Daniil Medvedev has confirmed he will undergo a procedure to fix a troubling hernia issue, which may keep him out of the French Open.

Medvedev, who enjoyed a short-lived stint as world number one at the start of March before relinquishing the crown back to Novak Djokovic, reached the quarter-finals at Roland Garros last year.

However, the chances of the Russian appearing in Paris now seem slim, given he faces up to two months out of action following the impending operation.

This year's French Open runs from May 22 until June 5.

"Hi everyone," the world number two tweeted on Saturday. "The last months I have been playing with a small hernia.

"Together with my team I have decided to have a small procedure done to fix the problem. I will likely be out for the next 1-2 months and will work hard to be back on court soon. Thanks for all the support."

Medvedev had been hoping to use the clay court swing to reclaim top spot in the ATP rankings.

He could have done so had he reached the semi-finals of the Miami Open last week, yet the 26-year-old lost 7-6 (9-7) 6-3 in the quarters to Hubert Hurkacz.

Medvedev appeared to be struggling in that tie and after the defeat he told reporters: "All the match I was not feeling my best. But, you know, sometimes it happens.

"I don't know the actual reason. Maybe the heat. But I was feeling super, like, dizzy, tired, and there was this long game where I couldn't serve anymore.

"Then in the locker room I was cramping quite much, so physically was not easy. But at the same time, that's part of the game."

Should Medvedev fail to return in time to make the season's second grand slam, the reigning US Open champion will hope to be fully firing by the time Wimbledon comes around in late June.

Daniil Medvedev missed the chance to return to the top of the rankings as he was beaten by Hubert Hurkacz in the quarter-finals of the Miami Open on Thursday.

Medvedev would have become world number one once again if he had defeated Hurkacz, but the defending champion won 7-6 (9-7) 6-3 on Hard Rock Stadium.

Novak Djokovic will remain the top-ranked male player on the planet thanks to Pole Hurkacz, who levelled his head-to-head record with the Russian at 2-2.

Carlos Alcaraz or Miomir Kecmanovic will do battle with eighth seed Hurkacz, who won 74 per cent of points on his first serve and broke Medvedev's serve three times, for a place in the final.

Hurkacz's win over the top seed was his second against a top-two player, with the first also coming against Medvedev at Wimbledon last year.

"I think the return was crucial. I was able to make a lot of returns and get some free points on my serve, because having rallies with Daniil is fun, but they get long,” Hurkacz said on his on-court interview.

"It is good I was able to get some free points. I have spent a lot of time in Florida, so I am used to the humidity. I think the conditions were in my favour today, so I tried to use them."

Casper Ruud set up a semi-final with Francisco Cerundolo at the Miami Masters after he defeated Alexander Zverev 6-3 1-6 6-3 on Wednesday.

Ruud's heavy topspin game gave Zverev problems initially, contributing to a 94 per cent success rate from points on his first serve, while Zverev struggled to find rhythm on serve at 58 per cent.

Saving two break points in the opening game of the second seemed to spark Zverev into life, but Ruud was able to regroup and continue dominating from the baseline in the third to comfortably see his way through.

"It was great to get that break early on [in the third set] and I was able to keep it all the way out," Ruud said post-match. "I was serving well. I can thank my serving for the win today."

The Norweigian world number eight lost his first three ATP 1000 quarter-finals on hard court, but played with confidence on the back of a 75 per cent first-serve rate.

He will face Cerundolo, who also advanced into the semi-finals on Wednesday, after Jannik Sinner was forced to retire due to foot blisters. The Argentine was leading 4-1 in the first set after 23 minutes when Sinner called the match.

The world number 103 held a 0-2 record on hard courts prior to this week, but has now made his first ATP 1000 semi-final in as many attempts after progressing past Tallon Griekspoor, Reilly Opelka, Gael Monfils and Frances Tiafoe.

Cerundolo has enjoyed a strong start to 2022, with respective quarter-final and semi-final appearances on clay in Buenos Aires and Rio de Janeiro.

