Roger Federer looks set to play the final match of his tennis career on Friday after opting to only take part in doubles at the Laver Cup, and has described his great rival Rafael Nadal as his "dream" partner.

Federer is set to join the likes of Nadal, Novak Djokovic and Andy Murray – the other members of tennis' 'Big Four' – in representing Team Europe at the O2 Arena in London, but his fitness issues have led to doubts over the extent of his involvement.

On Sunday, fitness coach Pierre Paganini said Federer would make "a last-minute decision" regarding the nature of his participation in the Laver Cup.

Paganini added: "His aim is to play something, though whether it's singles or doubles we'll have to see," and Federer appears to have opted for the latter option.

On Tuesday, Federer told the Swiss press he would only be appearing in doubles at the event, though his partner is yet to be revealed.

"I'm happy and surprised at how good my shots are. But I won't be able to play singles, that was pretty clear beforehand," he told NZZ.

"That's why it was no longer an option to compete at the Swiss Indoors at the end of October. I guess I'll play doubles here on Friday night and that's it."

Nadal, one of just two men's players to have won more grand slam titles than the Swiss maestro (22, also Novak Djokovic with 21) appears the most obvious candidate, with Federer telling SRF: "Maybe I can play doubles with Rafa, that would be an absolute dream."

Asked whether he had any regrets at the end of his career, Federer added: "Of course, there are smaller things, but I can't think of any examples. I see it as an absolute dream career.

"I had a relaxed childhood. If I had been a bit more professional when I was younger, I might have been more successful. 

"But then I might have burned out earlier because it would have been too serious for me." 

The Swiss great, who has won 20 grand slam singles titles, announced last week that he was to retire from tennis after battling knee injuries.

When revealing the end of his career was imminent, Federer said: "I've worked hard to return to full competitive form. But I also know my body's capacities and limits, and its message to me lately has been clear".

Casper Ruud expects to be "a bit nervous" when he features alongside childhood heroes Novak Djokovic, Rafael Nadal, Andy Murray and the retiring Roger Federer at the Laver Cup.

Ruud is the world number two heading into the tournament, which sees Team Europe take on Team World in London, after his efforts at the US Open.

The Norwegian fell just short against Spanish teenage superstar Carlos Alcaraz in the final at Flushing Meadows.

Ruud featured at last year's Laver Cup, held in Boston, and this year is due to join up with the 'Big Four' of Djokovic, Nadal, Murray and Federer, who has announced his impending retirement at the age of 41. The quartet have won 66 grand slam titles between them.

While there are some doubts over whether Federer will be fit enough to play in his farewell tournament, with the action starting on Friday, Ruud is "honoured" to have the opportunity to play alongside his idols.

"It's going to be so special this year, having the biggest four tennis players in my childhood," Ruud said in an interview on the Laver Cup's official website.

"It's going to be an honour. [I'm] probably going to be a bit nervous when I'm out there playing in front of them, but I'll do my best and I'm very happy to be able to represent Europe in front of a crowd full of cheerful fans, and a European bench of legends."

Ruud has played six matches against the illustrious quartet who will now be team-mates, winning only once – against Murray in San Diego last year.

The 23-year-old has lost three times to Djokovic and once to Nadal – in the final of the French Open this season – while his sole meeting with Federer, back in 2019 at Roland Garros, went the way of the 20-time major champion.

Federer helped to create the Laver Cup but did not play in the 2021 edition due to injury. He was, however, present to support Team Europe from the stands in Boston.

"I was playing the first match of the whole [2021] Laver Cup against [Reilly] Opelka," Ruud said. "It was the first time they showed Roger on the big screen in TD Garden in Boston, and the whole crowd erupted like I never heard before.

"I can only imagine what it will be like when he's on the team and when he will enter the court."

Federer announced the decision to bring the curtain down on his 24-year playing career on Thursday, having not competed since making the quarter-finals at Wimbledon last year.

Roger Federer ranks among sporting greats such as Michael Jordan, Tiger Woods and Tom Brady.

That was the message from 2013 Wimbledon champion Marion Bartoli, who hailed Federer after he announced his appearance at September's Laver Cup would be his last in professional sport.

The 41-year-old won 20 grand slam titles across a legendary 24-year career, only Novak Djokovic (21) and Rafael Nadal (22) can boast more major crowns in men's tennis.

Federer has also won more men's singles main draw matches in grand slam tournaments than any other player in the Open Era (369), leaving behind a magnificent legacy as he prepares to step away from the court.

