Juan Martin del Potro was reduced to tears in what he expects to be his final tennis match as the former US Open champion bowed out of the Argentina Open.

The 33-year-old Argentinian lost 6-1 6-3 to fellow Argentinian Federico Delbonis in Buenos Aires, having come back from four rounds of knee surgery to get back on court.

He saved seven of 12 break points in a determined effort against Delbonis, but Del Potro, who had been on the injured list since June 2019, was in no shape to compete for victory over his compatriot.

One of the most popular players on the tour, who might have achieved many more great things had wrist and knee trouble not played him over the last decade, Del Potro bid an emotional farewell.

The moment got to Del Potro as he prepared to serve at 5-3 down in the second set. His emotions spilled out, with a towel failing to mask his tears as a passionate crowd rallied behind him, chanting: "Ole, ole, ole, ole, Delpo, Delpo."

A fan carried a flag bearing the message: "The Tower of Tandil keeps fighting. Thank you." Tandil is Del Potro's home city.

After the match, Del Potro said: "The truth is that this is a moment I never wanted to come. Health leads me to have to make a decision: I made too much effort in these two and a half years.

"Sometimes I can lose. I do not have the strength that everyone believes. I think I fulfilled all the dreams in tennis and the most difficult thing to achieve, which is the affection of the people.

"I feel like I've given it all. This is a day I never wanted to come, but I'm going to remember it for the rest of my life."

He was relieved to be leaving on his own terms, saying: "Now I am calm because my last match was possibly on the court and not in a press conference. I will always remember this."

Del Potro, whose US Open triumph came when he beat Roger Federer in a sensational 2009 final, has accepted a wildcard to the upcoming Rio Open, but he signalled he is unlikely to now take that up.

"Yes, I was planning to go to Rio," he said, quoted by La Nacion. "But... I think I already gave everything until the last point."

Del Potro was an Olympic silver medallist in 2016, beaten in the Rio final by Andy Murray, and later in the same year he helped Argentina win the Davis Cup.

It was fitting that Delbonis, who won the decisive rubber against Croatia after Del Potro was victorious in both his singles matches, was the man on the other side of the net on Tuesday. He and Del Potro shared a long, affectionate hug at the net at the end of the match.

Del Potro's mother, Patricia, was among those in the crowd. The ATP said it was the first time she had attended one of his matches. She was pictured embracing her son off court after the match ended.

Other matches happened in Buenos Aires on Tuesday too, a highlight being Brazilian Thiago Monteiro's 6-3 6-3 win over seventh seed Albert Ramos-Vinolas.

At the Dallas Open, first-round winners included Jack Sock, Jordan Thompson and Liam Broady.

Serbian fifth seed Dusan Lajovic fought back from a set down to triumph over Benoit Paire in the Argentina Open first round while Spanish veteran Fernando Verdasco also progressed on Monday.

Lajovic, who is currently ranked 37th in the world, beat 50th-ranked Paire 4-6 6-4 7-6 (7-3) in just over two hours in Buenos Aires.

In a tight match, the Serbian got the edge in the third-set tiebreak as his first serve seldom let him down.

Former top 10 player Verdasco, now 38-years-old, defeated Bolivian Hugo Dellien 6-4 3-6 6-1 in two hours and two minutes.

Serbian eighth seed Laslo Dere got past compatriot Miomir Kecmanovic 6-4 1-6 6-1, while Argentine pair Federico Coria and Francisco Cerundolo also progressed.

Meanwhile at the Dallas Open, veteran South African Kevin Anderson proved too good for Sam Querrey 6-4 6-4.

The 35-year-old former US Open and Wimbledon finalist sent down 21 aces as he won in little over an hour.

Emerging American Brandon Nakashima defeated Australian John Millman 7-5 7-6 (7-3) in the first round.

Hubert Hurkacz bounced back from a disappointing Australian Open campaign with a straight-sets win over Jo-Wilfried Tsonga at the ABN AMRO World Tennis Tournament in Rotterdam.

Fourth seed Hurkacz, who was beaten in the second round in Melbourne by Adrian Mannarino, saw off wildcard Tsonga 6-4 7-6 (9-7) in one hour and 32 minutes.

"Jo is an amazing player and competitor," Hurkacz said of the former world number five.

"He brought a really high level and it was a really tough match for me and he is definitely on the way back.

