Top seed Rafael Nadal advanced to the Mexican Open quarter-finals in straight sets, while Alexander Zverev was a shock casualty.

Nadal – playing his first competitive tournament since the Australian Open – produced some highlight moments as he saw off Miomir Kecmanovic 6-2 7-5 in Acapulco on Wednesday.

A two-time winner of the ATP 500 event, world number two Nadal was a class above against his Serbian opponent to stay on course for the title.

After his powerful display, the 19-time grand slam champion will face Kwon Soon-woo for a spot in the semi-finals after the South African beat eighth seed Dusan Lajovic 7-6 (7-2) 6-0.

Australian Open semi-finalist Zverev was bundled out of the tournament by American qualifier Tommy Paul 6-3 6-4.

Zverev dropped his opening service game and it was a sign of things to come for the German star as Paul capitalised to eventually claim the biggest win of his career.

Next up for 22-year-old Paul is fifth seed John Isner, who downed fellow American Marcos Giron 6-3 7-6 (7-4).

Grigor Dimitrov saved two match points as he prevailed 6-7 (8-10) 6-2 7-6 (7-2) against Adrian Mannarino in a thriller.

Mannarino erased Dimitrov's 4-1 lead in the final set to earn a pair of match points but the Bulgarian rallied to set up a showdown with third seed Stan Wawrinka, who eased past Pedro Martinez 6-4 6-4.

Elsewhere, fourth seed Felix Auger-Aliassime was surprised 6-4 6-4 by Kyle Edmund and Taylor Fritz topped Ugo Humbert 6-4 6-1.

At the Chile Open in Santiago, seeds Casper Ruud, Hugo Dellien and Federico Delbonis all moved through to the quarters but Pablo Cuevas fell to qualifier Renzo Olivo.

Top seed Rafael Nadal advanced to the Mexican Open quarter-finals in straight sets, while Alexander Zverev was a shock casualty.

Nadal – playing his first competitive tournament since the Australian Open – produced some highlight moments as he saw off Miomir Kecmanovic 6-2 7-5 in Acapulco on Wednesday.

A two-time winner of the ATP 500 event, world number two Nadal was a class above against his Serbian opponent to stay on course for the title.

After his powerful display, the 19-time grand slam champion will face Kwon Soon-woo for a spot in the semi-finals after the South African beat eighth seed Dusan Lajovic 7-6 (7-2) 6-0.

Australian Open semi-finalist Zverev was bundled out of the tournament by American qualifier Tommy Paul 6-3 6-4.

Zverev dropped his opening service game and it was a sign of things to come for the German star as Paul capitalised to eventually claim the biggest win of his career.

Next up for 22-year-old Paul is fifth seed John Isner, who downed fellow American Marcos Giron 6-3 7-6 (7-4).

Grigor Dimitrov saved two match points as he prevailed 6-7 (8-10) 6-2 7-6 (7-2) against Adrian Mannarino in a thriller.

Mannarino erased Dimitrov's 4-1 lead in the final set to earn a pair of match points but the Bulgarian rallied to set up a showdown with third seed Stan Wawrinka, who eased past Pedro Martinez 6-4 6-4.

Elsewhere, fourth seed Felix Auger-Aliassime was surprised 6-4 6-4 by Kyle Edmund and Taylor Fritz topped Ugo Humbert 6-4 6-1.

At the Chile Open in Santiago, seeds Casper Ruud, Hugo Dellien and Federico Delbonis all moved through to the quarters but Pablo Cuevas fell to qualifier Renzo Olivo.

Top seed Rafael Nadal advanced to the Mexican Open quarter-finals in straight sets, while Alexander Zverev was a shock casualty.

Nadal – playing his first competitive tournament since the Australian Open – produced some highlight moments as he saw off Miomir Kecmanovic 6-2 7-5 in Acapulco on Wednesday.

A two-time winner of the ATP 500 event, world number two Nadal was a class above against his Serbian opponent to stay on course for the title.

After his powerful display, the 19-time grand slam champion will face Kwon Soon-woo for a spot in the semi-finals after the South African beat eighth seed Dusan Lajovic 7-6 (7-2) 6-0.

Australian Open semi-finalist Zverev was bundled out of the tournament by American qualifier Tommy Paul 6-3 6-4.

Zverev dropped his opening service game and it was a sign of things to come for the German star as Paul capitalised to eventually claim the biggest win of his career.