Bartoli has experienced retirement herself, having called quits on her career after a failed comeback from injury in 2018, and asked by Stats Perform whether Federer was a GOAT – greatest of all-time – Bartoli said: "Yes, he is very much in there – absolutely.

"Michael Jordan, Kobe Bryant, LeBron James, Tiger Woods, Tom Brady, they are people that transcend their sports – they are icons.

"You go in the streets, you say Roger Federer. I'm in Dubai right now [and if] you say 'Roger Federer' everyone would know who he is. And the same for LeBron and Michael Jordan.

"When you transcend your sport and you become an icon and everyone knows who you are, that's when you know you have been one of the greatest of all time across every sport.

"Same for Serena [Williams], you can put Novak and Rafa in there as well. But it's just that amount of fame and that amount of inspiring [the next] generation."

Having spent 237 consecutive weeks ranked as number one, Federer holds the record for the longest such streak in men's singles history after a four-and-a-half-year spell at the summit.

Federer was also present in the top 10 of the men's singles rankings for 750 weeks, an unmatched number for a male player since the rankings were first published in 1973.

Regardless of Federer trailing Djokovic and Nadal for grand slam titles, Bartoli believes the Swiss remains the best of the trio due to his elegant playing style.

"It's very much depending on your own taste in a way. If you like beautiful, elegant, smooth tennis you have to go for Roger Federer," she added.

"Now obviously with Novak having 21 and Rafa having 22 grand slams, if we speak numbers only then you have two players on top of him.

"But I think it's very much a debate because it depends on the style of play you like and, that said, I absolutely love to see Novak play and win.

"I absolutely loved to see Rafa winning again at Roland Garros this year, I think it was one of the most incredible sports achievements that you can possibly witness.

"But in terms of game style, and the way he has revolutionised tennis, I think Roger was the first one. And then they pushed each other to new heights and I think that was really special to see."

While many youngsters look to emulate Federer, Djokovic and Nadal, Bartoli highlighted the importance of Pete Sampras and Andre Agassi, too.

"You can tell how much impact a player [has] when you see a new generation trying to copy your style. I think Pete Sampras had that impact as well as Andre Agassi on the generation of Roger, Rafa and Novak," she continued.

"Roger has had that impact on the new generation with Carlos Alcaraz. So that's why I say that he was really the first one to elevate the game to another level because he brought that dimension of his forehand when he was really almost able to play the ball wherever he wanted.

"I always remember that sentence from Andre Agassi, when he started to play against Roger saying, 'well, I never felt against anybody that I had to play on a 20-centimetre square because that's the only safe spot I can play, which is deep to Roger's back. If I play anywhere, he will take the game away from me'. [Federer] was the first one to [do that] and then obviously Rafa and Novak arrived and sought to change that and they pushed each other to new heights.

"When you have the pinnacle of the 2008 Wimbledon final and all those matches in between them that was just beyond epic for me."

Rafael Nadal says it has been "an honour and a privilege" competing with Roger Federer after the 20-time grand slam winner announced his retirement on Thursday.

In a statement posted on social media, Federer confirmed his "bittersweet decision" to call time on his top-level tennis career after next week's Laver Cup in London.

Federer won 20 grand slam titles across a legendary 24-year career, a trophy tally in majors that only Novak Djokovic (21) and Nadal (22) can better.

The 41-year-old has not competed since Wimbledon 2021, after which he underwent a third knee operation, but Nadal had hoped his fellow great would never retire.

"Dear Roger, my friend and rival. I wish this day would have never come. It's a sad day for me personally and for sports around the world," Nadal posted on his Twitter account.

"It's been a pleasure but also an honour and privilege to share all these years with you, living so many amazing moments on and off the court."

Nadal, who will team up with Federer and Djokovic as part of Team Europe's all-star cast at the Laver Cup, added: "We will have many more moments to share together.

"There are still lots of things to do together, we know that. For now, I truly wish you all the happiness with your wife, Mirka, your kids, your family and enjoy what's ahead of you."

Federer has spent 750 weeks in the top 10 of the men's singles rankings, an undefeated number for a male player since they were first published in 1973.

The Swiss has also won more men's singles main draw matches in grand slam tournaments than any other player in the Open Era (369).

As he brings down the curtain on his remarkable career, several other players paid their respects to one of the sport's all-time greats. 

"Some of Fed’s numbers are laughably impossible to top (23 straight slam semi-finals, for instance)," John Isner posted on Twitter. 

