventus to bring Cristiano Ronaldo back to the club.

The deal was confirmed just hours after it had looked likely the Portugal star would be heading to Premier League champions Manchester City instead.

According to reports, United manager Ole Gunnar Solskjaer encouraged the club to enter the race when it began to seem inevitable Ronaldo would head to the Etihad Stadium. Contact from Bruno Fernandes, Rio Ferdinand and even Alex Ferguson helped persuade Ronaldo that a return to Manchester could mean only one thing.

It all made for a short-lived but extraordinary transfer saga that ended with United re-signing a player who made history with the club between 2003 and 2009, winning three Premier League titles, the Champions League and the first of his five Ballons d'Or.

Here, Stats Perform looks at some other deals that caused a shock in the sporting world...

Lionel Messi: Barcelona to Paris Saint-Germain, 2021

In the most sensational free transfer of all time, PSG again laid down a marker to the football world with the signing of Lionel Messi on a two-year contract. Just as he looked to sign a new Barcelona contract, the club informed him that their dire financial situation meant they could not bring their greatest ever player back under LaLiga's salary restrictions after his previous deal expired in June. A tearful Messi said farewell to the only club he had ever played for before heading to the fanfare of Paris and a reunion with Neymar.

Neymar: Barcelona to Paris Saint-Germain, 2017

The Brazilian had formed a potent attacking trio with Messi and Luis Suarez at Camp Nou but a move to PSG was inevitable when the French side met his world-record buyout clause of €222million. He has played an important role in their continued dominance of French domestic football but has so far been unable to guide them to Champions League glory. He was reduced to tears by his side's 1-0 defeat to Bayern Munich in the 2020 final and then failed to inspire the team in the 2021 semis as Manchester City knocked them out.

LeBron James: Cleveland Cavaliers to Miami Heat, 2010

Basketball icon James announced he would sign with the Miami Heat instead of returning to his hometown team, the Cleveland Cavaliers. Then a two-time NBA Most Valuable Player and a six-time All-Star, James added to the spectacle of the stunning move by announcing it on a special television broadcast called The Decision. He enjoyed four years in Miami, where he won a pair of NBA titles, before returning to the Cavaliers in 2014. 

Tom Brady: New England Patriots to Tampa Bay Buccaneers, 2020

Few people expected Brady to leave the Patriots after 20 years and six Super Bowl victories. Not only did one of the game's greatest ever quarterbacks leave, but he joined one of the least successful franchises in NFL history and instantly guided them to glory, leading the Buccaneers to the franchise's second Lombardi Trophy with a 31-9 triumph over the Kansas City Chiefs in Super Bowl LV.

Luis Figo: Barcelona to Real Madrid, 2000

Should Messi ever return to Camp Nou as an opposition player it is unlikely he will be on the receiving end of the kind of abuse that greeted Figo. Barca fans threw bottles, lighters and even a pig's head at the Portuguese star when he went back to Camp Nou with Los Blancos in the seasons following his controversial move.

Wayne Gretzky: Edmonton Oilers to Los Angeles Kings, 1988

In 1988, the Edmonton Oilers and Los Angeles Kings agreed a deal that shook the NHL to its core. The trade left Canada in disbelief, with a member of the country's parliament even proposing the federal government block the trade or buy Gretzky's contract and sell it to another Canadian team. "The Great One" would go on to enjoy eight successful years in Los Angeles before spells with St. Louis Blues and New York Rangers.

Cristiano Ronaldo has completed his sensational move to Manchester United on an initial two-year contract with an option for a further year.

The Red Devils last Friday confirmed they had agreed a deal with Juventus to bring the Portugal captain back to Old Trafford.

Ronaldo is now officially a United player once again, 12 years after the 36-year-old forward left the club to join Real Madrid.

United will pay £12.9million (€15m), rising to £19.7m (€23m), for the five-time Ballon d'Or winner, who scored 118 goals in 292 appearances under Alex Ferguson in his first spell at the club.

Ronaldo had appeared poised to join Manchester City last week before United made a late effort to tempt him back to Old Trafford, with Bruno Fernandes, Rio Ferdinand and even Alex Ferguson – according to reports – speaking with the player to convince him to snub Pep Guardiola's side.

