America's J.J. Wolf was the top seed in action on Tuesday at the Houston Open and he had no issue in his 6-3 6-2 first-round victory over Jordan Thompson.

Wolf, the fifth seed at the United States' only clay court event on the ATP Tour calendar, needed just 75 minutes to send the Australian home early on the back of a rock-solid serving performance.

Thompson was not able to produce a single break point opportunity in the match, and Wolf left an exclamation point on the contest by winning the final five games to run away with the win.

Meanwhile, seventh seed Marcos Giron gave the American crowd another win to cheer for in his 6-0 6-2 demolition of Ecuador's Emilio Gomez.

The chance for the double-bagel was there for Giron after winning the first 11 games to race out to a 6-0 5-0 lead, but he blew four match points as Gomez showed no quit and secured a break to at least take the match over the 60-minute mark.

Eighth seed Tomas Martin Etcheverry prevailed 6-3 6-4 in his all-Argentine clash against Juan Manuel Cerundolo, taking a 3-2 lead in their overall head-to-head meetings after rising 21-year-old Cerundolo took the past two.

German qualifier Yannick Hanfmann booked a second-round matchup against second seed Tommy Paul after a hard-fought 6-4 3-6 6-2 triumph over Japan's Yosuke Watanuki, while Chile's Cristian Garin had little resistance in his 6-3 6-0 victory in a South American showdown against Bolivia's Hugo Dellien.

In the late window, Jack Sock failed to complete the United States clean sweep for the day as he fell 6-2 6-4 to the Czech Republic's Tomas Machac.

Dominic Thiem claimed his first win since February with victory at the Estoril Open.

The former US Open champion and two-time Roland Garros finalist had gone his previous four ATP Tour-level events without a win.

But Thiem, once ranked as high as third in the world, ended the drought with a 3-6 6-3 6-4 defeat of compatriot Sebastian Ofner.

He will next face American Ben Shelton, who defeated Constant Lestienne 7-5 7-5.

Meanwhile, there were three shocks at the Grand Prix Hassan II in Marrakesh.

Roberto Carballes Baena came from a set down to beat fifth seed Maxime Cressy, Alexandre Muller overcame sixth seed Richard Gasquet, and qualifier Andrea Vavassori defeated eighth seed Nicolas Jarry.

Carlos Alcaraz is the latest to confirm he will not be competing at the Monte Carlo Masters.

The world number two already has two titles to his name in 2023 but lost the final of the Miami Open to Jannik Sinner.

Alcaraz was set to compete in Monte Carlo when the clay court season begins next week but has joined compatriot Rafael Nadal in withdrawing due to injury.

Posting on Twitter, he said: "After two months abroad, I am happy to return home but sad because I finished my last match in Miami with physical discomfort.

"After visiting my doctor in Murcia today and being evaluated, I will not be able to go to Monte Carlo to start the clay court tour.

"I have post-traumatic arthritis in my left hand and muscular discomfort in the spine that needs rest to prepare for everything that is to come."

Alcaraz's defeat to Sinner in Miami saw him cede top-spot in the ATP world rankings to Novak Djokovic, having returned to the summit in March.

The Spaniard was previously ranked number one from September 2022 until January 30, 2023.

Sixth seed Jason Kubler made light work of 39-year-old Spaniard Fernando Verdasco in the first round of the Houston Open while Americans Steve Johnson and Denis Kudla advanced on Monday.

Kubler and Verdasco endured a 71-minute first-set tussle, which the Australian edged 9-7 in a tie-break before dominating the second frame, dishing out a bagel in 29 minutes to win 7-6 (9-7) 6-0.

World number 71 Kubler progressed to the second round where he will take on Colombia's Daniel Elahi Galan who defeated China's Zhang Zhizhen 6-2 6-3.

Johnson set up a second-round clash with American compatriot and top seed Frances Tiafoe after getting the better of Facundo Bagnis 7-6 (7-5) 1-6 6-1 in one hour and 55 minutes.

USA's Kudla also progressed with a hard-fought 6-4 4-6 6-4 victory over Australia's Aleksandar Vukic in just under two hours.

Dutchman Gijs Brouwer won 6-4 6-4 over Aleksandar Kovacevic, setting up a meeting with big-serving fourth seed John Isner.