"But his impact on tennis far exceeds what he accomplished on court. Thanks for everything, RF."

Seven-time grand slam winner Petra Kvitova added: "Roger, you have always been such a huge inspiration to me. Your elegance, your grace, your beautiful game. 

"I have always held you in the highest regard and want to congratulate you for an amazing career. Tennis won’t be the same without you! Thank you."

Alexandra Eala became the first tennis player representing the Philippines to win a grand slam singles title as the Rafael Nadal Academy star lifted the US Open girls' trophy.

The 17-year-old beat the Czech Republic's junior French Open winner Lucie Havlickova 6-2 6-4 and did not drop a set in all six singles matches she played in New York.

As well as training at 22-time grand slam winner Nadal's academy in Mallorca for a number of years, Eala has taken inspiration from the Spanish left-hander too.

"I think my idol is obviously Rafa. But I'm not just saying that because I'm in his academy," she said.

"He's a very good role model, something a lot of people should idolise and try to be. The biggest thing I notice in Rafa is how he fights till the end, how his thoughts are so clear. He's so calm, but at the same time so fired up. I think I really tried to channel that energy during this whole week.

"That's also what I tried to show, to people who look up to me, to think with a clear head and to not act irrationally."

Eala was the 10th seed in New York and toppled the second seed in the title match, for a result she described as "very overwhelming".

Last year's women's singles runner-up Leylah Fernandez is a player whose mother is Filipino Canadian, while Emma Raducanu, who beat Fernandez, has a Chinese mother.

"I think the final last year was very groundbreaking, something very special," said Eala. "They're both young and both from diverse backgrounds. It definitely hit a lot of people."

The career of Carlos Alcaraz could be one that takes up a great deal of space in the record books, and he is getting started early.

Not yet old enough to buy a stiff drink in a New York bar, the 19-year-old was the toast of Flushing Meadows after a late-night win over Marin Cilic that ran into the early hours of Tuesday.

That five-set win against the 2014 champion, combined with the shock exit of Rafael Nadal at Frances Tiafoe's hands, has raised expectations that Alcaraz could scoop a first grand slam title on Sunday.

Should he land that breakthrough major, there will be another feather in his cap, making Alcaraz the youngest world number one since the ATP rankings were established in 1973, and the first teenager to hold down top spot. He has climbed from 32nd at the start of the year to his current position of fourth on the list.

Nadal is poised to go to number one, which he last held in February 2020, unless Alcaraz or 23-year-old Norwegian Casper Ruud reach the title match. They are the only two players remaining in the draw who can clamber to the top ranking, which Daniil Medvedev will relinquish after his fourth-round exit to Nick Kyrgios.

If both reach the final, the champion will go to number one.

In the city that never sleeps, Alcaraz completed a 6-4 3-6 6-4 4-6 6-3 win over Croatian Cilic at 02:23 local time, three minutes short of matching the latest finish in US Open history, shared jointly by three matches: Mats Wilander vs Mikael Pernfors (1993), John Isner v Philipp Kohlschreiber (2012), Kei Nishikori v Milos Raonic (2014).

The victory on Arthur Ashe Stadium made Alcaraz the youngest man to reach back-to-back US Open quarter-finals since Australians Lew Hoad and Ken Rosewall both achieved the feat before turning 19 in 1953. It was called the US Championships in that era.

Alcaraz has won a tour-leading 48 matches in 2022 and has become the youngest man to reach three grand slam quarter-finals since Michael Chang over 30 years ago.

However, he next faces a player making his own history.

Alcaraz's quarter-final opponent is a recent nemesis: Jannik Sinner, the 21-year-old Italian who beat him in round four at Wimbledon and again in the final of the clay-court event in Umag, Croatia, at the end of July.

"I played a couple of times against him," Alcaraz said. "He's a great player, really tough one. I lost twice in two months [to him] so I will have to be ready for this battle against Jannik."

There is a victory that Alcaraz could point to, having defeated Sinner on an indoor hard court at the Paris Masters last November, but they have never played on an outdoor hard court, which is where they will do battle on Wednesday.

Sinner has now reached the quarter-final stage of all four majors, becoming the youngest man to pull off that feat since a 20-year-old Novak Djokovic completed the set in 2008.

The last-eight duel with Alcaraz could be a sizzling clash, albeit Alcaraz and Sinner had some recharging to do on Tuesday after both were pushed to five sets in round four, in Sinner's case by Ilya Ivashka of Belarus. Alcaraz now has a 6-1 win-loss record in five-set matches.

