Rafael Nadal is one win away from this third Mexican Open crown after beating Grigor Dimitrov in straight sets to advance to the Acapulco final.

Top seed Nadal was too good for Dimitrov en route to his fourth Mexican Open decider, triumphing 6-3 6-2 in convincing fashion at the ATP 500 tournament on Friday.

Nadal won the event in 2005 and 2013 and the 19-time grand slam champion has the chance to claim a hat-trick of Acapulco titles after maintaining his relentless form.

"I'm very happy. A great victory against one of the best players in the world and a good friend," Nadal said. "I think I've increased my level during the match, so it's positive for me."

Spanish star Nadal recovered from 1-2 start, reeling off four consecutive games with some powerful baseline winners to seize control against seventh seed Dimitrov.

It was a similar theme in the second set as Dimitrov broke for a 2-0 lead but that was as good as it got for the Bulgarian – Nadal going on a six-game run to close out proceedings in one hour, 41 minutes.

Awaiting world number two Nadal in the final is Taylor Fritz after the American stunned fifth seed John Isner 2-6 7-5 6-3 in a stunning comeback.

"He's playing well. He has a great serve, fantastic shots from the baseline. It's going to be a tough one," Nadal said. "I know I'm going to have to be at my best and I hope to be ready for it."

At the Chile Open, second seed Casper Ruud defeated seventh seed Federico Delbonis 7-5 7-5 to book his spot in the semi-final.

Ruud – the first Norwegian to win an ATP Tour title in Buenos Aires – will next meet third seed Albert Ramos-Vinolas, who saw off Thiago Monteiro 6-4 6-4 in Santiago.

Top seed Cristian Garin was forced to retire due to a leg injury after losing the first set 7-6 (7-1) to Thiago Seyboth Wild, while Renzo Olivo upstaged Pablo Cuevas 3-6 7-6 (7-5) 7-5.

Rafael Nadal cruised into the Mexican Open semi-finals after the top seed outclassed Kwon Soon-woo in straight sets.

Nadal was in devastating form as the 19-time grand slam champion dismantled Kwon 6-2 6-1 at the ATP 500 tournament in Acapulco on Thursday.

After crushing Miomir Kecmanovic in the last 16, Nadal continued his ruthless path through the draw at the expense of the rising South Korean in one hour, 31 minutes.

Nadal – eyeing his third Acapulco title – hit 25 winners, 11 unforced errors and saved all eight break points he faced to set up a semi-final showdown with Grigor Dimitrov.

Bulgarian Dimitrov snapped a five-match losing streak against three-time major champion Stan Wawrinka by defeating the third seed 6-4 6-4.

Dimitrov – the 2014 Mexican Open champion – had not beaten Wawrinka since 2016 but the former world number three ended his drought in one hour, 25 minutes.

"I've played quite a few times against Stan and we've practised together so many times. Between us, it's mainly a mental battle," Dimitrov said. "I had lost the past five times against him, but those losses have inspired me. Those losses helped me. Even though it hurts saying it, I'm admitting it. I wanted to stand tall tonight."

John Isner – the fifth seed – booked his spot in the semis for the second successive year with a 7-6 (7-3) 3-6 6-2 win over fellow American Tommy Paul.

Isner fired down 22 aces to set up a clash against countryman Taylor Fritz, who topped Kyle Edmund 6-4 6-3.

At the Chile Open, in-form top seed Cristian Garin extended his winning streak en route to the quarter-finals in Santiago.

Garin – the Cordoba and Rio Open champion – celebrated his 10th consecutive victory by downing Alejandro Davidovich Fokina 6-2 0-6 7-6 (7-4) at the ATP 250 event.

Fellow seeds Albert Ramos-Vinolas and Thiago Monteiro also progressed but fifth seed Juan Ignacio Londero was upstaged by wildcard Thiago Seyboth Wild 7-6 (9-7) 6-4.

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.