Hugo Gaston fought back from a set down to beat Jan-Lennard Struff at the Grand Prix Hassan II.

Gaston rallied after dropping serve twice in the opening set, prevailing 3-6 6-4 7-5 to become the first player to book their spot in the last-16.

Jaume Munar followed suit with a 6-4 6-4 victory over Elliot Benchetrit.

Elsewhere, at the Estoril Open, victories for Pedro Cachin and Sebastian Baez set up a potential hat-trick of wins for Argentine players.

Cachin beat Tseng Chun-hsin 6-4 6-4 and Baez overcame Radu Albot 7-5 7-6 (7-3) but seventh seed Diego Schwartzman could not follow up with a win of his own, losing 6-3 7-6 (10-8) to Marco Cecchinato.

Fabio Fognini also booked his spot in the last 16 by beating compatriot Alessandro Giannessi in straight sets.

Daniil Medvedev won his fourth title of the 2023 season but claimed Sunday's Miami Open was the biggest one yet after knocking over Jannik Sinner 7-5 6-3 in the decider.

Medvedev improved his outstanding season record to 29-3, well ahead of the next best Sinner (21-5) with the straight-sets triumph. The Russian will rise to number four in the ATP world rankings on Monday.

The Miami title comes after the 27-year-old lifted crowns in Dubai, Doha and Rotterdam and reached the Indian Wells Open final, only to lose to top-ranked Carlos Alcaraz. During that run, Medvedev has an overall record of 24-1.

Despite Medvedev's remarkable form, Miami was his first ATP Masters 1000 title since winning the Canadian Open in Toronto in 2021.

"I haven't won such a big title in probably a year and a half," Medvedev said. "At the end I was quite shaky. Not even tight, because I'm not scared to win. But still the hands get a little shaky so the serve is a little bit tougher… I managed to get myself together and close the match.

"It's the best start of the season I have ever had. Amazing amount of points won. I think 2019 was great also with six finals and it was also new for me in 2019. So I think it's kind of the same." 

Medvedev triumphed in one hour and 34 minutes, although the contest was closer than the scoreline suggested, with both players hitting 27 winners and 14 unforced errors each.

The Russian was impressive on serve, winning 86 per cent of first serve points, but he also committed six double faults with nine aces.

"I'm really happy," Medvedev said. "Today was a tough match. It was probably the hottest day and the most humid during the day.

"It was not easy conditions. I don't know if Jannik had a small injury or cramp. I was also struggling, tried not to show it."

Medvedev is the first male to reach consecutive ATP 1000 finals since Novak Djokovic in 2020. The Russian's other ATP 1000 titles include Paris in 2020, Shanghai in 2019 and Cincinnati in 2019.

The 2021 US Open winner has also claimed 16 ATP tournament titles on hard courts since 2019, ahead of Djokovic (14) and Andrey Rublev (10) during that period. The ATP Tour now moves to clay courts.

"Generally I love hard courts," he said. "I love playing on it. If it would be my choice, it would be only hard courts, but I completely understand that that's not fair, if we can say like this. I feel the best at my game on hard courts."

Daniil Medvedev extended his perfect record against Jannik Sinner to six matches after defeating him 7-5 6-3 in Sunday's Miami Open final.

Medvedev also beat Sinner in February's Rotterdam Open final, marking his fifth win from their fifth meeting, and by improving that to 6-0 it means it is the Russian's equal-best record against a single opponent, along with Felix Auger-Aliassime and Diego Schwartzman.

Sinner had a great opportunity to take the first set, creating five break point opportunities compared to Medvedev's three, and he kept his service games clean with no double faults while Medvedev racked up four.

The 21-year-old Italian could have forced a tiebreaker in the first set, but failed to hold his serve at 6-5 down, and Medvedev capitalised on the momentum to grab an immediate break to start the second frame.

To Sinner's credit, he snatched the break right back, but Medvedev got another and safely served it out the rest of the way.

The writing was on the wall after the first set, as Medvedev came into the contest a perfect 24-0 this season when securing the opener, and the title is his 16th on hard courts since 2019, two more than second-placed Novak Djokovic (14) over the span.

It is his 19th singles title overall – at a 19th different tournament – and after a brief rough patch getting over the line, he has become one of the sport's great finishers. 

From November 2021 through June 2022 he lost five finals in a row, but he has since won six of his past seven, claiming his fifth Masters 1000 crown in the process.