"Jo has achieved so much in his career and playing against him you can see why with his shots and his serve. I appreciated playing him and I am happy with the win today."

World number 11 Hurkacz will face either Lorenzo Musetti or Mikael Ymer in the second round.

Sixth seed Cameron Norrie overcame Ugo Humbert 6-2 6-4, while eighth seed Nikoloz Basilashvili was dumped out by American Mackenzie McDonald 6-3 6-2.

McDonald will face Alex de Minaur in the next round after the Australian swatted aside David Goffin 6-0 6-3.

"I think I played really well," De Minaur said. "I played exactly how I wanted to. My coach and I set up a plan about how we wanted to play this match and I managed to execute it.

"It is a very good feeling. Mentally I thought I was very solid and positive and that is one of the main aspects I am trying to focus on this year."

Albert Ramos Vinolas has fought back from a set down and a final-set double break down to win the Cordoba Open over Chilean qualifier Alejandro Tabilo on Sunday.

Spanish Sixth seed Ramos Vinolas won 4-6 6-3 6-4 in two hours and 40 minutes to claim his fourth career title.

The 34-year-old, who is ranked 44th in the world, trailed 4-1 in the third set, down two breaks but rallied back to win the next five games to clinch victory.

Tabilo had knocked out top seed Diego Schwartzman in the semi-finals and looked on course for victory after winning the first set when he sent down five aces.

The Chilean got a break ahead in both the second and third sets but could not hold his composure under pressure.

Ramos Vinolas was excellent on his return in the third set converting three of four break points, with the tiring Tabilo failing to have any aces in the deciding set.

The Spaniard, whose last title was in Estoril in 2021, improves to 4-7 in Finals at the ATP Level.

Alexander Bublik claimed his first ATP Tour title with a stunning straight-sets victory over Alexander Zverev in the Open Sud de France final.

The 24-year-old went into Sunday's match without a career win over a top-five opponent and having lost two finals in a career-best season in 2021.

He was not to be denied this time, however, powering his way to a 6-4 6-3 win over the world number three in Montpellier in just one hour and 10 minutes.

The Kazakhstani lost just four points behind his first serve throughout the match, the only blip coming when he handed Zverev a break back to love after moving 3-2 ahead in the first set.

After regaining the advantage, Bublik survived two more break points before closing out the opener and the pressure only increased on the Zverev serve in the second set.

Bublik broke to love to lead 3-2 and again in the final game as Zverev's resistance wilted.

He can now look forward to rising to a career-high place in the rankings when the updated list is published on Monday.

Joao Sousa won his first ATP Tour title since 2018 as he defeated Emil Ruusuvuori in the final of the Tata Open Maharashtra in Pune on Sunday.

Ruusuvuori initially gave a good account of himself in his first final on the tour, but he was ultimately blown away in the final set as Sousa won 7-6 (11-9) 4-6 6-1.

After sealing the first set in a tense tie-break, Sousa appeared set to cruise to victory when an early break in the second had him 3-0 up.

But Ruusuvuori then won five games in a row at 4-1 down to fight back brilliantly and force a decider.

Sousa had too much for him in the end, however, an early break in the third set seeing momentum shift the 32-year-old's way and give him the boost he needed to claim a first title since winning on home soil in Estoril in May 2018.

Andy Murray has decided to skip the entire clay court season, including the French Open, as he feels the surface aggravated "issues" in the past.

Former world number one Murray has endured a torrid time with injuries in the past few years, but he has featured more regularly since the second half of last season.

While he only made it as far as the second round at last month's Australian Open, his preparation for the year's opening grand slam saw him reach a first final on the ATP Tour since October 2019.

He lost to Aslan Karatsev in the decider of the Sydney Classic, going down 6-3 6-3, but the Scot's run to the final provided evidence he still has plenty to offer.

Murray will not be playing in the next grand slam, though.

The eyes of the tennis world will be on Roland Garros in late May and early June, but Murray is opting to miss that and every other event on clay for fear of worsening his condition, with Wimbledon scheduled to begin on June 27.

"Right now, I am not planning on playing through the clay," the three-time grand slam winner said.

"The past couple of years, the clay has made issues worse; last year I had some issues at the beginning of the year, the clay didn't help, so I've spoken to my team about that and this year while I feel good and healthy, I don't want to take that risk.