Nobody remaining in the men's quarter-finals has a slam title to their name, and Alcaraz will hope he continues to have the backing of the crowd in Queens.

He said after fending off Cilic: "Of course, the support today in Arthur Ashe was crazy. After losing the fourth set, it was tough for me to come back in the fifth set, to stay strong mentally. But the energy I received today made me win."

Rafael Nadal's loss to Frances Tiafoe opened up a host of possibilities including a first-time world number one and maiden grand slam winner as the top three's domination of men's singles continues to weaken.

World number three Nadal bowed out in the fourth round to 22nd seed Tiafoe 6-4 4-6 6-4 6-3 on Monday, while third seed Alcaraz triumphed over Marin Cilic 6-4 3-6 6-4 4-6 6-3 in a match that went to almost 2:30am local time.

Cilic was the last remaining male player with a grand slam title to his name, meaning this year's US Open will bring a new major champion.

There may also be a first-time world number one too, with Alcaraz guaranteed to claim the top rank if he wins the US Open title.

Fifth seed Casper Ruud will rise to world number one if he lifts the US Open crown at Flushing Meadows on September 11 too.

If both fall short of the final, Nadal will reclaim the top ranking from 2021 US Open champion Daniil Medvedev, who lost in the fourth round to Nick Kyrgios.

Alcaraz could also scale the rankings summit should he reach the final, assuming Ruud misses out.

Frances Tiafoe is dreaming big after upsetting Rafael Nadal in the US Open fourth round on Monday to open up the men's singles draw.

The 22nd-seeded American stunned the 22-time grand slam champion, winning 6-4 4-6 6-4 6-3 in three hours and 34 minutes.

The victory meant Tiafoe reached the US Open quarter-finals for the first time, having fallen in the fourth round in the past three years. It also equaled his best-ever major return, having made the 2019 Australian Open quarters as well.

It also opens up the men's singles draw for a potential new grand slam winner, with Marin Cilic – who is due to play third seed Carlos Alcaraz on Monday evening – the last remaining major champion.

"Everyone is looking at it I'm sure," Tiafoe told reporters about the draw. "Everyone looks at it. Here we go, right? So am I. I'm just taking it day by day.

"Slams, crazy things can happen. Especially here in New York, so it's going to be a fun ride come Wednesday."

Tiafoe will take on ninth seed Andrey Rublev on Wednesday in the last eight, where he will hope to re-produce the "unbelievable" form he displayed against Nadal.

"I'm beyond happy, almost in tears, I can't believe it," Tiafoe said in his on-court interview. "I played unbelievable tennis today. I really don't know what happened."

During his press conference, he added: "It was definitely one hell of a performance… I just came out there and I just believed I could do it.

"It helps I played him a couple times. Haven't played him in some years [not since 2019]. I'm a different person now, different player."

Tiafoe had never beaten Nadal before, nor had he taken a set off the Spanish world number three. The victory was Tiafoe's third against a top-five opponent.

"For a while there, I was like, geez, you see all these young guys get Rafa, Fed [Roger Federer], Novak [Djokovic], am I ever going to be able to say I beat one of them?" he said.

"Today I was like, no, I'm going to do that. Now it's something to tell the kids, the grandkids, I beat Rafa."

Tiafoe was also blown away after four-time NBA MVP LeBron James tweeted after his win, labeling him the "young king".

"I was losing it in the locker room. I was going crazy," he said. "That's my guy, so to see him post that, I was like do I retweet it as soon as he sent it? I was like, you know what, I'm going to be cool and act like I didn't see it and then retweet it three hours later."

Rafael Nadal was frustrated by his performance when speaking with the media after his upset loss against Frances Tiafoe in the fourth round, admitting "he was better than me".

Nadal only allowed two total break point opportunities from the first three sets, but he was unable to save either, leading to Tiafoe taking the first and third frames. 

The all-time leader in men's grand slams then was uncharacteristically shaky in the fourth, committing four double faults and more unforced errors (nine) than winners (seven).

While reporters questioned if it was the oppressive humidity, injuries, or even the distraction of the roof closing mid-match, Nadal made it clear his poor performance had a much simpler explanation.

"Well, the difference is easy," he said. "I played a bad match and he played a good match. At the end that's it, no?

"I was not able to hold a high level of tennis for a long time. I was not quick enough on my movements. He was able to take the ball too many times very early, so I was not able to push him back.

