Roger Federer conceded he had expected a greater test from David Goffin after he trounced the world number 15 in three sets in the US Open fourth round.

Federer needed just an hour and 19 minutes to see off Goffin 6-2 6-2 6-0 and progress to a quarter-final with Grigor Dimitrov.

The 20-time grand slam champion has hit his stride since dropping a set in each of his first two matches, having dispatched Dan Evans for the loss of only five games in round three.

In his post-match media conference Federer was asked about the particularly emphatic nature of his win over Goffin, and revealed he had anticipated more from the Belgian.

"Sometimes these scores just happen. You catch a good day, the opponent doesn't, then things happen very quickly," Federer said.

"Maybe he struggled a bit early on. But I found my groove after a while and was able to roll really. Never looked back. David wasn't nearly as good as I expected him to be. He was struggling a little bit today. I was able to take advantage of it, and I think that's the key.

"In a fourth round like this, if you can keep it nice, short, simple, you have to take them. I'm very happy."

In Dimitrov, Federer faces a player enjoying a resurgence at Flushing Meadows, the Bulgarian reaching his first tour-level quarter-final since January by overcoming Alex de Minaur.

During his emergence Dimitrov was known by many as 'Baby Fed', and the Swiss still sees him as his closest competitor stylistically.

"I'm happy that things are going better for him after he won Cincinnati a couple of years ago. Also the World Tour Finals. He had a bit of a slump," Federer said.

"This is the big quarters for him, obviously with an opportunity against me. I'm aware of the fact it's a big match for him.

"I've done well against him in the past. But new match, new Grigor, new me again. I don't know where we're going to be, if it's day or night, all that stuff.

"But I like watching him. I like playing against him. Of course, when we play, it's as close as it gets to being a similar playing style. I think for both of us it's cool to play one another."

Serena Williams suffered a worrying injury scare as she overcame Petra Martic to reach the quarter-finals of the US Open for the 16th time.

Last year's runner-up in the women's singles, who has endured a number of fitness issues in 2019, rolled her right ankle in the second set inside Arthur Ashe Stadium on Sunday.

The painful-looking incident did not prevent Williams from winning the next two points to break serve, and she duly completed a 6-3 6-4 victory after undergoing treatment during a medical timeout.

However, it remains to be seen whether the six-time US Open champion will be fully fit for her last-eight match against Wang Qiang on Tuesday, when she will seek to record a 100th match win at Flushing Meadows.

Martic, the 22nd seed, showcased plenty of imagination and shot-making ability on a rare show-court outing, but the underdog understandably struggled to handle her opponent's power and appeared to lose her focus after Williams' slip at the net.

Williams, who turns 38 later this month and first won the title at Flushing Meadows 20 years ago, certainly did not have things all her own way in the opening set.

However, after being broken from 40-0 up in the opening game, the veteran gradually seized control, her relentlessly aggressive approach reaping rewards.

Having moved 5-3 up when Martic stumbled on the baseline, a fired-up Williams had to save two break points before she took a leaf out of the Croatian's book with a drop-shot winner that sealed the set.

At that point, things looked routine for the eighth seed, but her subsequent fall sparked a dramatic change of atmosphere inside Ashe, with Williams immediately looking downcast as she got back to her feat.

"It affected me a little mentally," said the home favourite in her on-court interview. Nevertheless, she won the next two points to break and looked to be moving well as she wrapped up victory after heavy strapping was applied to her right foot.

Williams, whose win came two years to the day after the birth of her daughter, will now hope the slip leaves no lasting impact as she continues her latest bid to equal Margaret Court's record of 24 grand slam singles titles.

STATISTICAL BREAKDOWN
Serena Williams [8] bt Petra Martic [22] 6-3 6-4

WINNERS/UNFORCED ERRORS
Williams - 38/19
Martic - 11/12

ACES/DOUBLE FAULTS
Williams - 4/3
Martic - 2/1

BREAK POINTS WON
Williams - 3/8
Martic - 1/3

FIRST SERVE PERCENTAGE
Williams - 63
Martic - 62

PERCENTAGE OF POINTS WON ON FIRST/SECOND SERVE
Williams - 79/55
Martic - 60/46

TOTAL POINTS
Williams - 73
Martic - 56

Roger Federer's quest to reach a first US Open final since 2015 continued at pace as he dismantled David Goffin in straight sets at Flushing Meadows.