Jordan Thompson shocked New York Open top seed John Isner, while defending champion Reilly Opelka progressed to the quarter-finals.

Thompson overcame big-serving American Isner – who had a first-round bye – 7-6 (7-2) 6-7 (3-7) 6-3 in New York on Thursday.

Isner was playing his first match since being forced to retire from his third-round clash against Stan Wawrinka at the Australian Open due to a foot injury.

Thompson lost to Isner in last year's New York quarter-finals but the Australian turned the tables after two hours, 31 minutes.

"I'm pretty stoked about that. That was a tough match," Thompson said. "I didn't get too many looks at Isner's serve, but managed to get the one break and held onto it."

Standing in the way of Thompson and the semi-finals is Andreas Seppi.

Opelka opened his title defence by cruising past Yoshihito Nishioka 6-4 6-4 at the ATP 250 tournament.

Next up is qualifier Jason Jung, who stunned seventh seed Cameron Norrie 6-4 6-4, Kyle Edmund – the eighth seed – was too good for German Dominik Koepfer 6-2 6-4.

At the Argentina Open in Buenos Aires, Diego Schwartzman and Guido Pella moved through to the quarters on clay.

Schwartzman – the top seed – prevailed 6-3 4-6 6-2 over Federico Delbonis and second seed Guido Pella survived a marathon against Facundo Bagnis 7-6 (7-2) 6-7 (2-7) 6-4.

Fellow seeds Laslo Djere and Albert Ramos-Vinolas, however, crashed out following defeats to Juan Ignacio Londero and Pablo Cuevas.

Nick Kyrgios emerged triumphant in a dramatic five-set clash with Karen Khachanov despite struggling with a hamstring injury, booking a highly anticipated meeting with Rafael Nadal in the fourth round of the Australian Open.

After passing up match points in the third and fourth sets, home favourite Kyrgios came out on top in the longest match of his career by beating Khachanov 6-2 7-6 (7-5) 6-7 (6-8) 6-7 (7-9) 7-6 (10-8) at a raucous Melbourne Arena in four hours, 26 minutes.

Top seed Nadal beat fellow Spaniard Pablo Carreno Busta 6-1 6-2 6-4 in one hour, 38 minutes on Rod Laver Arena, while US Open runner-up Daniil Medvedev overcame Alexei Popyrin 6-4 6-3 6-2 and will face Stan Wawrinka in the last 16.

The Swiss advanced after John Isner retired while 6-4 4-1 down, with Dominic Thiem, Alexander Zverev and Gael Monfils joining him in round round four.

 

CROCKED KYRGIOS CLINGS ON

Kyrgios started confidently against Khachanov and, despite taking a medical time-out at 5-2 up in the first set, managed to edge a second-set tie-break while continuing to grip at the back of his leg.

However, he was unable to repeat the trick at the second time of asking and became increasingly frustrated as the Russian wrested control of the match away from him.

Kyrgios appeared to be struggling for motivation at points and became increasingly vocal, but he hung in to take the victory to the delight of his fervent supporters.

The Australian has a strained relationship with Nadal, who he described as "salty" after their meeting at last year's Mexican Open and impersonated after being called for a time violation while serving against Gilles Simon in round two.

Asked about going up against the 19-time major champion in his on-court interview, Kyrgios said: "Whatever happened between us he's an amazing player. I'm not even thinking about that right now, I'm thinking about my legs and getting them in an ice bath and getting some food."

 

NO STOPPING NADAL

Nadal was at his imperious best against Carreno Busta, winning 87 per cent and 78 per cent of points behind his first and second serve respectively, while also smashing 41 winners – twice as many as his opponent.

"It was my best match of the tournament so far, without a doubt. Big difference between today and the previous days. I have been serving well, starting to create damage with the forehand," said Nadal.

"Every day is a different story. But, of course, it's important to make steps forward. It's clear that today I made an important one."

Asked if he likes Kyrgios, Nadal said: "I don't know. I don't know him personally, honestly, to have a clear opinion."