"It's not that I wouldn't potentially play on clay in the future. Last year I almost missed Wimbledon, was close to not playing the grass season. I'm not planning on playing the clay. I will still try to compete a bit during that period, I won't do nothing, that's my plan just now.

"I had a busy end of last year and the next couple of months I won't take any risks and hopefully get a good build up to the grass season."

Murray parted ways with long-term coach Jamie Delgado in December and then decided against making Jan de Witt a permanent member of his team following a trial period leading up to and through the Australian Open.

The 34-year-old is now once again working with Dani Vallverdu, Stan Wawrinka's coach, having teamed up with him between 2010 and 2014.

But Murray accepts the situation is far from ideal, with Vallverdu only available while Wawrinka continues his rehabilitation from a foot injury that has kept him out since March last year.

"It's not been easy to find someone," Murray added.

"Obviously, Stan Wawrinka has been rehabbing for quite a long time and is hopefully coming back to the tour, but he agreed for Dani to come and work with me for a few weeks over the next month or so, which is great for me in the short term, but still trying to find a longer-term solution.

"It's not that straightforward, I'm not as in demand as a few years ago. Ultimately, I want it to be the right person. I'm aware there's no perfect setup, but medium, longer term I want some stability and will try and get that in the next few weeks."

Qualifier Alejandro Tabilo stunned top seed Diego Schwartzman to progress to his first ATP Tour final at the Cordoba Open.

Schwartzman, the world number 14, had been hoping to win a title on home soil in Argentina for the second time in his career.

But his Chilean opponent continued his remarkable run with a 6-3 7-6 (8-6) upset, the world number 144 now having won 12 successive sets at the tournament stretching back to qualifying.

Tabilo only won his first title on the Challenger Tour in November but has carried that momentum through into 2022.

"I've been playing my best tennis for a few months now and I finished the year strong," said Tabilo.

"I think I just needed one of these weeks to kind of click and get going. Hopefully this is the start of something good, and hopefully I can keep this level."

Tabilo will face Albert Ramos-Vinolas in the final after the Spaniard beat another home hope in Juan Ignacio Londero.

Ramos-Vinolas prevailed 7-6 (7-4) 6-4, surpassing his own expectations after a first-round exit at the Australian Open.

"When I came here after Australia, I didn't expect to be in the final, to be honest," he said.

"I was not playing my best. The pre-season [I worked] very hard but the feeling was not very good.

"Now I'm in the final. The only thing I can do is try to fight as much as I can."

Alexander Zverev will face Alexander Bublik in the Open Sud de France final after easing to victory over Mikael Ymer on Saturday.

The top seed is seeking a 20th tour-level title and has yet to drop a set in his three matches in Montpellier after beating Bublik 6-1 6-3.

Ymer eliminated Gael Monfils and Richard Gasquet en route to the semi-finals, but the world number 83 struggled against Zverev in his third straight loss to the German. 

Zverev was triumphant in his last appearance in this tournament five years ago and is the strong favourite heading into Sunday's final with Bublik.

"I am in the final and I am happy about that," Zverev said in his on-court interview. "I played a pretty good match. I think I played one bad game in the whole match. 

"Overall I am happy to be in another final, playing against Alex who I have known since I was 12 years old, so hopefully it will be a fun match."

Bublik also claimed a routine win in his semi-final against Filip Krajinovic, the sixth seed prevailing 6-4 6-2 in a little over an hour.

The 24-year-old is through to his fifth ATP Tour final, having most recently gone all the way at the Singapore Open last February, where he lost to Alexei Popyrin.

At the Tata Open Maharashtra, Mikael's older brother Elias Ymer squandered three match points to lose 5-7 7-6 (7-4) 7-5 to Joao Sousa in Pune.

The Swedish qualifier had defied the odds to make it to the semi-finals and took the opening set against Sousa, before recovering from 4-1 down to level up the second set 4-4.

But Sousa edged the tie-break and survived three match points in the 10th game of the deciding set, which he would go on to win.

Sousa will face Emil Ruusuvuori in Sunday's final after the world number 87 overcame Kamil Majchrzak 6-3 7-6 (7-0) earlier in the day.

It marks the first tour final that Ruusuvuori has reached, while Sousa is in the hunt for a fourth title at this level.