Federer has breezed through the draw in New York and, despite going down an early break at Arthur Ashe Stadium, was able to enjoy another comfortable early afternoon triumph.

The 20-time grand slam champion needed only an hour and 19 minutes to complete a 6-2 6-2 6-0 triumph in imperious fashion

Having easily avoided falling at the same stage he did last year, Federer will now face either Grigor Dimitrov or Alex de Minaur for a place in the semi-finals.

Goffin produced early signs of a potential shock when he put Federer under pressure in the third game and the Swiss netted a backhand to surrender a break.

However, Federer swiftly responded in kind and then broke to love for a 4-2 lead before going on to take the first set in just 27 minutes.

Belgian Goffin pulled a backhand wide to give Federer the break and a 3-1 advantage in the second. However, Federer went down 0-40 on serve in the subsequent game and handed the break back with a double fault.

Yet a poor volley followed by a poor backhand from Goffin saw Federer take the initiative once more, and there were to be no further slip-ups from the 38-year-old as he raced to victory.

Goffin's third-set surrender was meek as Federer shifted through the gears, brilliantly dictating proceedings and pulling a tiring world number 15 from pillar to the post.

Federer wrapped things up in trademark style with stylish backhand down the line to delight the crowd and send him into the last eight.

 

STATISTICAL BREAKDOWN
Roger Federer [3] bt David Goffin 6-2 6-2 6-0

WINNERS/UNFORCED ERRORS
Federer – 35/17
Goffin – 8/17

ACES/DOUBLE FAULTS
Federer – 10/3
Goffin – 0/4

BREAK POINTS WON
Federer – 9/10
Goffin – 2/7

FIRST SERVE PERCENTAGE
Federer – 68
Goffin – 50

PERCENTAGE OF POINTS WON ON FIRST/SECOND SERVE
Federer – 83/40
Goffin – 40/27

TOTAL POINTS
Federer – 83
Goffin - 39

Ashleigh Barty crashed out of the US Open in the fourth round as she suffered a straight-sets defeat to Wang Qiang at Flushing Meadows.

French Open champion Barty had the chance to set up a mouth-watering quarter-final clash against Serena Williams with victory at Louis Armstrong Stadium.

However, the second seed was well below her best in a 6-2 6-4 defeat marked by 39 unforced errors.

Wang, meanwhile, displayed impressive character in reaching her first grand slam quarter-final.

She saved four break points in a 10-minute game to hold for 5-3 in the second set and was required to hold off two more as she successfully served out the win in an hour and 22 minutes.

"I'm very focused on court, I just tried to hit aggressive," 18th seed Wang told ESPN on court afterwards.

Asked if she would be doing her homework by watching Williams' clash with Petra Martic, Wang said: "I think that's my coach's homework. I just want to enjoy now."

Teenager Coco Gauff thanked "class act" Naomi Osaka for her support after the defending US Open champion saw off the young sensation at Flushing Meadows.

Osaka marched on into the fourth round in New York with a 6-3 6-0 victory over the 15-year-old Gauff, who rose to prominence with a remarkable fourth-round showing at Wimbledon.

A packed crowd witnessed the action at Arthur Ashe Stadium, as Gauff's run in her home grand slam was ended in the third round.

After eliminating arguably the star of the first week of the tournament, Osaka swayed an emotional Gauff into joining her for the post-match on-court interview.

World number one Osaka told reporters in a news conference that the decision was an instinctive one.

"I wanted her to have her head high, not walk off the court sad. I want her to be aware that she's accomplished so much and she's still so young," Osaka said.

The 21-year-old later tweeted a photo of herself and Gauff shaking hands, captioning the post: "Keep your head up, you’ve got so much to be proud of. Warrior."

Demonstrating the bond between the pair, Gauff replied with a tweet of her own.

"Thank you! You are a class act. I appreciate your support" Gauff posted, before further confirming her admiration for Osaka by labelling her as a role model.

Swiss player Belinda Bencic awaits Osaka in the last 16.

Rafael Nadal should head into the second week of the US Open with a spring in his step after another routine win at Flushing Meadows.

Nadal was the beneficiary of a walkover in his second-round match after Thanasi Kokkinakis' withdrawal and needed just under two hours to beat Hyeon Chung in the third round in New York on Saturday.

Spanish second seed Nadal – looking to reclaim the title he won in 2017 – will next face 2014 champion Marin Cilic, who won the battle of the big servers with John Isner.