Next up for 22-year-old Paul is fifth seed John Isner, who downed fellow American Marcos Giron 6-3 7-6 (7-4).

Grigor Dimitrov saved two match points as he prevailed 6-7 (8-10) 6-2 7-6 (7-2) against Adrian Mannarino in a thriller.

Mannarino erased Dimitrov's 4-1 lead in the final set to earn a pair of match points but the Bulgarian rallied to set up a showdown with third seed Stan Wawrinka, who eased past Pedro Martinez 6-4 6-4.

Elsewhere, fourth seed Felix Auger-Aliassime was surprised 6-4 6-4 by Kyle Edmund and Taylor Fritz topped Ugo Humbert 6-4 6-1.

At the Chile Open in Santiago, seeds Casper Ruud, Hugo Dellien and Federico Delbonis all moved through to the quarters but Pablo Cuevas fell to qualifier Renzo Olivo.

Novak Djokovic talked up the quality of the "powerful" Karen Khachanov after he and the Russian booked a quarter-final meeting at the Dubai Tennis Championship. 

After dominating his first-round encounter against Malek Jaziri in one hour, Djokovic won a similarly straightforward contest with Philipp Kohlschreiber 6-3 6-1 in just 59 minutes on Wednesday.

In the build-up, Djokovic had pointed to his loss against Kohlschreiber at Indian Wells last year on the previous occasion they had met on a hard court as evidence he was facing a big test.

But the Serbian triumphed without facing a break point, hitting 23 winners and just 10 unforced errors in improving his 2020 record to 15-0.

Khachanov, who has won one of his three meetings with Djokovic, moved through after seeing off Dennis Novak 6-3 6-4.

"I've had some interesting battles with him," Djokovic said of Khachanov. "He is a great guy, a very powerful player. 

"He is one of the guys who is a pretender to be top five, top 10. He is very dedicated, so hopefully I'll be as sharp as I have been in the past two matches and start well."

Djokovic felt he had barely put a foot wrong against Kohlschreiber, who at 36-years-old is now ranked at number 80.

"It was a great performance," said the Australian Open champion. "I enjoyed the way I played, coming out with the right focus and tactics. 

"Knowing Philipp beat me 12 months ago in Indian Wells, I needed to approach this match very seriously regardless of his ranking."

Second seed Stefanos Tsitsipas joined Djokovic in the quarter-finals at the ATP 500 event, beating Alexander Bublik – a player he also got the better of en route to Open 13 Marseille glory last week - 7-6 (7-1) 6-4.

Tsitsipas will now play Jan-Lennard Struff, who defeated Nikoloz Basilashvili.

Andrey Rublev saw off Filip Krajinovic 7-6 (7-3) 6-0 to book a clash with Dan Evans, who was on the brink of elimination but saved three match points in a thriller against Pierre-Hugues Herbert, eventually winning 7-5 3-6 7-6 (9-7).

Richard Gasquet eliminated fellow Frenchman and eighth seed Benoit Paire 6-4 6-4, while in-form Gael Monfils was a comfortable 6-1 6-2 winner over Yasutaka Uchiyama.

Novak Djokovic paid tribute to "inspirational" Maria Sharapova after the five-time grand slam champion retired from tennis on Wednesday.

Sharapova has struggled with injuries in recent years, while she also served a 15-month ban after testing positive for meldonium at the 2016 Australian Open.

The Russian, who was a major winner aged 17 at Wimbledon in 2004, wrote in Vogue and Vanity Fair: "I'm new to this, so please forgive me. Tennis — I'm saying goodbye."

And ATP Tour great Djokovic, speaking on court after his straight-sets defeat of Philipp Kohlschreiber at the Dubai Tennis Championships, prompted a round of applause in honour of Sharapova after learning of her retirement.

"I just heard the news right now, and I would like everyone to give her a big round of applause for everything she has done in her career," he said. "She deserves it definitely.

"She is a great fighter, as dedicated as someone can really be in our sport.

"The willpower and the willingness to overcome all the obstacles that she had - especially in the last five or six years with the injuries and surgeries, trying to come back to the court and play on her desired level - it's truly inspirational to see. She has the mind of a champion.

"I'm sorry that it had to end with an injury but, at the same time, she had a fantastic career. She can be proud of herself."

Djokovic's ATP rival Stefanos Tsitsipas - also victorious in Dubai on Wednesday - even suggested other players had been jealous of Sharapova.