 

RUBLEV ROLLS ON

Rublev started 2020 with titles at the Qatar Open and Brisbane International and has continued his fine form at Melbourne Park.

The world number 16's 2-6 7-6 (7-3) 6-4 7-6 (7-4) triumph over David Goffin was his 15th match win in succession, four of which came in the Davis Cup Finals.

Rublev had wobbles after taking big leads in both tie-breaks, but Goffin made 27 unforced errors in the last two sets to help the Russian progress to a meeting with Zverev.

Seventh seed Zverev is yet to drop a set at Melbourne Park after overcoming Fernando Verdasco 6-2 6-2 6-4.

 

"IT'S A DISGRACE"

After beating qualifier Ernests Gulbis 7-6 (7-2) 6-4 6-3 to set up a fourth-round meeting with Dominic Thiem – who overcame 29th seed Taylor Fritz 6-2 6-4 6-7 (5-7) 6-4 – Monfils refuted a report claiming excessively playing video games led to him suffering a hand injury.

"You know, as I say, it's misunderstanding with people. I say this in a funny way, to be honest, but it's a disgrace, to be honest with you, because I'm fine," Monfils told reporters in a news conference.

"I'm in the second week, playing great tennis. I think it's just someone who, I don't know, try to — you know, I played ATP Cup, was fine. I practiced here for one month. I was really fine.

"I never said I was hurt. Somehow, you know, playing PlayStation, this? Come on. And it's easy, because I think I'm a good name to make up good story like that. Now you know."

Denis Shapovalov was surprisingly beaten in straight sets by 21-year-old Ugo Humbert at the Auckland Open on Friday.

A day after first and third seeds Fabio Fognini and Karen Khachanov were knocked out, second seed Shapovalov was beaten 7-5 6-4.

Humbert, who broke serve in the final game of each set, described the win as "one of the biggest of my career" as he set up a semi-final against John Isner.

The American was taken to two tie-breaks by Kyle Edmund but prevailed 7-6 (7-5) 7-6 (7-5), his 25 aces getting him over the line as he seeks a third title in Auckland.

Benoit Paire reached his first semi-final at the event, coming from a set down to beat John Millman 3-6 6-1 6-4.

The fifth seed will face Hubert Hurkacz, who spurned six second-set match points in a mammoth tie-break before eventually seeing off Feliciano Lopez 6-4 6-7 (11-13) 6-4.

At the Adelaide International, home favourite Alex Bolt was soundly beaten by Felix Auger-Aliassime, the Canadian needing just 55 minutes to win 6-3 6-0.

He will meet Andrey Rublev in the last four after the Russian battled past Dan Evans 6-4 3-6 6-3 in just over two hours.

Spanish hopes were extinguished in the quarter-finals, where Tommy Paul surprised Albert Ramos-Vinolas to win 6-3 6-4 and Lloyd Harris beat fourth seed Pablo Carreno Busta 6-3 6-3.

An emotional Nick Kyrgios explained his motivations for donating to the effort fighting Australia's bushfires after helping his nation to victory over Germany at the ATP Cup.

Kyrgios beat Jan-Lennard Struff 6-4 7-6 (7-4) in Brisbane, sending down 20 aces after his pledge to give 200 Australian dollars to the bushfires effort for each service winner he hits in January.

Alex de Minaur – Kyrgios' team-mate at the event, who impressively came from a set down to defeat an ill-tempered Alex Zverev 4-6 7-6 (7-3) 6-2 – followed suit after Kyrgios tweeted his intention to help, while stars from other sports have also joined in.

Brisbane Heat captain Chris Lynn struck three sixes as he top-scored in his team's win over Hobart Hurricanes in the Big Bash League on Friday, with each maximum worth $250 to the recovery effort.

"I don't really care about the praise too much. I just think we've got the ability and platform to do something like that," Kyrgios told Amazon Prime when asked about the movement he inadvertently started.

