Top seed Pablo Carreno Busta led a clean sweep for home players to head up an all-Spanish semi-final slate at the Andalucia Open, where teenage sensation Carlos Alcaraz made history.

Carreno Busta demolished seventh seed Soonwoo Kwon 6-4 6-0, while Casper Ruud was stunned in straight sets by wildcard Alcaraz.

The 17-year-old backed up his victory over the veteran Feliciano Lopez in style, becoming the youngest ATP Tour semi-finalist since Alexander Zverev at Hamburg in 2014 with a 6-2 6-4 win.

Albert Ramos-Vinolas will face Carreno Busta after beating Norbert Gombos 6-7 (4-7) 7-5 6-4, while Alcarez is next on the agenda for compatriot Jaume Munar, who was taken the distance by Ilya Ivashka having overcome second seed Fabio Fognini on Thursday.

Taylor Fritz continued his solid form this season with a straight sets victory over Aljaz Bedene to reach the semi-finals of Sardegna Open.

Fritz is playing as the US number one for the first time in Cagliari this week and he made light work of Bedene, prevailing 6-3 6-4 to book a showdown with third seed Lorenzo Sonego, who beat Yannick Hanfmann 3-6 7-6 (8-6) 6-3 despite being 3-5 down in the second.

Seeded second and ranked 30 in the world, Fitz improved his 2021 record to 11-5 and will look to avenge a defeat in his only other meeting with Sonego on clay, when he lost at Roland Garros last year.

Lorenzo Musetti thrilled as he saved four match points to sink top seed Dan Evans on Thursday but bowed out after another epic, losing to Serbia's Laslo Djere 6-4 4-6 6-2 in two hours and 21 minutes.

Djere, who beat sixth seen John Millman en route to the quarter-finals, will face Nikoloz Basilashvili after the battle between seeds four and five ended 7-5 4-6 6-3 in the Georgian's favour.

The French Open will take place a week later than initially scheduled this year, a move aimed at increasing the possibility of spectators attending the event in Paris.

Action at Roland Garros was due to begin with qualifying on May 17, reverting back to a more traditional time in the tennis calendar after taking place last year in September and October.

That move was made due to the impact of the coronavirus pandemic, taking place after the US Open while Wimbledon was cancelled.

With France currently in a third nationwide lockdown as part of measures to slow the rise in COVID-19 cases, the ATP and WTA Tours released a joint statement on Thursday confirming the main draw at Roland Garros will now begin on May 30 instead.

"Tennis has required an agile approach to the calendar over the past 12 months in order to manage the challenges of the pandemic, and this continues to be the case," the statement read.

"The decision to delay the start of Roland Garros by one week has been made in the context of recently heightened COVID-19 restrictions in France, with the additional time improving the likelihood of enhanced conditions and ability to welcome fans at the event.

"Both the ATP and WTA are working in consultation with all parties impacted by the postponement to optimise the calendar for players, tournaments and fans, in the lead-up to and following Roland Garros.

"Further updates will be communicated in due course."

Rafael Nadal is the defending men's champion, the Spaniard having secured the clay-court title for a 13th time in 2020. However, there was a new winner in the women's tournament, Iga Swiatek of Poland defeating Sofia Kenin in the final.

A statement released from the Grand Slam Board backed the move to postpone the French Open, while also announcing the grass-court season will be reduced by one week as a consequence.

"All four grand slam tournaments are united in their view on the importance of a meaningful build-up to every grand slam, to provide players of all competitive levels with appropriate opportunities to practice, prepare and compete on the relevant surface," a statement released via Wimbledon's official website read.

"It was for this reason that the grand slams, together with the Tours, were supportive of changes to the calendar to create an enhanced grass-court season of three weeks between Roland Garros and the Championships from 2015 onwards. It is widely agreed that this change has been very successfully received.

"However, given the considerable challenges ahead of the FFT in staging Roland Garros, and to avoid further impact on the rest of the calendar, the grass-court season will be reduced by one week in 2021."

Wimbledon will remain as planned, the main draw beginning on June 28 with qualifying taking place the week beforehand.

Pablo Carreno Busta got his quest to win a maiden ATP Tour title in his homeland under way with a straight-sets defeat of Mario Vilella Martinez in the Andalucia Open.