While Nadal has enjoyed a routine first week, Alexander Zverev continued to showcase a flair for the dramatic, needing four sets to beat Aljaz Bedene and reach the last 16.

 

ZVEREV: EVERYTHING CAN BE BETTER

Sixth seed Zverev played three tie-break sets in overcoming Bedene 6-7 (4-7) 7-6 (7-4) 6-3 7-6 (7-3), requiring three hours, 36 minutes to get through to round four.

It was another marathon effort from the German, which came on the back of a pair of five-setters with Radu Albot and Frances Tiafoe.

Diego Schwartzman – a winner against Tennys Sandgren – is next for Zverev, who knows the difficulty of his match is only going to increase.

"It doesn't get easier, the opponents don't get easier, the matches don't get easier," he said.

"There's still a lot of things to improve. Obviously, I mean, if you go into details, we'll be here for a very long time. In general, the serving, the returning. Everything can still be better."


MONFILS PRODUCES MAGIC AT SECOND HOME

Gael Monfils went the distance against Denis Shapovalov, the 13th seed eventually prevailing 6-7 (5-7) 7-6 (7-4) 6-4 6-7 (6-8) 6-3.

Monfils' best grand slam results came at the 2008 French Open and in 2016 at Flushing Meadows, reaching the semi-finals on each occasion.

Asked if he feels if the US Open is his second home, Monfils replied: "Here is definitely the second for me, the second slam in my heart, the second biggest tournament in my heart for many reasons.

"Also New York, my idol is Arthur Ashe. Always something magic happen. I feel very good here."

Pablo Andujar is Monfils' next opponent. The 33-year-old progressed to the second week of a slam for the first time in his career with a 6-4 6-3 6-2 defeat of Alexander Bublik.


GAMER KYRGIOS STRUGGLES UNDER LIGHTS

Nick Kyrgios had a tough act to follow as he faced Andrey Rublev last on Arthur Ashe following the blockbuster clash between Naomi Osaka and Coco Gauff.

The enigmatic Australian could not live up to the occasion, losing 7-6 (7-5) 7-6 (7-5) 6-3, having conceded to finding it difficult to see during the match.

He was heard saying "Call of Duty will ruin my life" at one point. Asked about those remarks, the 28th seed replied: "I was just taking a shot because I game a lot.

"My eyes might have taken a while to adjust to the lights, yeah. Bit of a gamer."

His fellow Aussie Alexei Popyrin was beaten by Matteo Berrettini 6-4 6-4 6-7 (3-7) 7-6 (7-2).

Coco Gauff felt world number one Naomi Osaka proved she is a true athlete with her conduct after their US Open encounter.

Defending champion Osaka needed only 65 minutes to see off 15-year-old Gauff 6-3 6-0 in Saturday's highly anticipated contest.

Osaka silenced a packed Arthur Ashe Stadium crowd with a ruthless performance to progress to the last 16 at Flushing Meadows.

However, she had the crowd on their feet after the match, as she persuaded a tearful Gauff to stay on the court so they could conduct a post-match interview together.

The pair were each reduced to tears as they spoke in front of a packed stadium that rose to acclaim for two players sure to be superstars of women's tennis for a long time to come.

Gauff was effusive in her praise of Osaka afterwards, telling reporters: "I think she just proved that she's a true athlete.

"For me the definition of an athlete is someone who on the court treats you like your worst enemy but off the court can be your best friend. I think that's what she did tonight.

"I definitely was wanting to leave the court because I'm not the type of person who wants to cry in front of everyone. I didn't want to take that moment away from her, as well.

"She told me it's better than crying in the shower. She convinced me, like, multiple times to stay. I kept saying no. Finally I said, Okay, I'll do it. Because I didn't know what to do.

"I'm happy that she kind of convinced me to do it because, I mean, I'm not used to crying in front of everyone.

"But I think she really showed sportsmanship tonight. I mean, I wasn't expecting it. I'm glad that I was able to experience that moment. I'm glad the crowd was kind of helping me and her.

"She was crying, she won. I was crying. Everybody was crying. But I think it was a good moment for both of us.

"I'm glad that I was able to express that moment. I guess it shows that I'm human. I guess athletes in general just experience things, and we show emotion, good and bad.

"I think a lot of people see the more pumping up side of me, the more fiery side. I guess that side is good for other people to see.