The winner of the upcoming semi-final will make their first ATP 1000 final appearance, while Ruud was able to beat Zverev at third time of asking, losing the opening two games head-to-head.

Dominic Thiem's bad luck continued as the former world number three confirmed he has tested positive for COVID-19.

Thiem only made his return to action on Tuesday, having not featured on the ATP Tour since June last year.

The Austrian underwent surgery on a wrist injury that kept him out of Wimbledon and also prevented him from defending his US Open title, while he also missed this year's Australian Open.

Having opted to push back his comeback further by skipping Indian Wells and the Miami Open, Thiem instead decided to play at the Challenger Tour's Andalucia Open.

His return was short-lived, as Thiem went down 6-3 6-4 to Pedro Cachin.

And Thiem will now face another spell out, after revealing he has contracted coronavirus.

"Looks like lately the good news don't last long... last night after dinner, I started feeling unwell and didn't have a good night," Thiem wrote on his official Instagram account.

"After developing mild symptoms I decided to take a test this morning, which came back positive for COVID-19.

"Now I have to wait and see how it develops. I'll keep you posted. Thank you all in advance for your support!"

Former US Open champion Dominic Thiem made his long-awaited return from a wrist injury on Tuesday, but lost 3-6 4-6 to Pedro Cachin at an ATP Challenger event in Marbella.

Thiem, the former world number three who hasn't played since 2021, started slowly and fell 5-0 behind in the first set against the world number 228.

He improved in the second set but was not able to recover from dropping serve in the first game.

"Obviously, the result today is the bitter part," Thiem posted on his Instagram. "I would have wanted to win, and I have to accept the defeat in a humble manner.

"This is only the beginning of a long way to the top of my game."

Emerging Spanish star Carlos Alcaraz continued his rise with a 7-5 6-3 upset of third seed Stefanos Tsitsipas to reach the Miami Masters quarter-finals on Tuesday.

The 18-year-old, who reached last year's US Open final eight after beating Tsitsipas in the third round, proved too good again for the Greek in one hour and 50 minutes.

Alcaraz reached last week's Indian Wells semi-finals and is now 15-2 on the season, with the win setting up a clash with Serbian Miomir Kecmanovic who upset last week's Indian Wells champion Taylor Fritz 3-6 6-1 6-4.

Tsitsipas broke the Spaniard in the sixth game and led 5-2 before Alcaraz reeled off seven straight games to sensationally take the first set.

Alcaraz surged ahead in the second set, with his defence and speed leaving Tsitsipas short on answers.

The Spaniard, who saved seven of eight break points throughout the match, converted his fourth match point for victory.

"It was really, really tough. He was playing unbelievable," Alcaraz said after the match. "All I can say is I fought until the last ball in the first set [to] come back."

Ninth seed Jannik Sinner won 7-6 (7-3) 6-3 over enigmatic Australian Nick Kyrgios, who had a furious outburst directed at umpire Carlos Bernardes.

The Australian was heard to label Bernardes "an absolute clown" and continued to berate the umpire late in the first set, leading to a code violation and two penalties.

Kyrgios completely lost his cool, demanding to speak to a tournament official before smashing his racquet early in the second set, leading to a game penalty as well.

Sinner will next take on Argentine Francisco Cerundolo after he defeated 28th seed Francis Tiafoe lost 6-7 (2-7) 7-6 (7-3) 6-2.

Top seed Daniil Medvedev made light work of Jenson Brooksby 7-5 6-1 to set up a quarter-final showdown with reigning champion Hubert Hurkacz who won 7-6 (7-3) 6-2 over Lloyd Harris. Medvedev will return to the top of the ATP rankings if he wins their quarter-final.

Second seed Alexander Zverev got past Thanasi Kokkinakis 6-4 6-4 and will meet sixth seed Casper Ruud in the last eight, after the Norwegian won 6-3 6-4 over Briton Cameron Norrie.

Nick Kyrgios called on the ATP Tour to "get new people" after a furious outburst at the umpire in his defeat to Jannik Sinner at the Miami Open.