"My home town is Canberra and we've got the most toxic air in the world at the moment, so it is pretty sad. It's tough."

Having appeared choked up at that point, Kyrgios added: "I just chucked up a tweet and everyone got behind it. It is bigger than tennis.

"It's going to all the families, firefighters, animals, everyone who is losing homes, losing families. It's a real thing.

Australia completed a 3-0 Group F win after Chris Guccione and John Peers beat German doubles pair Kevin Krawietz and Andreas Mies 6-3 6-4.

In the section's other match, Canada were similarly emphatic against Greece, with Denis Shapovalov winning a pair of tie-breaks to best Stefanos Tsitsipas after Felix Auger-Aliassime demolished Michail Pervolarakis 6-1 6-3.

Auger-Aliassime and Shapovalov then combined to win the doubles rubber against the same opponents, prevailing 6-2 6-3.

Great Britain and the United States both allowed leads to slip against Bulgaria and Norway respectively.

In Group C, Cameron Norrie beat world number 423 Dimitar Kuzmanov in three sets and Dan Evans made a fast start against Grigor Dimitrov to go a set up.

But Dimitrov prevailed 2-6 6-4 6-1 and he and Alexandar Lazarov triumphed after three tie-breaks against Jamie Murray and Joe Salisbury in the small hours of the Sydney morning.

Taylor Fritz beat Viktor Durasovic 6-2 6-2 and John Isner had the USA in charge of the second singles rubber when he took the opening tie break versus Casper Ruud, only for two match points and a second breaker to go against him. He eventually lost, going down 7-5 in the deciding set.

Ruud and Durasovic then recovered from dropping the first set to beat Austin Krajicek and Rajeev Ram 10-5 in a match tie-break in Perth.

Steve Darcis and David Goffin inspired Belgium to a 3-0 Group C win over Moldova, while Daniil Medvedev's 1-6 6-1-6-3 victory against Fabio Fognini helped clinch a 3-0 victory for Russia against Italy in Group D.

Novak Djokovic and Roger Federer face tricky quarter-final matches at the Shanghai Masters on Friday after the star pair battled through to the last eight.

World number one and defending champion Djokovic defeated John Isner 7-5 6-3, while second seed Federer got the better of David Goffin, earning a 7-6 (9-7) 6-4 success.

Djokovic goes on to tackle Stefanos Tsitsipas, who overcame a significant scare as he beat Hubert Hurkacz 7-5 3-6 7-6 (7-5), with Alexander Zverev up next for Federer.

German Zverev threatened to blow Andrey Rublev away after a first-set rout, but he was then made to work hard to come through 6-0 7-6 (7-4).

Daniil Medvedev, the third seed, and Dominic Thiem, the fourth seed, both won in straight sets, seeing off Vasek Pospisil and Nikoloz Basilashvili respectively.


DJOKOVIC SERVES UP A TREAT

The top seed was speaking of the threat of Isner's famous serve from the moment their last-16 clash was booked and continued to do so after his win.

But Djokovic also managed to execute his own serve as effectively as he had hoped, complementing his typically excellent defensive game to get through.

"I managed to kind of read his serve and find a good position on the return - at the end of the first set and also the beginning of the second," the Serbian said.

"I won five games in a row and that was the key - obviously having a break each set, and then I held my serve. I thought it was one of the best serving matches I've had lately."


FEDERER FLUSTERED BUT THROUGH

If Djokovic performed better than he might have expected, Federer was a little taken aback by the level of opponent Goffin, whom he thrashed in straight sets for the loss of just four games at the US Open.

"I never really felt like I had the upper hand over David today," Federer said. "I thought he did a really good job. He was so much better than at the US Open."


STILL TWO MINOR UPSETS

The top eight seeds would have made up the quarter-final line-up if not for wins by Italians Fabio Fognini and Matteo Berrettini.

Fognini, the Monte Carlo champion who made headlines for a spat with Andy Murray earlier in the week, defeated Russian Karen Khachanov 6-3 7-5.