Diego Schwartzman survived a scare from lucky loser Daniel Elahi Galan to reach the semi-finals of the Cordoba Open.

Top seed Schwartzman lost the first set to this Colombian opponent, but recovered to prevail 3-6 6-0 7-5.

Yet the Argentine still had to battle to clinch the decisive set, dropping serve when attempting to wrap up the match at 5-3.

He recovered from that setback and is just two wins away from his second title on home soil, having won in Buenos Aires last year.

Schwartzman will face qualifier Alejandro Tabilo in the last four.

Albert Ramos-Vinolas, seeded sixth, beat fourth seed Lorenzo Sonego in straight sets to book his place in the semis, where he will face Juan Ignacio Londero.

Alexander Zverev breezed into the semi-finals of the Open Sud de France by beating home favourite Adrian Mannarino for the loss of just one game.

The world number three needed just 50 minutes to swat aside Mannarino 6-1 6-0 to set up a last-four match with Mikael Ymer.

Champion at this event in 2017, Zverev's record in Montpellier moved to 9-1 and he has now won seven matches in a row against Mannarino.

Ymer, the world number 83, squandered one match point in his contest with Richard Gasquet but eventually came through 7-5 6-7 (6-8) 6-1.

The best entertainment came in the earlier match between Alexander Bublik and Roberto Bautista Agut, sixth seed Bublik eventually coming through 6-4 2-6 7-6 (7-4) after just over two hours on court.

He will face Filip Krajinovic for a place in the final, the Serbian having beaten Damir Dzumhur in straight sets.

At the Tata Open Maharashtra, rising Italian star Lorenzo Musetti was surprised by world number 95 Kamil Majchrzak.

The Pole, who defeated Musetti's compatriot Andreas Seppi at the Australian Open in straight sets, won 6-2 6-7 (5-7) 6-4 to set up a semi-final against Emil Ruusuvuori.

The other semi-final sees Joao Sousa, into the last four at Tour level for the first time since St Petersburg in 2019, face Elias Ymer.

 "I think I played a great match," said Sousa after beating Daniel Altmaier in straight sets. "I was very solid. I knew it was going to be a tough match, so I was prepared to run a lot."

Sebastian Baez stunned world number 18 Cristian Garin in three sets to reach the last eight at the Cordoba Open, his first career ATP Tour quarter-final.

Baez took a set off Stefanos Tsitsipas – his first ever top-10 opponent – before losing at the Australian Open, but he has kicked on again in Argentina.

The 21-year-old faced a huge uphill battle when he fell a set behind to third seed Garin, who won in Cordoba in 2020.

However, Baez roared back in quite remarkable fashion to prevail 4-6 6-1 6-1 in perhaps the best result of his career – and one of his opponent's worst.

"It was a pretty bad match, one of the worst of my career in terms of feeling," Garin said. "He deserves it as well, but I feel like I wasn't up to it.

"I had a regular first set and then I couldn't find myself. The little adaptation I had was clear, I was slow. It was one of my worst matches in many years."

Baez faces Alejandro Tabilo next after his last-16 defeat of Carlos Taberner, but a tricky field remains as the two seeds in action besides Garin on Thursday both won.

The reward for Lorenzo Sonego and Albert Ramos-Vinolas is a match against one another on Friday.

Top seed Alexander Zverev returned to winning ways after a surprise fourth-round Australian Open exit when he won his first match at the Open Sud de France on Thursday.

The German world number three was bounced out at Melbourne Park by Denis Shapovalov in straight sets, but he navigated his way safely past Mackenzie McDonald to reach the quarter-finals in Montpellier.

A largely dominant Zverev won 6-2 7-6 (7-5) to set up a clash with Adrian Mannarino in the last eight, and the 24-year-old highlighted how important he felt it was to quickly get back in the swing of things after disappointment in Melbourne.

"I'm going to give myself the best chance to do well in this tournament. But obviously, I'm happy to be back here," he said of the tournament he won in 2017.

"This is a place I really enjoy coming back [to]. After the Australian Open that I had, I wanted to play tournaments before my scheduled tournaments in Acapulco, Indian Wells and Miami. I said Montpellier is the perfect fit for that, and I'm happy to be here."

The same cannot be said for Gael Monfils, who suffered a crushing 6-1 6-2 defeat to Mikael Ymer on home soil.