Jannik Sinner is through to the Miami Open decider after eliminating world number one Carlos Alcaraz 6-7 (4-7) 6-4 6-2 in Friday's semi-final.

Sinner, 21, has enjoyed a terrific start to 2023. Since the beginning of the Australian Open, the Italian has only lost three matches – to Stefanos Tsitsipas, Daniil Medvedev and Alcaraz.

He avenged his defeat to Tsitsipas with a straight sets win at the Rotterdam Open, and he has now got one back on Alcaraz after their three-hour war of attrition.

Both players created exactly 12 break point opportunities, and Sinner's 26 unforced errors were only one less than Alcaraz's 27, but the Spanish 19-year-old committed an uncharacteristic nine double faults. The loss snapped Alcaraz's 10-match winning streak.

The victory gives Sinner his second appearance in the Miami Open final after losing the 2021 edition to Hubert Hurkacz, and he now joins Rafael Nadal and Novak Djokovic as the only players to ever reach the final here twice before turning 22.

Sinner will get a chance to avenge his only other loss this year in the final after Daniil Medvedev booked his spot with a 7-6 (7-5) 3-6 6-3 victory over Russian compatriot Karen Khachanov.

Incredibly, Khachanov lost despite hitting 53 winners and only 11 unforced errors, and he ended up edging the total point count 93-88, but he could only convert two of his six break point opportunities, while Medvedev converted two out of four.

The win means Medvedev is the first player since Roger Federer in 2019 to reach the final of both the Indian Wells Open and the Miami Open in the same season, and he is the first since Federer in 2006 to reach five ATP finals before the clay court season begins.

Russian and Belarusian athletes will be allowed to compete at this year's Wimbledon after the All England Club (AELTC) reversed its ban from the previous year.

Players from those nations were banned from competing in response to Russia's illegal invasion of Ukraine in 2022 and the support provided to Russia by Belarus. 

The lifting of the ban does come with certain conditions, with players only allowed to compete if they do so as a "neutral" athlete and without funding from either state or state-run organisations. 

Players and support staff will also have to sign neutrality declarations and will be barred from showing any "expressions of support" for the ongoing war in Ukraine.

"We continue to condemn totally Russia's illegal invasion and our wholehearted support remains with the people of Ukraine," said AELTC chairman Ian Hewitt.

"This was an incredibly difficult decision, not taken lightly or without a great deal of consideration for those who will be impacted.

"It is our view that, considering all factors, these are the most appropriate arrangements for The Championships for this year. 

"We are thankful for the government's support as we and our fellow tennis stakeholder bodies have navigated this complex matter and agreed on conditions we believe are workable.

"If circumstances change materially between now and the commencement of The Championships, we will consider and respond accordingly."

The AELTC said the move came about after intense discussions with the UK government, the Lawn Tennis Association (LTA) and international stakeholder bodies in tennis.

It also confirmed the change in policy was a response to the "strong and very disappointing reaction" to last year's ban as well as the organisation having witnessed a year of Russian and Belarusian athletes competing neutrally on the tour circuit.

The LTA was the only organisation to bar athletes from those nations from competing in their events and was fined $1million by the WTA for the move.

The reversal of the decision will allow previously banned athletes to compete in the grand slam as well as the other events in the run-up to Wimbledon at Queen's Club and Eastbourne. 

World number one Carlos Alcaraz made it 10 wins in a row in Miami and kept alive his hopes of a rare Sunshine Double as he beat Taylor Fritz in straight sets in Thursday's quarter-finals.

Alcaraz swept aside the 2022 Indian Wells champion 6-4 6-2 in a lopsided Miami Open contest which lasted only 79 minutes, with the Spaniard breaking Fritz in the opening game of both sets.

Both players hit 20 winners, including 11 each on their respective forehands, but Fritz almost doubled Alcaraz' unforced errors count (28-13).

The 19-year-old was impressive from the baseline and overwhelmed Fritz in the end. The American only won 38 per cent on his second serve.

Alcaraz, who won the Indian Wells title a fortnight ago, remains on track to become the eighth male to win the Sunshine Double (Indian Wells and Miami), with Roger Federer the last to achieve that in 2017.