"I'm glad I was able to experience that on the biggest stage. Maybe next time I'll have a different result. I really thank Naomi for that because it was a good moment for me."

Gauff expects the experience of a heavy defeat to be beneficial as she plots a route to reaching the same heights as two-time grand slam champion Osaka.

"I think I'll learn a lot from this match. She's the number one player in the world right now, so I know what I need to do to get to that level," Gauff added.

"She was really attacking the ball well. She hit a lot of winners today. I didn't hit as many as I can. I think that I can trust my strokes more.

"I think she trusts her strokes a lot, so that's why she hits winners. In order to hit a winner, you have to trust that you're going to do it. I think I can work on that more.

"Other than that, I mean, I think my first serve, I could get it in more today. I was having trouble holding serve. I think once I get past that hump, I'll start to improve a lot more."

A desire for Coco Gauff to leave the court with her head held high was behind Naomi Osaka's decision to persuade the 15-year-old to stay for an interview after their US Open encounter.

Defending champion Osaka cruised to a 6-3 6-0 win over the teenager in front of a packed Arthur Ashe Stadium crowd, ending Gauff's memorable run at her home grand slam on Saturday.

However, even as Osaka eliminated the star of the first week of the tournament, the world number one won the hearts of the spectators when she was able to sway a tearful Gauff into joining her for the post-match interview.

They were each subsequently reduced to tears but received a huge ovation from the fans in an indelible moment in the history of the tournament.

Asked in her post-match media conference if her decision to have a joint-interview was instinctive, Osaka replied; "It was kind of instinctive because when I shook her hand, I saw that she was kind of tearing up a little. Then it reminded me how young she was.

"For me, at least when I lose, I just come into the locker room and I cry, then I do press, like, here. I love you guys, but it's not the greatest.

"Then I was thinking normal people don't actually watch the press conferences unless they're, like, fan fans.

"The people that are out there, they're probably going to just stay and watch the next person who's playing, then they go home, and they wouldn't know immediately what's on her mind.

"I was just thinking it would be nice for her to address the people that came and watched her play. They were cheering for her. Yeah, I mean, for me, it was just something that was, I don't know, instinctive I guess.

"For me, I just thought about what I wanted her to feel leaving the court. I wanted her to have her head high, not walk off the court sad. I want her to be aware that she's accomplished so much and she's still so young.

"I know that you guys are kind of coming at her with love, too. But I feel like the amount of media on her right now is kind of insane for her age. I just want her to, like, take care of herself."

Osaka said she was the most focused she had been since her victory at the Australian Open, and her performance reflected that.

She started the match by racing into a 3-0 lead and, after surviving a Gauff revival, never let up in dishing out a bagel in the second set.

Quizzed as to how far she is from being at a level where she can win the slam again, Osaka replied: "The thing with me, though, is I get better as the tournament goes on.

"It's not even a skill sort of thing, it's just I trust myself more."

Osaka will look to make further strides when she faces Belinda Bencic in the last 16.

Those who were hoping for Coco Gauff to deliver another thriller in her match with Naomi Osaka were left disappointed, but they did witness the most touching moment of the US Open so far.

Defending champion and world number one Osaka proved too much for Gauff as she eased to a 6-3 6-0 win over the 15-year-old American in just 65 minutes on Saturday.

It was a hugely impressive performance from Osaka, but it was what she did after the match that earned her the most acclaim at Flushing Meadows.

Despite a tearful Gauff wanting to leave the court, Osaka persuaded the teenager to stay out there so they could do the on-court interview together.

Both were then reduced to tears as they spoke in front of the Arthur Ashe crowd, who treated them to a standing ovation.

Osaka will have won plenty more admirers with that sporting gesture and will next face Belinda Bencic, who received a walkover after Anett Kontaveit withdrew from their match due to illness, for a place in the last eight.

 

TOWNSEND'S PHONE OVERWHELMED BY TEXTS

Taylor Townsend looked in danger of falling flat after her remarkable comeback against Simona Halep, going a break down in the first set in her match with another Romanian, Sorana Cirstea.

However, Townsend fought back to take the first set and, after skipping a rope at the change of ends, produced a dominant second. 

Continuing her aggressive play from the win over fourth seed Halep, Townsend came to the net 75 times in securing a 7-5 6-2 victory.

Speaking to ESPN on court afterwards, Townsend told of the increased attention she has received since defeating Wimbledon champion Halep.