"Tennis is a sport of position a lot of times – if not, you need to be very, very quick and very young. I am not in that moment anymore.

"My shots need to be better. In some way my understanding of the game and the quality of my shots were not good enough. They were poor, I think I have to say today, because I was not able to create that much on him.

"Well done for him. He was better than me."

With the last grand slam of the year now in the books for Nadal, he said he will take some time away to recuperate, but was non-committal about when he may return.

"I need to go back [home], I need to fix things, life," he said. "Then I don't know when I'm going to come back. 

"I'm going to try to be ready mentally. When I feel that I will be ready to compete again, I will be there."

Frances Tiafoe produced a stunning performance to knock Rafael Nadal out of the US Open and reach the quarter-finals of his home grand slam for the first time.

Tiafoe was playing in the fourth round at Flushing Meadows for the third successive year, but his prospects of going beyond that point appeared slim against the 22-time grand slam champion.

Nadal had won his two previous encounters with Tiafoe but found the 24-year-old up to the challenge this time around, his firepower proving too much for his illustrious opponent.

So often Nadal has snatched victory from the jaws of defeat and there were moments during his epic that he seemed primed to do so again. Yet winning the second set and breaking at the start of the fourth both proved false dawns for Nadal, as Tiafoe prevailed 6-4 4-6 6-4 6-3 to blow a men's draw that has already lost 2021 champion Daniil Medvedev wide open.

It became clear early on that the pace of Tiafoe's ball-striking and the variety in his game would cause Nadal problems and he got the break his play deserved when the Spaniard sent a pair of forehands long in the seventh game.

Tiafoe rarely looked daunted by the occasion and though he let a pair of set points go begging after going 40-0 up at 5-4, he snatched the third with a volley to ensure Nadal would have to mount a comeback.

A classic Nadal turnaround appeared very much on the cards when Tiafoe's composure deserted him trailing 5-4 on serve in the second, a double fault from the American allowing Nadal to level the match.

But any thought of Nadal, curiously unable to make an impression on Tiafoe's second serve, dominating from there was soon extinguished, Tiafoe breaking for a 4-3 lead in the third with a searing backhand down the line.

Tiafoe consolidated with an intelligent serve and volley play on his second serve and, after a Nadal hold, made no mistake in winning the third set on his racquet with an ace.

Controversy soon followed as Nadal broke a furious Tiafoe with a vicious forehand in a game played as the Arthur Ashe Stadium roof was closing.

Tiafoe received a code violation for "audible obscenity" after venting his frustration at that decision by the tournament officials, but he harnessed his anger in the right way. Nadal sent down a pair of double faults in an uncharacteristically sloppy service game and Tiafoe capitalised with a cross-court backhand that proved too hot for the four-time champion to handle.

A backhand error from Nadal gave Tiafoe another break for a 4-3, and he subsequently raced to the finish line, getting 40-0 on Nadal's serve and then completing the fairytale with on his second match point as Nadal sent another backhand into the net.

Data Slam: Tiafoe hands Nadal first grand slam loss of 2022

After winning both the Australian Open and the French Open, and withdrawing from Wimbledon due to injury, this is Nadal's first loss at a grand slam this year.

Tiafoe also joins James Blake and Andy Roddick as the only Americans to ever defeat Nadal at a grand slam, and it snaps Nadal's streak of 16 consecutive grand slam quarter-final appearances.

ACES/DOUBLE FAULTS

Tiafoe – 18/4

Nadal – 9/9

WINNERS/UNFORCED ERRORS

Tiafoe – 48/28

Nadal – 33/26

BREAK POINTS WON

Tiafoe – 5/8

Nadal – 2/6

Rafael Nadal says his third-round win over Richard Gasquet was his best of this year's US Open as he works his way back after the abdominal tear that ended his Wimbledon campaign.

Prior to the US Open, Nadal had only played once since withdrawing from the Wimbledon semi-final against Nick Kyrgios in early July, losing to Borna Coric in Cincinnati.

The second seed got past Rinky Hijikata and Fabio Fognini in four sets in the first two rounds at Flushing Meadows before Saturday's 6-0 6-1 7-5 win over French veteran Richard Gasquet in two hours and 17 minutes.

"My best match in the tournament," Nadal told reporters. "Easy to say that because the other day was tough.

"But important improvement. But I need to keep going. It's a good victory for me. Straight sets for the first time. Third set had been a challenge. He increased the level.