Top seed Carreno Busta needed an hour and 38 minutes to dispatch his fellow Spaniard 7-6 (7-2) 6-3 in Marbella on Wednesday.

Carreno Busta won 73 per cent of points on his first serve and saved the only two break points he faced to set up a quarter-final against Soonwoo Kwon, who beat Facundo Bagnis 6-1 6-3.

Albert Ramos-Vinolas was another home contender to progress, getting the better of Ricardas Berankis 6-3 4-6 6-3, while Norbert Gombos ousted eighth seed Federico Delbonis 5-7 7-6 (7-4) 7-6 (7-1).

There were no surprises in the Sardegna Open, where all three seeds in action moved into the last eight.

Taylor Fritz, the second seed, saw the back of Andrej Martin 6-2 7-6 (7-4) to set up a meeting with Aljaz Bedene, who beat Egor Gerasimov 6-4 7-6 (7-5).

Fifth seed Jan-Lennard Struff needed only 81 minutes to defeat qualifier Liam Broady 6-4 6-2, while Nikoloz Basilashvili rallied from a set – and five match points – down to see off Jozef Kovalik 4-6 6-4 7-5.

Two teenagers lit up the ATP Tour on Tuesday as Lorenzo Musetti raced through at the Sardegna Open and Carlos Alcaraz advanced in Marbella.

Musetti, 19, produced arguably the standout result of the day as he dismantled Dennis Novak, wrapping up a 6-1 6-0 win in just 53 minutes.

"It was an incredible match," said Musetti, who has been in impressive form of late and moved to 6-2 for the year.

The Italian reached the last four in Acapulco, where ninth-ranked Diego Schwartzmann fell at his racket.

He added on Tuesday: "From the beginning, I felt so comfortable on the court and hitting the ball. I had really good feelings."

Musetti will face top seed Dan Evans next in Cagliari, where Jan-Lennard Struff had to save five match points before finally seeing off Joao Sousa.

None of the seeds followed Monday losers Guido Pella and Tommy Paul out of the tournament, as John Millman also triumphed. Gilles Simon shook off Stefano Travaglia.

At the Andalucia Open, 17-year-old Alcaraz insisted he still saw room for improvement despite setting up an exciting meeting with veteran compatriot Feliciano Lopez.

Sixth seed Lopez, who turns 40 in September and made his professional bow six years before Alcaraz was born, will be wary of the threat of the self-critical prospect, a 7-6 (7-3) 6-3 winner against Nikola Milojevic.

"I have played a great match and above all I have been with a very high intensity from the beginning to the end," wildcard Alcaraz said, quoted on the ATP website.

"If I had to give myself a grade, it would be a nine [out of 10], because you can always play better."

Lopez defeated Taro Daniel, while number five seed Alejandro Davidovich Fokina came from behind to beat Damir Dzumhur 6-7 (1-7) 6-2 6-2.

Next month's French Open could be postponed amid the ongoing coronavirus pandemic, according to France's minister of sports.

France entered its third national lockdown on Saturday in a bid to halt another surge of COVID-19 cases, which had threatened to overwhelm hospitals across the country. 

Professional sporting events are largely exempt from the restrictions, but minister of sports Roxana Maracineanu has suggested the French Open could be put back from its scheduled May 23 start date.

"We are in discussions with them [the French Tennis Federation] to see if we should change the date to coincide with a possible resumption of all sports and major events," she told radio station France Info.

"Today, although high-level sport has been preserved, we try to limit the risks of clusters, of spreading the virus within professional sports."

Rafael Nadal won last year's French Open, which was postponed by four months, to pull level with Roger Federer's record of 20 grand slam titles.

Jannik Sinner followed in the footsteps of three all-time tennis greats as he became the fourth teenager in history to reach a men's singles final at the Miami Open.

The 19-year-old Italian hit three huge backhand winners to break serve in the final game as he pulled off a 5-7 6-4 6-4 victory over Spain's Roberto Bautista Agut in their last-four clash.

It means Sinner matches Andre Agassi, Rafael Nadal and Novak Djokovic - players who went on to be ranked number one in the world - in becoming a finalist at the Masters 1000 tournament while still in his teens.