The Spaniard would join Federer (2005, 2006, 2017), Novak Djokovic (2011, 2014, 2015, 2016), Andre Agassi (2001), Marcelo Rios (1998), Pete Sampras (1994), Michael Chang (1992) and Jim Courier (1991) in achieving the Sunshine Double.

Alcaraz will take on Italian 10th seed Jannik Sinner in the semi-finals, after the duo faced off in the Indian Wells last four a fortnight ago, with the Spaniard winning in straight sets.

In-form Daniil Medvedev progressed to the semi-finals with a 6-3 7-5 victory over American qualifier Chrstopher Eubanks, who had enjoyed a dream run in Miami.

Medvedev has a 27-3 record this season and will pursue a fifth straight ATP Tour final when he takes on compatriot Karen Khachanov in the semi-finals.

Khachanov, who made this year's Australian Open semi-finals, defeated Francisco Cerundolo 6-3 6-2 in 76 minutes.

Daniil Medvedev says he has never started a season this well before following his 27th victory of the year to secure his place in the Miami Open semi-finals on Thursday.

The Russian world number five prevailed over American qualifier Christopher Eubanks 6-3 7-5 to qualify for the Miami semis after falling in the last eight in both 2021 and 2022.

Medvedev's progress comes after his 19-match winning run was ended in the Indian Wells Open final by Carlos Alcaraz a fortnight ago.

The 27-year-old has now won 22 of his past 23 matches and is 27-3 on the season, having won titles in Rotterdam, Doha and Dubai and is now chasing a fifth straight appearance in an ATP Tour final.

"I have never had such a good start to the season," Medvedev said. "A lot of matches won, tournaments won. I am really happy.

"I was disappointed at Indian Wells when my streak ended on the same number as last time. The only thing you can do is begin a new streak and I am happy to bring my form into Miami."

Medvedev will rise up to fourth in the ATP rankings if he lifts the Miami title, with the incumbent Casper Ruud suffering a third-round loss to Botic van de Zandschulp earlier this week.

The 2021 US Open champion is clear atop the ATP standings for most match wins in 2023, with his 27 well ahead of the next best, Cameron Norrie (21-5).

The Russian, who will take on countryman Karen Khachanov in the semi-finals, credited work with mental coaches for his improvement in 2023.

"That's something I want to improve," he said. "For example, talking about Indian Wells, I had my tantrums, which it's not good.

"It can throw you out from the concentration, and it's not a good look anyway, but I managed to still win matches and still be concentrated during those matches."

On the Khachanov match-up, which he leads 3-1 on head-to-head, he added: "I think maybe just a little bit you have to kind of force yourself even more to be focused, and when I say this, it's just because they know your game so well and you know theirs so well.

"I'm almost sure we know how the match is going to go tomorrow, and it's a question of who's going to make the best shot out of [the shots] we're going to play."

Novak Djokovic looks set to appear at the 2023 US Open after the United States Senate passed a bill to end COVID-19 restrictions.

The 22-time grand slam champion last competed in the tournament two years ago, losing to Daniil Medvedev 6-4 6-4 6-4 in the final.

He missed the 2022 edition because he had not been vaccinated against coronavirus, with the USA making vaccines a requirement for international travellers arriving in the country from November 8, 2021.

Djokovic was also absent for the 2022 Australian Open as he was deported from the country after immigration officials cancelled his visa because of the Serbian's unvaccinated status.

He returned to Melbourne Park at the start of this year and won a 10th Australian Open title – he will be hoping for a similar impact at Flushing Meadows after his return moved a step closer to reality.

On Wednesday, the US Senate voted in favour of ending the COVID-19 national emergency declared in March 2020, meaning the bill is now set to be considered by President Joe Biden, who is expected to sign.

As such, Djokovic will – assuming he is not ruled out for other reasons – be able to compete at this year's tournament, which is due to begin on August 28.

The news will surely come as major boost to Djokovic, who has already been prevented from entering US-based tournaments in 2023.

The 35-year-old was denied clearance to enter the US earlier in March ahead of Indian Wells and the Miami Open, with his application for special permission turned down by officials.

Italian 10th seed Jannik Sinner downed Emil Ruusuvuori to secure his berth in the Miami Open semi-finals along with bringing up his 20th win of the season on Wednesday.

Sinner, who dropped only one point on first serve, won 6-3 6-1 over the Finn in one hour and 16 minutes.