Berrettini, who lost to Murray last week, a month on from reaching the US Open semi-finals, got the better of Roberto Bautista Agut, tying up a 7-6 (7-5) 6-4 victory.

Fognini faces Medvedev next, with Berrettini up against Thiem.

Novak Djokovic outclassed John Isner as he progressed into the quarter-finals of the Shanghai Masters with a 7-5 6-3 victory.

Defending champion Djokovic was flawless at times on Thursday in a clinical display, controlling Isner's powerful serve.

Djokovic noted he had been nursing a shoulder injury heading into the tournament, though the Serbian showed no sign of a struggle with fitness as he wrapped up a 350th ATP 1000 career win with the minimum of fuss.

It did take Djokovic until the final game of a 42-minute first set to break his opponent and, with three set points to play with, he made no mistake when he drew Isner into an overhit backhand.

That came amid a run of nine successive points for Djokovic, who swiftly hit the front in set two as he looked to snuff out any lingering chances of a  fightback from the American.

Another break followed as Djokovic raced three games clear and, though Isner regained some composure to stem the tide, he was no match for the top seed's unerring serve.

Isner positioned himself for a break when he drew back to 30-30 in the seventh game, his resolve was quickly broken by more supreme serving.

Despite a brilliant, cushioned backhand from Djokovic, Isner held his nerve to stay in the match on his next serve.

But it merely staved off the inevitable - the world number one, who is aiming for a fifth title of 2019 and will face Hubert Hurkacz or Stefanos Tsitsipas in the last eight, serving out a dominant triumph with the first of three match points.

Novak Djokovic was buoyed by his display in Wednesday's 6-3 6-3 victory over Denis Shapovalov at the Shanghai Masters.

The reigning champion overcame a potentially tricky first obstacle in his pursuit of a fifth title at the event, getting the job done in an hour and 10 minutes.

Djokovic dropped just one point on serve in the first set as he secured a last-16 clash with John Isner.

"From the beginning I was sharp, I brought the right intensity and focus on the court," said the Serbian.

"Obviously Denis has played a match before here and won it, and conditions are played fast so I think it is quite suitable to his style of the game. Big serve, big forehand.

"I was constantly there in his return games but he was just managing to pull out some great shots, especially with the serve.

"It was a crucial break, I think, at 3-2, first set. It kind of allowed me to start swinging through a bit more and stepping into his second serve.

"Second set was great, he started off much better with some break points. I was lucky to save those. Just overall a really good performance and I am very pleased."

Djokovic won the Japan Open last time out and has opted to combine his bid for singles glory with a shot at the doubles crown in China.

He and compatriot Filip Krajinovic face Jamie Murray and Neal Skupski on Thursday, with Djokovic's Isner showdown also on the agenda.

"I'm excited for both matches," he said. "Obviously John has one of the best serves in the history of tennis, so he can beat anybody if he is serving big and feeling well from the baseline and volleying well.

"I think the key is obviously how many serves I can get back in play. The more I do that, the better chance I have."

Andy Murray's hopes of making the China Open his first singles title since career-saving hip surgery are over after the Brit was swept aside 6-2 7-6 (7-3) in the quarter-finals by top seed Dominic Thiem.

Murray was featuring in his first last-eight match on the singles circuit this year and held his own for periods, but early breaks in both sets proved vital for Thiem.

The 26-year-old world number five broke Murray's serve in the very first game and generally looked untroubled when claiming the first set 6-2.

Thiem struck on his opponent's serve in the first game of the second set as well, but Murray showed spirit to fight back, breaking Thiem to level at 5-5.

But Murray's lack of consistency cost him in the tie-break, with Thiem completing victory to set up a semi-final against Karen Khachanov, who came through 3-6 6-3 6-1 against Fabio Fognini.

The other semi will be contested between Alexander Zverev and Stefanos Tsitsipas after they overcame American duo Sam Querrey and John Isner, respectively.