The hotly tipped world number 31 will contest a final at this level for the first time in his career on Sunday, awaiting the winner of the second semi-final between Andrey Rublev and Hubert Hurkacz.

Sinner said of his feat: "It sounds incredible. I'm very, very happy about today because obviously being the first semi-final it's not easy to play, especially on a Masters event, and playing against a very, very solid player in Roberto.

"We had a tough battle two weeks ago, and coming out as a winner today it means a lot to me."

Sinner also won that previous match, another tight three-setter, in Dubai.

Speaking on Amazon Prime, he explained how he recovered from a slow start to win the Miami tussle.

"In the beginning I think we were both a little bit tight and then we both played a little bit better," Sinner said.

"Today was not easy, it was a little bit windy, and in the end I tried to serve better and try to move him a little bit more, try to mix it up a little bit, and that was the key today.

"He was serving a few second serves in the last game and I just tried to go for it and even if I lost the game I was 5-5, so I was up in the score and it was the right decision."

Agassi, in 1990, and Djokovic, in 2007, were both teenage champions at the event, beating Stefan Edberg and Guillermo Canas respectively in the title matches.

Nadal lost to Roger Federer in the 2005 final, with the Swiss coming from two sets down to win what was then a five-set finale to the tournament. It has since gone back to being a best-of-three match.

Sinner may have benefited from Nadal, Djokovic and Federer electing to skip this year's tournament, but many believe he has the potential to follow them to the very top of the game.

Former women's world number five Daniela Hantuchova hailed Sinner's "braveness and calmness", adding: "When it really mattered, he stepped it up big time and to be able to do that at such a young age, we are looking at something very, very special here."

Greg Rusedski, runner-up at the 1997 US Open, added on Amazon's broadcast: "Rafa was the youngest to be in the Miami finals. Mentally they have a lot in common. Different styles but just bold and brave."

Second seed Stefanos Tsitsipas has blown a strong position to be knocked out of the Miami Open by world number 37 Hubert Hurkacz in three sets on Thursday night.

The Polish 26th seed lost the first set and trailed 0-2 in the second with Tsitsipas having two break points, before fighting back for an outstanding 2-6 6-3 6-4 triumph.

The victory seals Hurkacz's place in his first-ever Masters 1000 semi-final where he will face Russian fourth seed Andrey Rublev.

On Thursday night, Rublev won 7-5 7-6 (9-7) over Sebastian Korda, ending the young American's exceptional run in Miami.

Tsitsipas's demise was the major story on Thursday, having only dropped one set in his previous three matches in Miami.

The Greek world number five was in form, having made February's Australian Open semi-finals and last week's Mexican Open final.

Tsitsipas was in control until Hurkacz dialed up his aggression in the second, producing a brilliant flick after the Greek's volley to take advantage at 2-2.

Hurkacz got the crucial break at 2-2 in the third when the Greek coughed up a mistake by missing a routine smash.

The 24-year-old Pole also sent down 15 aces in a breakthrough win.

"It is so big," Hurkacz said in his on-court interview about reaching his maiden Masters 1000 semi-final.

"I was trying to keep fighting and that’s what I did. [I am] super pumped and happy that I was able to turn this match around.

"He was returning very well and I had to play a lot of rallies. At the beginning of the match, I tried to go for too much, so then I was trying to adapt my game a little bit."

Rublev claimed his 20th ATP Tour win for the calendar year, the most of any player ahead of Daniil Medvedev and Tsitsipas with 17, to book his semi-final spot against Hurkacz.

The defeat ended 20-year-old Florida resident Korda's superb run, where he claimed his first top 20 win against Fabio Fognini and first top 10 victory against Diego Schwartzman.

Top seed Daniil Medvedev powered his way into the Miami Open quarter-finals, along with Stefanos Tsitsipas and Andrey Rublev on Tuesday.

Medvedev won in straight sets against unseeded American Frances Tiafoe, hitting 24 winners.

Second seed Stefanos Tsitsipas won in straight sets against 24th seed Lorenzo Sonego, although the second went to a tie-break which the Greek dominated.

World number eight Andrey Rublev got past Marin Cilic in straight sets to book his last-eight spot.