Ferguson signed an 18-year-old Ronaldo from the Portuguese's boyhood club Sporting CP in 2003, and that raw talent went on to establish himself as one of the finest players in Premier League history.

His 31-goal season of 2007-08 has only ever been bettered once in a 38-match campaign (Mohamed Salah, 32 in 2017-18). In all competitions that term, Ronaldo netted 42 times as United won the Premier League – Ronaldo's third – and Champions League, while he later took home his first Ballon d'Or.

Nine goal-laden years followed at Real Madrid, where he became the club's all-time record scorer, and he remained a reliable frontman for Juventus, scoring 81 times in 98 Serie A matches since the start of 2018-19. In all competitions, Ronaldo has scored 674 goals in 895 appearances at club level.

As well as help them to challenge for a first league title since Ferguson retired in 2013, United will hope Ronaldo can carry them further in the Champions League. A five-time winner of the trophy, he leads the way for goals in the history of the competition, scoring 134 times in 176 games, 14 ahead of his nearest competitor Lionel Messi.

Raphael Varane was able to reflect on a winning debut for Manchester United, as he revelled in the intensity of the Premier League.

Signed from Real Madrid in the off-season, World Cup-winning defender Varane made his debut in United's 1-0 win over Wolves on Sunday.

Partnering Harry Maguire at the back, Varane made a team-high five clearances and provided the assist for Mason Greenwood's fortuitous late winner.

"A good feeling! I was very, very happy to be here and to help the team get this victory," the 28-year-old told United media.

"The feeling is absolutely amazing. The Premier League is very intense. The game, it's very fast. I came here for that feeling."

Asked if the major difference between his experiences in Spain and England was the intensity or the atmosphere, Varane replied: "Both. The atmosphere is fantastic, and the game is very fast.

"You have a lot of action during the game. You have to be focused and very concentrated because it never stops. It's attack, attack, counter-attack and it's very fast."

Varane is soon to be joined at United by former Madrid team-mate Cristiano Ronaldo, who is to return to Old Trafford after leaving 12 years ago.

United agreed a deal with Juventus on Friday for the five-time Ballon d'Or winner, who underwent a medical in Portugal this weekend and is expected to finalise his move before Tuesday's deadline.

"I am very happy. He's a legend and all players can learn when you play with him," Varane said of Ronaldo.

"It's a great help for all players, for all young players, and of course he never stops scoring goals, so he will help the team."

Chelsea have been linked with Sevilla's French defender Jules Kounde throughout the off-season.

The 22-year-old centre-back did not play for Sevilla at the weekend and reportedly wants to exit the club.

Kounde would be Chelsea's second major signing behind Romelu Lukaku, as the transfer window closure approaches.

TOP STORY – CHELSEA FACING MONDAY ULTIMATUM ON KOUNDE

Chelsea's drawn-out pursuit of Sevilla's Jules Kounde has hit another speed bump with the Spanish club issuing the Blues an ultimatum, according to AS.

Sevilla have told Chelsea if they do not submit a suitable offer on Monday, then they have to meet Kounde's €80 million (£68m) release clause.

Chelsea have not tabled a firm bid for Kounde beyond €50m, while the LaLiga outfit had reportedly previously wanted €60-70m.

ROUND-UP

- The Star reports that Cristiano Ronaldo's arrival at Manchester United will force Dan James out, with Everton, Brighton and Hove Albion, Leeds United and Crystal Palace all in the running for the Welsh winger.

- Manchester United are unlikely to move for Atletico Madrid full-back and long-term target Kieran Trippier reports the Manchester Evening News. United's capture of Ronaldo means their transfer business is over.

- Sport reports that Juventus are ready to make one final effort to sign Miralem Pjanic back from Barcelona. Juve are willing to take Pjanic on loan, with the midfielder out of favour at Barca.

- Aston Villa are set to table a £15m bid for Liverpool midfielder Curtis Jones according to the Express. The Villans are eager to strengthen having missed out on Arsenal's Emile Smith Rowe.

Manchester United duo Paul Pogba and David De Gea expressed their excitement for Cristiano Ronaldo's return to Old Trafford after defeating Wolves 1-0 on Sunday.

United set an English football record as they reached 28 away games without defeat with Sunday's win but the travelling fans had more reason to celebrate earlier in the week.