"I come from a Russian background, so I kind of understand the way she approached tennis, the attitude and all of that," the Greek said. "I watched her play when I was young.

"I remember her winning the Wimbledon title, I don't know how old she was – 20, 17, unbelievable. She had a really good career, I can tell you.

"I think many people are jealous of the career she had. Obviously she was behind Serena, another great athlete, so I would say after Serena, she's probably the best.

"She had a really good career with great victories, great achievements in tennis. I think she added a lot to our sport."

Nick Kyrgios hit out at fans after being booed off court following his decision to retire against Ugo Humbert at the Mexican Open.

Kyrgios was the defending champion in Acapulco but lasted just one set - losing it 6-3 - before opting to quit due to a troublesome wrist injury.

The announcement did not go down well with fans who roundly jeered the Australian as he gathered his belongings and left the arena.

Kyrgios was unapologetic afterwards and felt he did not deserve the criticism that came his way.

Asked about the boos, he told reporters: "I couldn't give a f***. I literally couldn't give a f***.

"I'm not healthy. I tried to come here, I tried to play. I've been doing media for the tournament and helping out.

"I tried to play, I tried to give the fans a little bit of tennis and they're disrespectful.

"I honestly just really couldn't give a f***."

Kyrgios has had a solid start to 2020, helping Australia reach the semi-finals of the inaugural ATP Cup before going down in four sets to Rafael Nadal in the last 16 at the Australian Open.

He was forced to pull out of the Delray Beach Open last week due to the wrist problem, however.

"I've been dealing with a bit of a wrist injury, obviously, for the last couple of weeks," he added.

"After the Australian Open I took a week and a half off and then I started hitting again, I started feeling my wrist."

Rafael Nadal and Alexander Zverev moved through at the Mexican Open, while Nick Kyrgios was booed as his title defence came to an end.

A two-time champion of the event, top seed Nadal cruised past Spanish compatriot Pablo Andujar 6-3 6-2 on Tuesday.

In competitive action for the first time since the Australian Open, Nadal needed just 90 minutes to post his fourth victory in as many meetings with Andujar.

Zverev, the second seed at the ATP 500 tournament, survived an early battle before getting past Jason Jung 7-6 (8-6) 6-1.

Last year's runner-up, Zverev served 12 aces and broke four times in his victory.

Kyrgios beat Zverev in the final in 2019, but the Australian lasted just 31 minutes in the first round.

Ugo Humbert took the first set 6-3 when Kyrgios retired due to a wrist injury, the 24-year-old receiving some boos as he left the court.

Kyrgios was the only seed to fall as Felix Auger-Aliassime, John Isner, Grigor Dimitrov and Dusan Lajovic advanced at the hard-court tournament.

Taylor Fritz, Pedro Martinez and Kwon Soon-woo were also among the winners.

At the Chile Open in Santiago, seeds Juan Ignacio Londero, Federico Delbonis and Thiago Monteiro all got through their first-round matches.

Andy Murray revealed he may need another operation as his hip injury again threatens to end his career.

The British three-time grand slam champion last played at the 2019 Davis Cup Finals, where he suffered a pelvic injury.

Murray, 32, is now facing further surgery due to heterotopic ossification, which is bone growing outside the normal skeleton, a complication after the hip operation he underwent in January 2019.

"What I need to do is build up in these next couple of weeks to really test it. I will really test the hip out. Hopefully it responds fine, but if it doesn't then I need to potentially have that removed," he told UK media, via The Guardian.

"I can't have it removed until it is finished growing. I am now pretty much at 13 months since the operation last January, so I would hope in this period while I am building up and trying to basically test it out, I should know by the end of next month whether I'm good to play or not with it.

"If they can't get to it with an arthroscope, I would have to be opened up again. That takes longer to recover.

"It's not like a major operation to have it removed but, if they cannot get there with an arthroscope to remove it, that is the issue."

Surgery could see Murray miss Wimbledon and the Tokyo Olympics, although the Scot is eager to continue playing.

"I do want to keep playing. Whether I'm able to or not is the question," he said.

Still, there is the possibility Murray will make his return next month at the Miami Open, which begins on March 25.

"I might be playing in the next few weeks – that's what I hope – but, over the last couple of years, I have become quite pessimistic about timeframes, issues and stuff because of what has gone on, and what has been said to me," he said.