Fifth seed Diego Schwartzman was the major casualty on Tuesday, losing to unseeded American Sebastian Korda in three sets. Seeds Josh Isner, Milos Raonic and Taylor Fritz also exited.

TOP SEED EASES INTO LAST EIGHT

World number two Medvedev was too good for Tiafoe in a 6-4 6-3 victory.

Medvedev improved his 2021 record to 17-2, sending down 11 aces with a dominant first-serve display while taking three of his four break points.

The 2021 Australian Open runner-up will meet seventh seed Roberto Bautista Agut in his maiden Miami Open quarter-finals appearance.

"It was definitely a tough match," the Russian said in his post-match on-court interview. "I am just looking forward to tomorrow. Roberto is a hell of a player.

"I feel like sometimes, when I have practised with him and played against him, that his ranking should be higher. There are reasons why it is not and I am going to try to do something with it tomorrow."

STEFANOS SIZZLES PAST SONEGO

Tsitsipas kept up his good form after making last month's Australian Open semi-finals, by booking his first Miami Open quarter-final appearance.

The Greek world number five defeated Sonego 6-2 7-6 (7-2) with a clinical performance to keep alive his dream of a maiden ATP Masters title.

Tsitsipas won in just over an hour and a half, proving too good on serve, having not offered up one break point and winning 89 per cent of first-serve points.

He was also too good with his return for the Italian, winning 35 per cent of the points on Sonego's serve.

The Greek will take on Polish 26th seed Hubert Hurkacz in the last eight, after he knocked out 12th seed Raonic 4-6 6-3 7-6 (7-4).

FIFTH SEED TOPPLED BY KORDA

World number nine Schwartzman was knocked out in three sets by Korda 6-3 4-6 7-5 as he continues his super run.

Florida resident Korda, 20, reached his maiden ATP 1000 quarter-final, showing fight after the Argentinian raised his game in the second set, winning after an early break in the last.

Rublev made light work of former US Open champion Marin Cilic, triumphing 6-4 6-4.

Bautista Agut got past 18th seed Isner 6-3 4-6 7-6 (9-7), while Jannik Sinner defeated Alexander Zverev's conqueror Emil Ruusuvuori 6-3 6-2.

Alexander Bublik, seeded 32nd, sent down 23 aces as he beat Taylor Fritz 6-7 (5-7) 6-3 6-4.

Stefanos Tsitsipas battled through to the Miami Open round of 16 and he was joined by Andrey Rublev on Monday.

Greek star and second seed Tsitsipas got the better of 2014 US Open runner-up Kei Nishikori in Miami.

Rublev continued his fine 2021 with a straight-sets demolition of Marton Fucsovics at the ATP 1000 tournament.

In-form Aslan Karatsev, however, bowed out following a surprise loss to Sebastian Korda.

TSITSIPAS HALTS NISHIKORI

Despite a mid-match wobble, Tsitsipas overcame Nishikori 6-3 3-6 6-1 to reach the fourth round.

Former world number four Nishikori forced a deciding set but Tsitsipas withstood the Japanese's comeback.

Tsitsipas, who hit 32 winners, will meet Lorenzo Sonego for a place in the quarter-finals after the 24th seed defeated Daniel Elahi Galan 7-6 (8-6) 6-3.

RUBLEV STAYS HOT

Russian fourth seed Rublev made light work of Fucsovics 6-2 6-1 in just 52 minutes.

Rublev leads the ATP Tour with 18 victories this season after eliminating the in-form Hungarian, ahead of top seed Daniil Medvedev (16-2).

The result secured a third win for Rublev over 29th seed Fucsovics this month.

"I was laughing, because of [the] situation and plus Marton also told me, 'I don't want to see you. I don't want to see you'," Rublev said, cracking a laugh. "[It was] just a situation that [was] fun, and I feel sorry."

Awaiting Rublev is 2014 US Open champion and former world number three Marin Cilic, who beat Lorenzo Musetti 6-3 6-4.

KARATSEV CONQUERED

For only the third time this year, Australian Open semi-finalist and Dubai Tennis Championships winner Karatsev tasted defeat following a 6-3 6-0 loss at the hands of Korda.