Kyrgios berated umpire Carlos Bernardes after his walkie-talkie went off mid-point during the first set.

The Australian was heard to label Bernardes "an absolute clown".

He subsequently added: "This is one of the biggest tournaments and you guys can't do your job. It's embarrassing.”

"You wonder why no one watches this sport. It's a laughing stock."

After receiving a code violation for an audible obscenity, Kyrgios was then handed a point penalty for unsportsmanlike conduct in the first set tie-break.

Kyrgios had been appearing to talk with a friend in attendance courtside, with that penalty further infuriating him.

"What's unsportsmanlike? What is unsportsmanlike?" Kyrgios asked of Bernardes.

He then demanded to see a tournament official before smashing his racquet during the opening game of the second set, an action that saw him cop a game penalty and drop his serve.

Sinner maintained the initiative from there, easing to a 7-6 (7-3) 6-3 win, with Kyrgios' mind clearly still focused on the performance of the official even after the dust had settled.

He posted on Twitter: "'You could do the job of the umpire' - what was said to my best friend that got me 'unsportsmanlike code violation' at 5-3 in the first set tie break.

"With 100 of thousands of dollars on the line that was the decision he made because the umpire's feelings got hurt. GET NEW PEOPLE"

The Miami Masters' top seed, Daniil Medvedev, had no problems making his way past Spain's Pedro Martinez 6-3 6-4 to earn his spot in the fourth round.

Serving was the story of the match as the world number two tallied up 14 aces to his unseeded opponent's zero, and only allowed Martinez to see five second serves in the opening set, with Zverev winning all five. Overall, Zverev won 20 of 24 points on serve in the first set.

The second set was more competitive, with Martinez even breaking back after Zverev jumped ahead and looked to coast to victory, but he could not hold off the Russian down the stretch.

Medvedev will play American Jenson Brooksby in his fourth-round matchup after he won a hard-fought 6-3 5-7 6-4 struggle against 15 seed Roberto Bautista Agut.

In a razor-close contest, Brooksby was just slightly better throughout, winning 60 per cent of his service points compared to the Spaniard's 59 per cent, as well as winning 41 per cent of return points compared to Bautista Agut's 40 per cent.

Fresh off his Indian Wells Masters triumph over Rafael Nadal, Taylor Fritz kept his good form going with a 7-6 (7-2) 6-4 win against American compatriot Tommy Paul.

Fritz, who is now up to world number 13, did not have his serve broken all day, winning 81 per cent of his successful first serves (30-37), while also capitalising on the only two break points he saw.

14 seed Carlos Alcaraz only needed two sets to get past 21 seed Marin Cilic 6-4 6-4, creating nine break point opportunities to Cilic's one, which was saved.

In the late session, and in a meeting of rapidly rising prospects, 22-year-old Serbian Miomir Kecmanovic pulled off an upset 7-6 (7-4) 6-3 win over 21-year-old American Sebastian Korda.

Meanwhile, three seed Stefano Tsitsipas was too much for Australian Alex de Minaur, winning 6-4 6-3 after allowing no break point opportunities in the opening set, and saving all three in the second.

Ivan Lendl insists Andy Murray can still compete for grand slam titles after re-joining the Scot's coaching team for a third time.

Lendl has teamed up with Murray in order to prepare the two-time Wimbledon champion for his home grand slam this summer, with the 34-year-old skipping the clay-court season to enhance his chances of being at his best on the grass.

Murray won all three of his grand slam titles, Wimbledon in 2013 and 2016, and the US Open in 2012, under Lendl's guidance, but has not reached a grand slam quarter-final since 2017, undergoing two hip surgeries during that time.

Lendl, who himself won eight grand slams during a glittering playing career, cited Rafael Nadal's victory in January's Australian Open as evidence that class remains permanent, and expressed confidence in Murray's ability to follow his lead.

"You are asking this [whether Murray can compete] with a straight face after what Rafa [Nadal] has done in Australia," Lendl said after watching Murray's second-round defeat to Daniil Medvedev in Miami.

"They are just like bulldogs, and they want to do things because they haven't been done before.