"I went through some difficult moments. That's something that is good that I went through that and saved that moments with a positive feelings. Happy to be in the fourth round, without a doubt."

The victory over Gasquet meant he has progressed to the second week at Flushing Meadows for the 12th time in his career, although he conceded he would need to lift his level to take out the title, starting with Monday's fourth-round match with 22nd seed Frances Tiafoe.

Nadal is gunning for his third major title this calendar year in New York, having triumphed at the Australian Open and French Open.

The 36-year-old's Australian Open success in February came after minimal preparation due to a foot injury, similar to his US Open lead-up due to the abdominal issue.

"I think I played better in Australia than here going to the second week," Nadal said. "But I have zero background in terms of victories and all this stuff.

"Here I played little bit worse than in Australia, without a doubt. But the story of the year and the results on the slams have been incredible, so that helps.

"I don't know the balance, what's better or worse. But all these victories help to be a little bit more confident. It's a moment to increase, to making a step forward."

"Second week against a great player like Frances, I need to be ready to play and to raise my level. I hope to be able to make that happen.

"I know is the right moment to make an improvement if I want to keep having chances to keep going on the tournament."

Second seed Rafael Nadal continued his staggering head-to-head domination of Richard Gasquet as he cruised into the fourth round at the US Open with a straight-sets victory on Saturday.

The 22-time major winner was irrepressible across the first two sets before Gasquet rallied in the third, but Nadal triumphed 6-0 6-1 7-5 in two hours and 17 minutes.

The victory means the 2022 Australian Open and French Open champion will face 22nd seed Frances Tiafoe in the fourth round and improves his head-to-head record against Gasquet to 18-0.

Nadal, who had been shaky early against Fabio Fognini last round, was ruthless when it mattered, hitting 35 winners for the match and winning 78 per cent on his first serve.

After dropping the opening sets in his previous two matches against Fognini and Rinky Hijikata, Nadal responded with a flawless first frame that included converting three of six break points.

Gasquet's belief seemed completely gone in the second set, managing no winners, with Nadal in control. The Frenchman ended Nadal's nine-game winning run to loud applause, raising his arms in celebration and probable relief.

Nadal broke early in the third but Gasquet responded to break back, pushing hard in the third set. But the Spaniard's quality shone highlighted by his finesse with a lob helping him claim the decisive break in the 11th game.

Data Slam: Rafa's longevity on show

Saturday's win was Nadal's 30th at night at Arthur Ashe Stadium and took his tally to 22-0 at majors this year, having only withdrawn from Wimbledon due to an abdominal injury. The triumph also saw him progress to the second week at Flushing Meadows for the 12th time in his decorated career, that includes four US Open titles. 

WINNERS/UNFORCED ERRORS

Nadal – 35/23
Gasquet – 19/29

ACES/DOUBLE FAULTS

Nadal – 2/8
Gasquet – 1/7

BREAK POINTS WON

Nadal – 7/15
Gasquet – 1/7

Rafael Nadal feared he had broken his nose after being struck by his own racquet in the second-round win over Fabio Fognini at the US Open.

The Spaniard, seeking a 23rd grand slam title, once again recovered from losing the opening set to claim a 2-6 6-4 6-2 6-1 triumph at Flushing Meadows.

He will now face Richard Gasquet after extending his winning streak at majors in 2022 to 21 matches.

But he will hope the pain from a nasty-looking injury has subsided by then, with Nadal's racquet having bounced off the court and into his nose while he was stretching to make a return in the fourth set.

The world number three needed a medical timeout and treatment, returning with a plaster on his face as the incident ultimately did little to slow his momentum.

"It was just a strong hit," said Nadal. "At the beginning I thought I had broken the nose because it was a shock at the beginning. It was very painful.

"I lost a little bit of the feeling in my head. It was like being a little bit out of this world.

"I don't know, it seems like it is not broken. I am not sure yet. I don't know. I think it's getting bigger and bigger."

For the second match in succession, Nadal had to come from a set behind, having also lost the opener to first-round opponent Rinky Hijikata.

Having struggled to find his rhythm early on, the 36-year-old was pleased that his persistence paid off.

"I'm happy after a terrible start. I don't understand yet how I started that bad because the feeling before the match was good," he said, the win having secured his spot at the ATP Finals for a 17th time.

"But these kind of things sometimes happen, so you need to accept and keep going. That's what I did.

"I'm lucky that Fabio made some mistakes and I was able to start putting some balls in and finish the match playing obviously better, much better."