"I didn't know that many people had my phone number," Townsend said. "I got a lot of messages and my phone started dialling 911 by itself."

ANDREESCU KEEPS ASHE EMOTIONS IN CHECK

Next up for Townsend will be rising star Bianca Andreescu, who kept up her outstanding run of form by beating two-time US Open runner-up Wozniacki 6-4 6-4.

Canadian Andreescu has not lost a completed match since March, having won the Rogers Cup on her return from an injury that kept her out of Wimbledon.

But she had no shortage of nerves playing on Ashe for the first time in her fledgling career.

"I was, like, Oh, my God, is this actually happening right now? It's a dream come true, so I prepared myself really well," Andreescu said. "I handled my emotions well today."


AHN: "I'VE MADE IT"

Kristie Ahn had never gone beyond the first round of a slam before this week, now she can look forward to playing in the last 16 after a three-set win over Jelena Ostapenko.

Ahn survived an injury scare to beat former French Open champion Ostapenko 6-3 7-5 and was thrilled to finally be recognised by a passer-by at Flushing Meadows after initially being mistaken for Osaka.

The 27-year-old posted on Twitter: "Story time: Was walking back from my dubs match today and heard someone yell 'It's Naomi Osaka!' Everyone started cheering and then someone goes, 'No! That's Kristie Ahn!' Y'all...I've made it."

Standing in her way as she eyes the last eight is 25th seed Elise Mertens, who defeated Petra Kvitova's conqueror Andrea Petkovic 6-3 6-3.

Seventh seed Kiki Bertens was unable to improve on her best performance in New York as she was comfortably beaten 6-2 6-3 by Julia Goerges.

Naomi Osaka ended Coco Gauff's dream US Open run with an accomplished display to defeat the 15-year-old sensation 6-3 6-0.

After capturing the imagination of the tennis world by progressing to the fourth round of Wimbledon as the All England Club's youngest qualifier, Gauff captivated the home crowds at Flushing Meadows to reach the third round and set up a dream meeting with Osaka on Arthur Ashe Stadium.

However, defending champion and world number one Osaka was always going to present a significantly greater challenge than Anna Blinkova and Timea Babos.

While Gauff looked far from daunted by the occasion, she was unable to cut out the double faults and unforced errors that were a feature of her two engrossing victories, and Osaka was much more ruthless in punishing them.

While Osaka was not quite at her best but, at the scene of her maiden grand slam triumph that was marred by Serena Williams' dispute with umpire Carlos Ramos, she looked every inch a player ready to retain her crown in more fitting circumstances.

Osaka needed only 65 minutes to set up a meeting with 13th seed Belinda Bencic in the round of 16 in New York.

The 21-year-old set out her stall right from the off, a fantastic forehand winner helping her bring up break point in the second game, on which Gauff double-faulted.

Falling 3-0 behind seemed to spark Gauff into life, though both players struggled for consistency as the set ended with four breaks in the final six games.

Osaka did a tremendous job of stretching the parameters of Gauff's movement by working the angles magnificently, but she will have been frustrated by a series of sloppy games on serve.

That run was ended as she closed the set out and Osaka refused to take her foot of the gas as she dished out a bagel in the second.

Osaka used deep drop shots to get Gauff in trouble in the opening game of the second, the Japanese pirouetting in delight after she produced outstanding reflexes at the net to bring up break point.

Gauff promptly sent down another costly double fault and there was no way back for the American after Osaka held from 15-40 down and then broke again for a 3-0 lead. 

The teenager was unable to get on the board in the second, with that fact doing a disservice to the part she played in an absorbing, albeit one-sided contest, that will surely be just the first of many more battles to come.

There were not too many questions to be asked of Rafael Nadal's game after his routine win over Hyeon Chung at the US Open, so talk instead turned to his diet.

Nadal, who swept aside Chung 6-3 6-4 6-2 to reach the fourth round at Flushing Meadows, was asked in a post-match media conference about his diet by a reporter who heard he does not eat meat or cheese.

The 18-time grand slam champion responded: "I don't eat cheese. I never eat cheese in all my life. I don't like [it].

"The meat, I eat meat when I want to eat meat. I have nothing against the meat.

"I prefer fish. That's all. But I don't have big problems with [my] diet. I eat what I want to eat. And of course the diet is important for life and to stay healthy."

There may be a rise in pescatarian diets following Nadal's comments in the wake of a dominant performance.