American sensation Korda became the first player outside the top five to beat Karatsev this year, with the latter's previous two losses coming against world number one Novak Djokovic and world number four Dominic Thiem.

"It is super special [to reach the Round of 16], especially playing a guy who was as hot as he was," said Korda. "I just took the tactics that I used [against him] at Roland Garros and it worked out really well today."

Diego Schwartzman stands in the way of Korda and the quarters after the fifth seed accounted for Adrian Mannarino 6-1 6-4.

Elsewhere, Denis Shapovalov – the sixth seed – was upstaged by Hubert Hurkacz 6-3 7-6 (8-6).

Another Canadian awaits Hurkacz after 12th seed Milos Raonic was a 6-4 7-5 winner against Ugo Humbert.

Stefanos Tsitsipas continued his strong run of form en route to the Miami Open third round, while Aslan Karatsev's maintained his fairytale run in 2021.

Greek star Tsitsipas flexed his muscles in a straight-sets win over Damir Dzumhur on Saturday.

Australian Open semi-finalist and Dubai Tennis Championships winner Karatsev enjoyed a victorious Miami debut.

Andrey Rublev, Diego Schwartzman, Denis Shapovalov, Marin Cilic and Milos Raonic also progressed at the ATP 1000 tournament.

TSITSIPAS STAYS HOT

World number five Tsitsipas eased past Dzumhur 6-1 6-4 in his first appearance since losing in last week's Mexican Open final.

Tsitsipas (15-4) became the third player to reach 15 wins this season, the second seed following in the footsteps of Russian duo Rublev (17-3) and Daniil Medvedev (15-2).

"It was a great match, especially against a guy that I probably don't have a good record playing against in the past," said Tsitsipas. "I started the match very strong, breaking him twice and taking a big lead in the score, and I think the things worked out by themselves after that."

Tsitsipas will face Kei Nishikori after the Japanese outlasted Aljaz Bedene 7-6 (8-6) 5-7 6-4.

NO STOPPING KARATSEV

Karatsev's Miami Open debut ended in a 6-4 6-3 win for the 17th-seeded Russian over Mikhail Kukushkin.

Already in the ATP's top 100 and set to keep climbing, Karatsev broke serve four times en route to the next round, where Sebastian Korda awaits after upstaging 10th seed Fabio Fognini 1-6 6-4 6-2.

"Of course it gives me confidence to win my first title, but you arrive here and it’s a different surface and new tournament," said Karatsev, who ended last season ranked 112th before bursting into the top 30 behind his semi-final run at Melbourne Park. "So you try [to think of it] as a new tournament and new place, but of course it gives me a lot of confidence."

Karatsev owns a 13-2 record this year, with his only two losses coming against world number one Novak Djokovic and US Open champion Dominic Thiem.

RUBLEV ROLLS ON

Fourth seed Rublev has proven to be remarkably consistent, highlighted by his crushing 6-1 6-2 rain-interrupted victory against Tennys Sandgren.

Having equalled his previous best run in Miami, Rublev will play 29th seed Marton Fucsovics who took down Thanasi Kokkinakis 7-6 (7-3) 6-7 (4-7) 6-4.

Rublev has won a Tour-leading 17 matches this year.

Elsewhere, fifth seed Schwartzman was a 6-3 6-3 winner against Yasutaka Uchiyama, Shapovalov – the sixth seed – trumped Ilya Ivashka 6-7 (5-7) 6-4 6-4 in a marathon, 12th seed Raonic accounted for Jordan Thompson 6-2 6-1, former US Open winner Cilic surprised 13th seed Christian Garin 3-6 7-5 7-6 (7-5), while 15th seed Alex de Minaur was eliminated.

Third seed Alexander Zverev was sensationally dumped out of the Miami Open second round as Finnish 21-year-old Emil Ruusuvuori claimed his second top 10 win of his career.

Russuvuori bounced back after losing the first set, changing his tactics and overwhelming the German on Friday to set up a third round meeting with Mikael Ymer.

Ninth seed Grigor Dimitrov also bowed out, going down to Briton Cameron Norrie, while eighth seed David Goffin lost to James Duckworth.