The Swede was practically flawless throughout, winning a whopping 83 per cent of points on first serve and 89 per cent on second, with Monfils never even sniffing out a single opportunity to break back.

Richard Gasquet is a force to be reckoned with in Montpellier and reached another quarter-final, seeing off South Korean's Kwon Soon-woo 7-5 6-4.

Frenchman Gasquet reached six consecutive finals in Montpellier while in his prime years, being crowned champion in 2013, 2015 and 2016, and finishing runner-up in 2014, 2017 and 2018. Now 35, his last quarter-final appearance in an ATP main tour event came in August at Winston-Salem.

Gasquet's fellow Frenchman Mannarino sank the hopes of defending champion David Goffin, scoring a sparkling 6-4 6-2 victory.

Fourth seed Nikoloz Basilashvili, who lost twice to Andy Murray in Australia last month, this time fell to world number 152 Damir Dzumhur of Bosnia-Herzegovina, sliding to a 6-1 5-7 6-2 defeat. Basilashvili, the world number 21, now has a record of played five, lost five, for the 2022 season.

At the Tata Open Maharashtra in Pune, there was a surprise defeat for Russian top seed Aslan Karatsev. Karatsev won a title in Sydney last month before losing to Mannarino in the third round of the Australian Open, and in his first match since that disappointment he slumped 6-2 7-6 (7-3) to Swedish qualifier Elias Ymer.

Three seeds joined Ymer in the quarter-finals, with Jiri Vesely, Emil Ruusuvuori and Stefano Travaglia all making smooth progress without dropping a set. Vesely faces Ruusuvuori on Friday, while Travaglia awaits Ymer.

Rafael Nadal and Roger Federer will combine for Team Europe in this year's Laver Cup.

Nadal became the record holder for men's singles grand slam titles on Sunday, as he came from two sets down to beat Daniil Medvedev in the final of the Australian Open.

Federer, who like Novak Djokovic has 20 grand slam titles to his name, has not featured since losing to Hubert Hurkacz in the quarter-finals at Wimbledon last year.

The Swiss star is recovering from a knee injury and chose to sit out the season's first major in Melbourne.

However, injury permitting, the great rivals will team up to represent Team Europe in London in September.

Europe have won the last four editions of the tournament, though neither Nadal nor Federer featured in 2021.

"The Laver Cup is such a unique event and I've loved competing in it," said Nadal, who has played in the competition on two occasions previously.

"I suggested to Roger we should play doubles together in London and he seems keen, so now we just need to persuade our captain Bjorn [Borg].

"Roger has been a huge part of my career, a big rival and also a true friend. To be part of Team Europe together is great and if we're able to possibly share the court one more time as a doubles pairing then this would be a truly special experience for us both at this stage in our careers."

Federer added: "I'm really looking forward to getting back into competition later this year and Laver Cup is very much part of my plan.

"It's no secret that I love the event and I'm super excited to be returning to The O2 and to London, one of the greatest cities in the world.

"Rafa is an incredible person and an inspiration to me and countless others around the world. He messaged me on social media after the Laver Cup in Boston last year suggesting we play doubles in London and I am definitely up for a Laver Cup 'Fedal' comeback!"

Federer and Nadal have only teamed up for a doubles match once before – in the inaugural Laver Cup back in 2017.

They beat American duo Jack Sock and Sam Querrey in three sets.

Daniil Medvedev and Jannik Sinner have been replaced by Andy Murray and Jo-Wilfried Tsonga in the upcoming Rotterdam Open.

World number two Medvedev lost a thrilling five-set Australian Open final to Rafael Nadal on Sunday and does not feel ready to compete in the Netherlands.

The Russian explained his decision in a statement on Thursday, while Sinner has had to pull out due to COVID-19.

"Unfortunately I will not play in Rotterdam this year," Medvedev said. 

"I just got back from Australia and am not ready to compete. Rotterdam is one of the favourite stops. I look forward to coming back in the future."

Roberto Bautista Agut and Borna Coric had already pulled out of the competition. Tournament director Richard Krajicek has confirmed that Murray and Tsonga, who won the event in 2009 and 2017 respectively, will now take part as wild cards.

Andrey Rublev is the reigning champion in Rotterdam after beating Marton Fucsovics in last year's final.