The Spaniard battled injury earlier this year, a hip problem forcing him out of Indian Wells and Miami.

Nadal could hardly have looked in better shape against Chung, though, and asked about his fitness, he said: "Well, honestly, the first three months of the season were very hard, too many issues again.

"And then it's true that since Barcelona, things have been improving. I was able to fix a little bit the body and play more or less with freedom of movements.

"That's given me the chance to compete at the highest level again. And the most important thing, enjoy the sport. That's the main thing in this stage of my career more than anything else.

"I don't think a lot of events remain for me this year. Just a couple. This one is one of the ones that you want to be ready [for].

"So here I am to try my best and I'm going to put my 100 per cent to try to be ready for the next round."

Rafael Nadal cruised into the fourth round of the US Open with a routine 6-3 6-4 6-2 victory over Hyeon Chung at Flushing Meadows on Saturday.

Nadal was given the benefit of a walkover in the second round after the withdrawal of Thanasi Kokkinakis and, in truth, he was never really tested by Chung on Arthur Ashe.

The three-time champion was in complete control throughout, his win setting up a last-16 clash with Marin Cilic or John Isner.

Chung had come from two sets down to beat Nadal's compatriot Fernando Verdasco in the previous round, but there were never any signs of such heroics being repeated once Nadal forged ahead.

The South Korean qualifier produced only flashes of the brilliance that saw him reach the Australian Open semi-finals in 2018, and tougher tests are sure to await Nadal as he bids to regain the trophy he last won in 2017.

Nadal struck the opening blow in the sixth game of the match as Chung sent a cross-court backhand wide. 

Chung actually hit five aces to Nadal's four, but it was one off the Spaniard's racquet that wrapped up the first set.

A scintillating forehand down the line provided Nadal with what proved the decisive break in the second set and he did not have to wait long to make inroads in the third.

The third game of the set saw Chung drag a forehand off-target as he faded badly against the physical challenge presented by Nadal, the 23-year-old having only returned from injury at the end of July.

Asked about the potential benefit of a comfortable opening week in which he has only had to play two matches, Nadal told ESPN: "You never know, last year I had some tough matches and then in the semi-finals I had to retire [against Juan Martin Del Potro].

"You never know what's better. I have a tough opponent, John Isner or Marin Cilic [in the fourth round], I need to be ready for this, I can't think further than this."

Caroline Wozniacki compared Bianca Andreescu's game to that of Kim Clijsters after losing to the Canadian rising star in the third round of the US Open.

Andreescu has enjoyed a superb year on the WTA Tour, winning titles at Indian Wells and the Canadian Open.

Before the US Open her performances had not translated into grand slam success, as the 19-year-old reached the second round at the Australian Open and French Open and did not play at Wimbledon because of a shoulder injury that forced her to abandon her Roland Garros mission.

However, she was excellent in her 6-4 6-4 defeat of 2018 Australian Open champion Wozniacki, who sees plenty of similarites between the teenager and three-time US Open champion Clijsters.

"I think the one that I can most compare her game to would probably be Kim back in the day, Clijsters," Wozniacki told a media conference. "I think because she moves well and she can stretch out and get to some balls and also play aggressive and using the angles. Obviously she prefers the forehand just like Kim.

"But she can move around the backhand and put the angle on it, so I think if I were to kind of compare to someone I know, everyone has their own style, but for me, playing her, it brings me back a little bit to when I played Kim."

Told of that comparison, Andreescu said at her media conference: "I actually looked up to her [Clijsters] a lot while I was just coming up, when I started playing tennis.

"So that's really nice to hear from other players, because I think my game is pretty similar to hers. Not as good yet."

Wozniacki received treatment on her foot at the end of the first set but it did not appear to hinder her in a competitive second set.

The Dane alleviated any concerns over that injury but lamented a year in which she has consistently battled fitness problems.

On her foot, she said: "I think I just jammed it or did something like that. I'm not sure exactly. I went to the physio just to check it out. But it's okay. It's fine.

"Obviously it wasn't the best year for me, but really, there's nothing you can do when your body sometimes doesn't cooperate.

"At this point you just have to stay positive, and I'm going to go into Asia feeling like I can play some good tennis and pull off some good shots."

Daniil Medvedev has been fined $9,000 for the unruly conduct in his US Open win over Feliciano Lopez that saw him booed by the crowd.