World number two and top seed Daniil Medvedev eased past Lu Yen-hsun, while 11th seed Felix Auger-Aliassime, Karen Khachanov and John Isner all progressed.

TURNAROUND STUNS THIRD SEED

Zverev may have won last week's Mexican Open and the opening set 6-1 against Ruusuvuori but the tables turned quickly as the Finn produced one of the best displays of his career to date.

The 83rd ranked Finn moved regularly to the net and was aggressive in his approach, leaving Zverev rattled before winning 1-6 6-3 6-1 in a stunning momentum shift.

"I don't even know myself," Ruusuvuori said in his on-court interview when asked how he turned the match around.

"I wasn't feeling very comfortable in the first set and I was making a lot of unforced errors but slowly in the second I was starting to feel a bit better... Of course, it's one of the biggest wins in my career so it feels good."

He'll next face Ymer who knocked out 27th seed Nikoloz Basilashvili.

NINTH SEED BUNDLED OUT

Former world number three Dimitrov was ousted from the Miami Open on Friday, losing 7-5 7-5 to 56th ranked Norrie.

The Bulgarian took an early break and served for the first set at 5-3 but Norrie showed his mettle to break back twice to take the opener.

Norrie sent down 10 aces and was strong on serve throughout, claiming a significant win for his burgeoning career.

“It’s huge,” Norrie said. “He’s had a good start to the year. It was such a physical match at the start. He came out really fast and he set the tone at the beginning of the match. Massive one for me and I take a lot of confidence from it.”

Norrie's win sets up a third round meeting with American Taylor Fritz who beat Marcos Giron 6-2 6-2.

DANIIL DOMINATES, GOFFIN SHOCK

Australian Open runner-up Medvedev made light work of Lu, winning 6-2 6-2 to book a third round match with Australian 21-year-old Alexei Popyrin.

Medvedev won in less than an hour, hitting 24 winners and nine aces and making few errors in a clinical display.

Canadian 11th seed Aliassime proved too good for Pierre-Hugues Herbert 6-4 6-4, setting up a third round meeting with 18th seed John Isner who got past qualifier Mackenzie McDonald.

Seventh seed Roberto Bautista Agut progressed by virtue of a walkover against Lloyd Harris who had a wrist issue.

Eighth seed Goffin lost to world number 104 Duckworth 6-3 6-1 in a boilover.

Lorenzo Musetti built on his good form with a first-round victory over Michael Mmoh at the Miami Open on Thursday.

Emerging star Musetti defeated American qualifier Mmoh 6-4 6-4 to set up a second-round meeting with 23rd seed Benoit Paire.

Former US Open champion Marin Cilic also progressed in a three-set victory over Federico Coria, while Thanasi Kokkinakis, Sebastian Korda, Tennys Sandgren and Jordan Thompson were other winners.

Former top-five player Kevin Anderson was among those to bow out in the first round of the ATP 1000 event.

STAR ON THE RISE

Italian teenager Musetti continued his rapid rise with a hard-fought victory over Mmoh.

The 19-year-old Musetti reached the semi-finals of last week's Mexican Open, where he beat both Diego Schwartzman and Grigor Dimitrov en route to the semi-finals.

This week, Musetti battled past wildcard Mmoh in one hour, 38 minutes.

"Last week was a fantastic run in Acapulco," Musetti said in his on-court interview. " I played a really good match, it was a tough match.

"I think my lethal weapon is the backhand down the line."

CILIC SLICE OF FORTUNE

Former world number three Cilic secured his place in the second round with a 6-3 2-6 6-4 victory against Federico Coria.

However, Cilic – the 2014 US Open winner – had a huge slice of luck to claim a break back in the first.

The Croatian got lucky down a break at 2-1 but up 30-40 in the first when he mishit his overhead attempt, striking his frame and bobbling over for a drop shot winner to level.

"It was important for me to keep my head down, keep the focus and just try to get the best level I could today," Cilic said.

FOND MEMORIES FOR THANASI

Australian qualifier Kokkinakis' fond memories in Miami returned with a 6-3 6-3 win over Shintaro Mochizuki as he continues his positive return from a shoulder injury.

Kokkinakis beat then-world number one Roger Federer in Miami in 2018.