Second seed Zverev hammered Felix Auger-Aliassime on Thursday and, although Querrey put up a bit more of a fight, the German still progressed in straight sets, winning 7-6 (7-3) 6-2.

Tsitsipas was similarly commanding against the big-serving Isner, who had won the previous two contests including at Wimbledon 2018.

Neither broke serve in the first set, forcing a tie-break in which Tsitsipas prevailed, but the 21-year-old took charge in the second and ran out 7-6 (7-3) 6-3 victor.

Alexander Zverev followed up his thumping win over Frances Tiafoe with another resounding success against a fellow young gun as he roared past Felix Auger-Aliassime at the China Open.

After clinching Team Europe's success at the Laver Cup last month, Zverev has performed strongly in the opening rounds in Beijing, making light work of two of the most promising players in the game.

Zverev, despite a largely underwhelming season, is nudging closer to a top-eight place in the Race to London as he bids to reach the ATP Finals, where last year he stunned Novak Djokovic in the title match.

A 6-3 6-1 win over Canadian 19-year-old Auger-Aliassime is irrefutably a strong result, and for the German second seed it sets up a quarter-final against American Sam Querrey, who needed to dig deep for a 7-6 (7-2) 6-7 (6-8) 6-3 win over Argentinian Diego Schwartzman.

Greek third seed Stefanos Tsitsipas was taken the distance before getting the better of Georgian Nikoloz Basilashvili, the world number seven outlasting the 17th-ranked player 4-6 6-3 6-2 in a touch over two hours.

Next for Tsitsipas is a clash with a player he has yet to beat, John Isner, after the American won 7-6 (7-3) 7-5 against Britain's Dan Evans.

Isner fended off Tsitsipas at Wimbledon in 2018 and a year earlier in Shanghai, with four of the five sets across those two matches going to tie-breaks, a familiar pattern when the big-serving Dallas resident is in action.

Andy Murray's Zhuhai Open campaign was halted in the second round as he slipped to a 6-4 2-6 4-6 defeat against a dogged Alex De Minaur.

Murray, who edged past Tennys Sandgren on Tuesday, looked in good shape when he broke twice on his way to claiming the first set, but De Minaur recovered.

The 20-year-old Australian came out on top in some riveting rallies, with a sublime drop shot in set three a highlight as Murray's lack of match sharpness handed De Minaur the edge.

De Minaur had squandered two break points at the start of the third set, though he made no such mistake to take a 5-4 lead eight games later.

Former world number one Murray kept his chances alive with some exquisite shots, only to waste three break-back points.

Having then failed to take a first match point, De Minaur made his second one count – Murray's return into the net ending a contest lasting two hours and 42 minutes as the Australian progressed to a quarter-final with Borna Coric.

Murray will turn his focus to the China Open in Beijing as the British player continues his singles comeback following hip surgery.

Greek top seed Stefanos Tsitsipas retired due to illness prior to the third set of his encounter with France's Adrian Mannarino.

Damir Dzumhur will face Mannarino in the last eight, while second seed Roberto Bautista Agut goes up against Andreas Seppi, who saved five match points in a deciding-set tie-break en route to beating Zhizhen Zhan 7-6 (7-4) 4-6 7-6 (10-8).

Meanwhile, Chengdu Open top seed John Isner fell at his first hurdle as the American succumbed 6-7 (11-13) 7-6 (7-5) 7-6 (7-4) to Egor Gerasimov of Belarus.

Gerasimov – who will next play Denis Shapovalov – was joined in the last eight by US Open semi-finalist Grigor Dimitrov, who marked his return to action with a 7-5 7-5 victory over Britain's Dan Evans.

Canadian second seed Felix Auger-Aliassime went down 6-4 6-7 (5-7) 6-4 to Portugal's Joao Sousa, Spaniard Pablo Carreno Busta defeated Frenchman Benoit Paire, while Chile's Cristian Garin dispatched Fernando Verdasco of Spain.

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