Medvedev was given a code violation in the first set on Friday after snatching a towel from a ball boy's hand. He responded by tossing his racket in the direction of the umpire's chair.

Unseen by the umpire, Medvedev then directed a middle-finger gesture at the crowd, with the fans inside Louis Armstrong Stadium incensed after seeing him do so on the big screen.

Medvedev was jeered throughout the contest and after he wrapped up a four-set victory in the third-round clash.

The 23-year-old Russian seemed to revel in the boos and told the crowd: "The more you do this, the more I will win."

He later told reporters his actions were brought on by the heat of the moment and said: "Hopefully I will do better next time."

Medvedev was fined $5,000 for unsportsmanlike conduct and $4,000 for a "visible obscenity", tournament officials said.

The world number five will look to put the episode behind him when he faces qualifier Dominik Koepfer on Sunday.

The 2019 film 'Diego Maradona', a documentary covering a period of the great Argentina footballer's life, brilliantly depicts the breathless intensity of life as a superstar.

Put together with behind-the-scenes Maradona footage from various sources in the late 1980s and early 1990s, the critically acclaimed picture portrays the fierce adoration of supporters, the media and more that built and broke the ex-Napoli forward.

Quite understandably, it seems everyone wanted a piece of El Diego. Quite understandably, it seems this took its toll.

THE SPOTLIGHT

Watching Coco Gauff in the aftermath of her second-round US Open win was initially adorable and then a little uncomfortable.

The 15-year-old, with five main-draw grand slam triumphs to her name already, was riding the crest of her very own wave, blushing as the crowd chanted her name and then giggling excitedly as she was reminded defending champion Naomi Osaka is up next.

It is customary for victors on the show courts to then stick around for a moment or two after the interviews to sign autographs and take pictures before quickly disappearing back to the dressing room.

Gauff went above and beyond for her fans as the camera lingered for several minutes. Teenage boys tussled over signed merchandise, others tripped over themselves to get involved in the scrum. Coco kept smiling, kept signing. Some supporters were polite and grateful, others appeared blunt and rude. Coco kept going.

Many children her age - Gauff has beaten Venus Williams but is still just a child - might be discouraged from speaking to strangers. With a security guard at her side, Coco had an army of them, like Maradona, wanting a piece of her.

THE HYPE

Even for a player long tipped for success as a junior, Gauff's introduction to women's tennis has been quite remarkable. Against Timea Babos, she showed her power, her devilish speed and a defensive showing Simona Halep would be proud of. There was nothing in her performance to suggest she cannot one day live up to the hype surrounding her.

That hype is considerable. Daniela Hantuchova, on Amazon's Flushing Meadows coverage, gushed as she assessed Gauff's display. This was a future multiple-major winner, she said. The first serve of Venus, the second serve of Serena. Wow.

Coco has been the name on everyone's lips since Wimbledon, where Serena, Roger Federer and the rest discussed her thrilling breakthrough. She traded messages with Michelle Obama. Kobe Bryant was in New York on Thursday and keen to take in the clash with Babos.

And the world's top tennis prospect has understandably capitalised on this attention as a no-doubt-lucrative New Balance deal has seen the player, her team and her family turn out in shirts and shoes adorning the slogan, "Win or lose, call me Coco". She is being readied to rule the world.

A young Maradona, likewise destined for the top, had a camera crew follow him around in the days before this was normal, recording footage intended to make him a movie star. Ultimately, this would form part of the film that concluded with the tale of his downfall.

THE WARNING

Gauff has dealt with her new status incredibly well and will, you would imagine, continue to do so as long as the coverage remains positive and she keeps performing far above the level ordinarily expected of a teenager. There appears no pressure at this stage as she defeats senior pro after senior pro.

Yet might Osaka, her next opponent, be able to offer a word of warning? The Japanese appeared at ease and content on the WTA Tour a year ago, steadily forging an impressive career but not yet a victim of the expectation that comes with success.

That all changed with victory first at the US Open and then in Melbourne. Osaka became world number one and initially hated it. "Mentally, it was way more stress and pressure than I could have imagined," she said. Sport can chew up and spit out even the most prodigious talent. 

Osaka should beat Gauff and so there will be no outrage if the American is undone. The biggest feel-good story in tennis will roll on and on, the hype growing and then eventually perhaps, too, the scrutiny.

Whether Coco reaches superstardom or falls some way short, her health and happiness must remain intact throughout her career. Others have not always found that to be the case.

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