"I don't want to say I will definitely be in Miami playing. There is also the possibility I might have to have something done. We'll just have to see."

Stefanos Tsitsipas cruised into the second round of the Dubai Tennis Championships with a defeat of Pablo Carreno Busta and Benoit Paire gained revenge over Marin Cilic on Tuesday.

Tsitsipas claimed his first title of the season by retaining his Open 13 Marseille on Sunday and saw off Carreno Busta 7-6 (7-1) 6-1 two days later.

The second seed put the Spaniard under pressure with rasping returns and was broken just the once to set up a meeting with Alexander Bublik.

Paire saved four match points in a 2-6 7-5 7-6 (7-1) win over 2014 US Open champion Cilic and will face compatriot Richard Gasquet in round two.

Cilic knocked the Frenchman out of the Australian Open in the second round last month, but fell at the first hurdle in the United Arab Emirates.

Paire had lost five consecutive matches against the powerful Croatian, including a five-set battle at Melbourne Park, yet he fended off two match points in the second set and as many in third before bossing a decisive tie-break.

World number 37 Dan Evans claimed the scalp of fourth seed Fabio Fognini, winning 3-6 6-4 7-5 on day two of the tournament.

Fifth seed Roberto Bautista Agut was another to suffer a surpise exit as he went down 7-6 (7-2) 7-5 to Jan-Lennard Struff.

Yasutaka Uchiyama, Filip Krajinovic, Pierre-Hugues Herbert and Nikoloz Basilashvili were also first-round winners.

 

Stan Wawrinka was forced into a huge battle before advancing in the Mexican Open first round on Monday.

Wawrinka, the third seed at the ATP 500 event in Acapulco, needed two hours, 45 minutes to edge Frances Tiafoe 6-3 6-7 (4-7) 7-6 (7-1).

The Swiss three-time grand slam champion squandered four match points before battling through.

Wawrinka was the only seed in action on Monday, as two American qualifiers – Tommy Paul and Marcos Giron – progressed.

Adrian Mannarino overcame wildcard Cameron Norrie 2-6 6-3 6-3, Miomir Kecmanovic edged past Alex de Minaur 3-6 6-4 6-3 and Kyle Edmund hammered Feliciano Lopez 6-4 6-1.

At the Chile Open, sixth seed Hugo Dellien got through the first round, while Roberto Carballes Baena and wildcards Thiago Seyboth Wild and Marcelo Tomas Barrios Vera also won.

Reilly Opelka overcame both Milos Raonic and Yoshihito Nishioka on Sunday to triumph at the Delray Beach Open.

With Saturday's play affected by rain, the big-serving American had only hours to prepare for the final after an impressive defeat of Raonic in 127 hard-hitting minutes.

Opelka edged the ace count 19 to 16 and also saved a match point against the Canadian in their semi-final, eventually coming out on top 4-6 7-6 (8-6) 6-3.

The world number 54 broke Raonic for the first time at 3-3 in the final set and then again to love to book his place in the final, where he showed no signs of tiredness when seizing the initiative by claiming the third of three set points to forge ahead against Nishioka.

However, Nishioka's return game began to click into gear and he levelled the match when Opelka sent a forehand long to lose a tense tie-break.

An immediate break put Opelka in charge of the decider, though, and he moved 5-2 up when a furious Nishioka sent a backhand wide having previously saved three break points.

Opelka secured his second ATP Tour title with a 27th ace, once again prevailing in a three-set tussle.

Cristian Garin continued his tremendous form on Sunday, winning the Rio Open final against Gianluca Mager.

The Chilean third seed proved too good for qualifier Mager in the decider, winning 7-6 (7-3) 7-5 after one hour, 34 minutes on the clay in Brazil.

The title win was the fourth of Garin's career and second this month, adding to his Cordoba Open success.

But it was his first at ATP 500 level, having earlier beaten fifth seed Borna Coric in the semi-finals.

Mager, who needed almost three hours to win his semi over Attila Balazs, recovered from a break down in the first set before being edged in a tie-break.

The Italian started the second set well, going a break up and appearing set to force a decider.

But Garin came from 5-3 down, winning 16 of the last 20 points and four straight games to clinch the title.

Stefanos Tsitsipas sealed a stunning defence of his Open 13 Marseille title as he crushed the hopes of Felix Auger-Aliassime.

The brilliant Greek has endured a rocky start to 2020 but put a run of early-tournament defeats behind him with another success in the south of France, beating Canadian Auger-Aliassime 6-3 6-4 in the final.