"If they set their mind to it then they can achieve amazing things.

"Rafa said he wasn't even sure he's going to be able to play again [after his own injury problems], then he goes and wins the Australian Open. So yes, these guys can do it.

"I would say grass is probably Andy's best surface. 

"[For] a lot of the players, it's their worst surface. That would obviously increase his chances." 

Murray made his first ATP final since 2019 earlier this year, losing in straight sets to Aslan Karatsev in the final of the Sydney International in January, and is 85th in the ATP world rankings.

Jannik Sinner saved multiple match points for the second straight match on Sunday, advancing to the last-16 at the Miami Masters.

After saving three in his opening match against Emil Ruusuvuoiri, the 20-year-old Italian denied Pablo Carreno Busta five times to eventually win 5-7 7-5 7-5.

A Miami finalist in 2021, the Italian was 5-4 down in the second set before winning 11 consecutive points to force a third frame.

Down a break before breaking-to-love in the third, Sinner was fearless with his ground strokes with the game on the line, moving to 5-0 in deciding sets for 2022.

He will face Nick Kyrgios, who continued his strong start to the year with a 6-2 6-4 win over Fabio Fognini.

Taking only 61 minutes to advance after defeating world number seven Andrey Rublev in straight sets in his opening match, Kyrgios hit 24 winners and only lost eight points on serve.

The Australian wildcard and Sinner were supposed to meet at Indian Wells earlier this year, but the latter had to withdraw due to illness.

Fellow unseeded Australian Thanasi Kokkinakis advanced past Denis Kudla, while Francisco Cerundolo upset Gael Monfils.

In the late result on Sunday, Alexander Zverev was a comfortable 6-2 6-2 winner over Mackenzie McDonald.

The German second seed put McDonald under immediate pressure with his return of service, winning 13 of 22 points on the American's second serve.

Meanwhile, Cameron Norrie and Casper Ruud saw their way through in straight sets.

Nick Kyrgios has defended Emma Raducanu amid a wave of recent criticism following the US Open champion's early exit from the Miami Open.

Raducanu was beaten by Katerina Siniakova in her first match in Miami this week after being given a bye into the second round.

She has won only four WTA Tour matches since sensationally becoming the first qualifier – male or female – to win a major in the Open Era at Flushing Meadows in September.

The 19-year-old has been in demand off the court, having last week announced she will be a brand ambassador for Porsche, but her business activities have attracted criticism.
 
Speaking after Raducanu's defeat to Siniakova, former world number five Daniela Hantuchova claimed the Briton has lost the locker room respect she had previously built up.

Kim Clijsters took aim at those who act as though they have "made it", meanwhile, though the four-time major winner did not mention Raducanu by name when making those comments.

Raducanu defended herself from the "unfair" accusations and Kyrgios has now questioned why former players have felt the need to take aim at the youngster.

"What’s with old retired players giving their opinion on our stars now?" he posted on Twitter, referencing a video uploaded by Andy Roddick on how players can curtail their anger.

"I love A-rod and I agree we all need to chill with the rackets and all that, but geezus.

"I read an article about a past female player talking about Radacanu, no offence, but she is a far, far bigger name already."

Andy Murray and Daniil Medvedev both know they could have done things better in Saturday's match, though it was the Russian who progressed with relative ease from the tie.

Medvedev, who enjoyed a short-lived stay as world number one earlier in March, defeated three-time grand slam winner Murray 6-4 6-2 to reach the third round of the Miami Open.

Murray beat Federico Delbonis in his first-round match but the former world number one has not won two successive games in a tournament since January, when he went all the way to the final in Sydney.

The crowd was largely on Murray's side in Saturday's contest yet Medvedev hardly felt the pressure. Indeed, the 26-year-old did not offer up a single break point throughout.

Nevertheless, Medvedev saw scope for development in his game, though was still able to reflect on a relatively routine victory.

"I think it was a great match. It's never easy, even if you practice on the same courts for one or two months, it's never going to be the same as a competitive tournament match," said Medvedev, who is top seed in Miami.