The Red Devils announced on Friday that a deal worth £12.8m (€15m) plus £6.9m (€8m) in add-ons had been agreed with Juventus to bring Ronaldo back to Manchester for a second spell.

And following United's record-breaking outing at Molineux, De Gea spoke excitedly about linking up with the Portugal captain.

"It’s like a dream for all the Manchester United fans, for us," the Spain goalkeeper said to Sky Sports post-match.

"To have him [Cristiano Ronaldo] back it is going to be great, you can feel in the atmosphere. Hopefully, he can bring something special as well to make the team even better. It's great to have him."

Pogba, who surpassed Ronaldo's Premier League assist record for the Red Devils against Southampton last Sunday, echoed De Gea's sentiments.

"Everybody knows [what he brings]," the Frenchman told Sky Sports. "He's already a legend in this club and he's coming back, so obviously it's huge for us, for the club.

"He's going to bring his experience, his quality and obviously when he comes the level goes up.

"We're really pleased he's coming but the most important today is the win so when he comes we keep this mentality of winning, and keep winning."

Jose Mourinho declared Cristiano Ronaldo's move back to Manchester United is "perfect business".

In a remarkable turnaround on Friday, United confirmed they had agreed to sign Ronaldo – who left Old Trafford in 2009 – from Juventus.

The 36-year-old is reportedly completing a medical in Lisbon this weekend, with personal terms and a visa to be finalised.

Mourinho, who is now at Roma after an ill-fated spell at Tottenham, managed his compatriot Ronaldo at Real Madrid between 2010 and 2013 and later went on to coach United as well.

Ronaldo had one of his best goalscoring seasons in 2011-12 under Mourinho's tutelage, scoring 60 times across 55 appearances in all competitions.

The forward averaged 1.1 goals per appearance, or one every 81.7 minutes. That haul included seven hat-tricks and he also provided 15 assists over the course of the season.

Asked for his thoughts on Ronaldo's swift departure from Serie A, and his United return, former Red Devils boss Mourinho told a news conference: "The only thing I say – and it looks to me something basic and logic – is that if Juventus are happy, if Cristiano is happy and if Manchester United are happy, this is the perfect business.

"I think there is no need to talk about Cristiano.

"There is no need to make any comment about someone who plays, wins, scores and makes history for 20 years."

Ronaldo represents United's fourth addition of the transfer window, following on from Tom Heaton, Jadon Sancho and his former Madrid team-mate Raphael Varane.

Kylian Mbappe is dominating headlines amid Real Madrid's pursuit.

Madrid are keen to prise Mbappe to the LaLiga club, though Paris Saint-Germain are in no hurry to part with the soon-to-be free agent.

Due to PSG's tough stance, Madrid could back out of negotiations.

TOP STORY – MADRID GIVE PSG ULTIMATUM

Real Madrid could walk away from their pursuit of Paris Saint-Germain star Kylian Mbappe, according to Le Parisien.

While Mbappe is out of contract at the end of the season, Madrid have been attempting to prise the Frenchman from PSG before the transfer window shuts.

The report claims Madrid will walk away from negotiations if a deal is not completed by Sunday.

There has been talk that PSG could target Borussia Dortmund's Erling Haaland as a replacement for Mbappe.

ROUND-UP

- Lautaro Martinez has agreed to sign a new contract with Inter, per Gianluca Di Marzio. Out of contract in 2023, the Argentina international – linked with the likes of Barcelona, Tottenham, Manchester City and Manchester United – will re-sign for four to five years at €6million per season.

- Willian will join Corinthians on a free transfer after Arsenal granted his release, says Fabrizio Romano.

- Romano also claims Feyenoord are close to bringing United sensation Amad Diallo to the Eredivisie club on loan.

- Widespread reports say Moise Kean is set to undergo a medical at Juventus as he gears up to join from Everton. It comes as Cristiano Ronaldo prepares to return to United. Juve are also eyeing PSG forward Mauro Icardi.

- Dortmund are working on a loan deal for Chelsea's Callum Hudson-Odoi, according to Sky Germany. Hudson-Odoi has long been coveted by Bundesliga champions Bayern Munich. Dortmund are also looking to bring in United full-back Diogo Dalot.