It means that for the second yet in a row, Tsitsipas has run through the Marseille draw without dropping a set, while for Auger-Aliassime the wait for a first ATP singles trophy goes on.

This setback makes it five defeats in five finals for the 19-year-old Canadian, including a loss to Gael Monfils in Rotterdam last weekend.

Tsitsipas was highly impressive and the 21-year-old roared in delight when Auger-Aliassime ripped a forehand over the baseline on match point.

The trophy presentation became a charming love-in between two of the stars of the new generation in the men's game.

Addressing Auger-Aliassime, who held a 2-1 lead in their head-to-head before this clash, Tsitsipas said: "It's great to be fighting on the court against you.

"I feel like you make me a better a player. And I hope I make you that too.

"I would like to congratulate you on a great week. Someone had to win the title - it was a very close match.

"I've been following you, even when you've not been playing the same tournaments as me.

"Keep putting in the extra work and I'm sure you can achieve a lot of things in the future which will be very good for our sport and for the younger generations."

It was a fifth tour title for Tsitsipas, and it seems only a matter of time before Auger-Aliassime begins carrying off the big trophies.

These two could contest many more finals in the years ahead.

Auger-Aliassime said: "We've known each other since juniors. It's getting tougher and tougher to play you - we're equal now - two wins each - so it's a great rivalry and a great fight every time against you, but congrats for this one."

Gianluca Mager upset Dominic Thiem and then moved within reach of a maiden ATP Tour final as rain continued to impact the Rio Open.

Down a set when forced off on Friday, top seed Thiem failed to stave off a quarter-final loss once play resumed on Saturday.

Italian qualifier Mager turned his overnight advantage into a 7-6 (7-4) 7-5 victory before again taking to the court later in the day for his semi-final.

The 25-year-old's opponent, lucky loser Attila Balazs, earlier beat Pedro Martinez 2-6 6-4 6-2 but was left clinging onto a place in the tournament when the rain returned, the Hungarian trailing 7-6 (7-4) 3-3 against Mager.

The winner will likely face Cristian Garin in the final after the Chilean third seed opened up a 6-4 4-4 lead over Borna Coric in the other postponed semi-final.

Poor conditions also interrupted the Delray Beach Open, where Milos Raonic was unable to get underway against Reilly Opelka.

The big servers had their semi-final rescheduled for Sunday and will compete for a spot in the decider against Yoshihito Nishioka, who battled from a set down to defeat Ugo Humbert 1-6 6-4 6-0.

Nishioka has reached the final despite dropping the opener in three of his four matches at the ATP 250 event.

"After the first set I just figured out how to play against him and just kept trying to do it and then it worked," he said, as quoted by the ATP Tour.

"If I lose the first set it's okay, I just figure out how he's going to play, how I have to play against him and then from the second set I say, 'Okay, let's do it this way.'"

Felix Auger-Aliassime is into a second successive ATP Tour final after seeing off Gilles Simon in straight sets in the Open 13 Marseille semi-final and he will face defending champion Stefanos Tsitsipas for the title.

Second seed Tsitsipas was in impressive form as he dispatched Alexander Bublik in the day's first match, running out 7-5 6-3 victor to reach the final of the tournament for a second year in a row.

The Greek continued his run of not dropping a set at the competition since a first-round defeat to Nicolas Mahut two years ago, racking up a 14th successive win in Marseille.

Tsitsipas was particularly devastating on his own serve in the second set, dropping just a single point, and he was delighted to be able to keep Bublik under control.

"I tried to stay in the match as much as possible and play each point individually," he said, according to quotes on the ATP Tour website. "I know he can be [Bublik] quite unexpected.

"You don't know what to expect. I didn't know what to expect from today's opponent. I am really happy with myself that I found a balance and I didn't panic when things got tight.

"That is a great attitude that I put out on the court. It keeps getting better and better."

Auger-Aliassime will be hoping to go one better than he did in Rotterdam last week, having lost in the final of that event to Gael Monfils.

The Canadian did not have it all his own way against Simon, who eliminated top second Daniil Medvedev in the last round, but Auger-Aliassime showed admirable resilience to claim a double break in the first set after losing his own serve early on.

Simon took the second set to a tie-break, but he rarely appeared to be in the conversation at that stage, with Auger-Aliassime eventually winning 7-5 7-6 (7-2).

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