Korda won his Miami Open debut match, triumphing 6-3 6-0 over Radu Albot to set up a meeting with 10th seed Fabio Fognini.

Jordan Thompson will face Milos Raonic after accounting for Federico Delbonis 7-6 (8-6) 6-4 in two hours, 12 minutes.

Sandgren – a two-time Australian Open quarter-finalist – got past Pedro Martinez 6-4 2-0, with the Spaniard retiring.

Wimbledon and US Open runner-up Anderson was a surprise casualty, going down 7-6 (8-6) 7-5 to lucky loser Damir Dzumhur.

"I know that my game can be much better than what I'm showing right now and my position in the ATP Rankings can be much better," Dzumhur said.

Vasek Pospisil launched a stunning tirade during his three-set defeat to American qualifier Mackenzie McDonald in the first round of the Miami Open on Wednesday.

The Canadian former world number 25 was docked a point for verbal abuse, subsequently conceding the first set, before a meltdown during the change of ends.

Pospisil used a profanity in reference to ATP chairman Andrea Gaudenzi when speaking to chair umpire Arnaud Gabas.

“[Gaudenzi was] screaming at me in a player meeting for trying to unite the players — for an hour and a half," Pospisil said to Gabas. "If you want to default me, I’ll gladly sue this whole organisation.”

He did fight back to win the second set but ultimately lost to McDonald 6-3 4-6 6-3.

Pospisil, who is nowadays ranked 67th, was joined among the first-round exits by last week's Mexican Open semi-finalist Dominik Koepfer, who went down 6-1 6-4 to wildcard Hugo Gaston as he claimed his first career Masters 1000 win.

Sam Querrey, ranked 63rd, also bowed out 6-3 6-4 to Lu Yen-hsun, who will meet world number two Daniil Medvedev in the second round.

YOUNGSTER BEATS VETERAN

Australian youngster Alexei Popyrin secured his maiden win at the Miami Open, knocking out the oldest player in the draw Feliciano Lopez 6-4 7-6 (7-4).

Popyrin, 21, claimed his first ATP Tour title last month in Singapore and backed that up with a strong display against the 39-year-old former top 20 Spaniard.

Recent Open 13 Marseille runner-up Pierre-Hugues Herbert got past Portugal's Pedro Sousa 6-1 6-3, while South Africa's Lloyd Harris defeated Emilio Nava 6-4 7-6 (9-7).

Frances Tiafoe won in the final match of Wednesday, coming from behind to beat Stefano Travaglia 5-7 6-4 6-2.

COMEBACK CAM

Brit Cameron Norrie produced a heroic final-set fightback to claim his spot in the second round, where he will face Grigor Dimitrov.

Norrie trailed 5-1 in the third set against Yoshihito Nishioka, before winning 6-1 3-6 7-5, winning the last six games to clinch victory.

The 56th-ranked Brit sent down eight aces in the victory, although he got the edge on return and converted seven of his 10 break points.

SECOND ROUND

Top seed Medvedev will face Lu on Thursday, while third seed Alexander Zverev will take on Finland's Emil Ruusuvuori.

Norrie will meet Dimitrov, while 11th seed Felix Auger-Aliassime faces Herbert and eighth seed David Goffin will take on James Duckworth.

Harris has a match-up against seventh seed Roberto Bautista Agut.

Andy Murray will not feature at the Miami Open after withdrawing from the tournament because of a groin injury.

The former world number one and three-time grand slam champion has featured only twice on the ATP Tour this season, losing in the first round in Montpellier before going one better in Rotterdam, where he was beaten by Andrey Rublev.

He withdrew from this month's Dubai Tennis Championships to be with his wife as she gave birth to their fourth child.

And his return to action has been delayed again, with Murray missing out on a tournament he has won twice.

The 33-year-old beat Novak Djokovic in the 2009 final and defeated David Ferrer to lift the trophy four years later. He lost to Djokovic in the final in 2012 and 2015.

Murray holds a 28-9 record in Miami, where he had been given a wild card. His place in the draw will be filled by a qualifier or a lucky loser.

The Scot has not competed in a Masters 1000 event since 2016, the next event at that level on the calendar is next month's Monte Carlo Masters.