- Chelsea are nearing a transfer that will see Jules Kounde arrive from Sevilla after Kurt Zouma departed for West Ham, reports Goal. Chelsea are also reportedly still targeting Atletico Madrid midfielder Saul Niguez, who is wanted by United.

Massimiliano Allegri said Juventus cannot keep thinking about Cristiano Ronaldo after the struggling Serie A giants crashed to a shock loss against Empoli without the Manchester United-bound superstar.

Without Ronaldo as he edges closer to returning to Premier League contenders United, Allegri's Juve were upstaged 1-0 by visitors and newly promoted Empoli in Turin on Saturday.

Mancuso's strike lifted Empoli to a surprise victory and condemned Juve to a winless start to the season following last week's draw at Udinese.

Juve have failed to win either of their opening two in the competition for the third time in the last 52 Serie A seasons – having done so in 2010-11 and 2015-16, and head coach Allegri was asked about five-time Ballon d'Or winner Ronaldo's exit post game.

"Cristiano spent three years at Juventus, he scored goals, which he is very good at, he's an extraordinary player, but we cannot think about Ronaldo from now on," Allegri told DAZN.

"I have a fine squad, we simply must realise that we can't just dominate every match.

"We need to come together and this will help us for the future.

"I am optimistic, always."

Ronaldo joined Juve from Real Madrid in 2018 and he remained an ultra-reliable frontman for the Italian giants, scoring 81 goals in 98 Serie A games.

The 36-year-old 29 league goals last season and 36 across all competitions. In 2020-21, only four players across Europe's top five leagues scored more goals than his 36-goal haul.

Ronaldo is also contributing far less in other areas of the pitch than during his prime years. He won just six tackles last season, and only three in the league. Only five strikers with five goals or more in Serie A last season won fewer. In his 60-goal third season at Madrid, Ronaldo won 33 tackles.

The Portugal captain made 73 crosses in open play across all competitions, and 64 came in the league, the fifth-highest total of any five-goal-plus Serie A striker, but that number is far from what the former Sporting CP was producing at his career's peak. In his final season at United (2008-09) he put in 197 open-play crosses, and he topped 100 in each of his first three seasons at Madrid (2009-10 to 2011-12).

He continues to produce excellent figures, but he no longer vastly exceeds his expected goals (xG) totals and has instead almost exactly matched them in each season while at Juventus (2018-19: 28 goals from 28.3 xG; 2019-20: 37 goals from 35.84 xG; 2020-21: 36 goals from 35.34 xG).

Meanwhile, Juve have lost two successive Serie A home matches against promoted sides for the first time in their top-flight history.

Juve have also lost two consecutive league fixtures against promoted teams (Benevento in March and Empoli on Saturday) for the first time since 1999.

The Bianconeri have conceded in each of their last 16 league games – only twice in their Serie A history they have been on a longer streak without a clean sheet: 19 in April 2010 and 21 in October 1955

Leonardo Mancuso scored to secure a surprise 1-0 victory for newly-promoted Empoli in Turin that left Juventus stunned and still without a win in Serie A this season.

Mancuso ended his side's five-game run without a league goal at Juve in the competition as he opened the scoring from close range, while Guglielmo Vicario impressed in goal.

Without Cristiano Ronaldo as he edges closer to returning to Manchester United, Juve's main attacking threat came through Federico Chiesa, but even he could not steer any of his three attempts past the Empoli goalkeeper.

Chiesa forced early saves from Vicario, with surging runs creating both opportunities before the goalkeeper produced smart saves to parry away.

However, it was Mancuso who struck first, profiting from Nedim Bajrami's deflected shot to spin and volley past Wojciech Szczesny. 

Mancuso's opener stunned the vociferous Allianz Stadium and was Empoli's first Serie A away goal against Juventus since Sergio Almiron netted in January 2006.

Vicario pushed away another low effort from Chiesa, while Patrick Cutrone almost made it two but fired narrowly wide to Szczesny's right with a thumping effort.

On the stroke of half-time, Szczesny was called into action once more, retreating quickly to tip over the crossbar and spare Chiesa's blushes after the Juventus forward had looked to head backwards.

Paolo Dybala started the second half encouragingly, linking up with Alvaro Morata and drilling at Vicario before Bajrami forced another save from Szczesny.

Dybala curled wide from a free-kick, but the hosts failed to find a way past Vicario, ensuring a memorable victory for Empoli.