"So I'm happy that I managed to have zero break points against me. I feel like I have some room for improvement, but it was a great match against an amazing player and I'm happy that I managed to go through.

"On the days when you serve good, your opponent doesn't have this freedom to return, it helps you.

"[In the] second set, the scoreline was easier, it was much tougher in the beginning, but when your opponent knows you're probably going to get some aces and it's not going to be easy for him to return, he gets pressure on his serve and many times that is what happens in close matches.

"Every opportunity I had I tried to take it, to go for it, and there were a lot of moments when I was happy about my game."

Murray, on the other hand, acknowledged he is simply not yet at a level where he can expect to outlast the world's best players.

"My level of tennis is obviously not right now where it needs to be to win matches like that," the 34-year-old told reporters.

"Today there were some good signs on the court but the two key things in tennis are serve and return. I didn't do either of them particularly well."

Fifth seed Andrey Rublev has been eliminated from the Miami Open in the second round in straight sets by wild card world number 102 Nick Kyrgios on Friday.

The enigmatic Australian triumphed 6-3 6-0 in 52 minutes to clinch a third round clash with Italian Fabio Fognini, who won in three sets against Japanese Taro Daniel.

The victory marks Kyrgios' third win over a top 10 opponent in the past two tournaments, having topped both Casper Ruud and Jannik Sinner at Indian Wells earlier this month.

Rublev had won titles in Marseille and Dubai earlier this season but was not allowed to settle by Kyrgios who sent down 10-5 aces and had a first serve percentage of 80 per cent.

"I know that he's a player who relies on a bit of rhythm, so I just tried to keep the points short and sharp, just play aggressive," Kyrgios said after the match.

"I'm just happy with my performance, whether it's 7-6 in the third or something like this, I'm just happy to get through."

Second seed Alexander Zverev was made to work for victory against Croatian Borna Coric, winning 6-4 3-6 6-3 in two hours and one minute.

The win marks the 2018 Miami Open runner-up's first triumph at the event since that run to the final.

Sixth seed Ruud eased past Henri Laaksonen 6-1 6-2, while ninth seed Sinner defeated Emil Ruusuvuori 6-4 3-6 7-6 (10-8) in two hours and 40 minutes.

Several seeds were beaten included 13th seed Diego Schwartzman who went down 4-6 7-6 (7-3) 6-4 to Thanasi Kokkinakis. Seeds Lorenzo Sonego, Grigor Dimitrov, Reilly Opelka and John Isner also exited.

Gael Monfils defeated Oscar Otte 7-6 (11-9) 6-1, Pablo Carreno Busta won 6-3 6-2 over David Goffin and 10th seed Cameron Norrie won 7-6 (7-5) 6-4 over Jack Draper.

Daniil Medvedev will have to go through two-time Miami Open champion Andy Murray to quickly reclaim the world number one ranking.

Medvedev's first stint at the top of the ATP rankings ended swiftly when he lost in the third round at the Indian Wells Masters and was displaced by Novak Djokovic.

But the Russian has the opportunity to leapfrog Djokovic once more by making the semi-finals in Miami.

Before thinking about the latter stages of the Masters 1000 tournament, however, Medvedev first must master Murray, who looked in good nick on his return to Miami.

Murray has twice won this tournament but has not played it since 2016, meaning Thursday's match against Federico Delbonis was his Hard Rock Stadium debut.

Delbonis had won the pair's only prior meeting yet was outclassed 7-6 (7-4) 6-1 after a steady first set.

Medvedev and Murray have also only met once before now, with the world number two coming out on top, but the wild card is looking forward to the challenge.

"It's a big challenge for me, a big test," Murray said. "I've got a big training block after this tournament and it'll be a really good test for where my game's at and the things I need to work on as well against him. I'm looking forward to that."

That is not the only mouthwatering second-round tie, with Nick Kyrgios through to face Andrey Rublev.

However, Stefanos Tsitsipas has a slightly more straightforward task on paper after qualifier J.J. Wolf advanced past Daniel Altmaier.