The 21-year-old Italian will face either top seed and defending champion Carlos Alcaraz or 2022 Indian Wells winner Taylor Fritz in the last four. Sinner lost to Alcaraz in the Indian Wells semi-finals a fortnight ago.

Alcaraz and Fritz's Miami quarter-final was postponed to Thursday with persistent rain forcing the evening session in Miami to be cancelled.

The other quarter-finals between 14th seed Karen Khachanov and 25th seed Francisco Cerundolo along with fourth seed Daniil Medvedev and qualifier Christophr Eubanks were also re-scheduled for Thursday.

The Sinner-Ruusuvuori clash was also impacted by a two-hour rain delay, but the Italian prevailed to maintain his perfect record in Miami, having not dropped a set.

"We both played well today but I won the important points," Sinner said. "It's never easy when you are up and you get interrupted, but I came back and played well."

Sinner's run to the Miami semi-finals has seen him drop the fewest games (23) since Rafael Nadal (21) and Novak Djokovic (23) in 2014.

The Italian became the seventh male to reach the semi-finals at both Indian Wells and Miami in a single year before turning 22, joining an elite list in Andre Agassi (1990), Jim Courier (1991), Djokovic (2007), Andy Murray (2007 and 2009), Nadal (2008) and Alcaraz (2022).

Sinner's 2023 record is now 20-4, bettered only by Medvedev (26-3) and Cameron Norrie (21-5).

Carlos Alcaraz does not disagree with Novak Djokovic's assertion of being the best player in the world, as the Spaniard outlined his hope of facing the 22-time major winner at full fitness.

Alcaraz has played Djokovic once before, overcoming the Serbian en route to triumphing at last year's Madrid Open.

The teenager's success in Madrid marked his fifth tour-level title, and his second at an ATP 1000 event.

Earlier in March, Alcaraz claimed his third ATP 1000 title with victory at the Indian Wells Open, seeing the 19-year-old leapfrog Djokovic – who has been unable to compete in the United States due to his COVID-19 vaccination status – back to the top of the world rankings.

Djokovic claimed in interview with The National in February that he was still the best player in the world when at 100 per cent fitness.

Alcaraz, for his part, shares that view.

"Well, it is tough one, but, I have to play against Novak when he's at 100 per cent," Alcaraz told reporters after beating Tommy Paul at the Miami Open, where he is defending champion.

"I would say in Madrid he played really, really well. So it was close. But I agree with him. When he's 100 per cent, probably the best player in the world.

"What Novak has achieved, the level of Novak for example in Australia was unbelievable, really high.

"So as I said before, I really want to play against Novak when he's 100 per cent and I'm sure I'm going to enjoy it. That's all I can say right now."

Alcaraz remains on course for the Sunshine Double – winning both the Indian Wells Open and Miami Open in the same season.

"I try not to think about that but it's difficult," he said. "You know, it's something that I really want. I want to be part of the few players that won the Sunshine Double.

"So for me, would be great to achieve that, but it's something that I try not think about and try to think about day by day, match by match, and that's all. 

"But of course it could be great to be part of that group of few players."

Eleven players, including Djokovic – on four occasions – have won the Sunshine Double, with WTA number one Iga Swiatek the latest to achieve the feat last season.

Second seed Stefanos Tsitsipas was bundled out of the Miami Open in straight sets during Tuesday's fourth round by 2022 US Open semi-finalist Karen Khachanov.

The Russian 14th seed prevailed 7-6 (7-4) 6-4 over Tsitsipas in one hour and 34 minutes, powering 25 winners and making only nine unforced errors, compared to the Greek's 14.

Khachanov's triumph ended a winless 0-6 head-to-head record against Tsitsipas, while it also snapped his own 23-match losing streak against top-10 opponents.

The Russian, who also made this year's Australian Open semi-finals, has qualified for four of his six tour-level events this year.

Khachanov will take on 25th seed Francisco Cerundolo in the quarter-finals, with the Argentinian fighting back to get past Lorenzo Sonego 3-6 6-3 6-2 in just over two hours.

Defending champion and top seed Carlos Alcaraz had less trouble against Tommy Paul, cruising into the quarter-finals with a 6-4 6-4 victory.

Alcaraz won the winners' count 24-9, setting up a quarter-final clash with ninth seed Taylor Fritz, as the Spanish 19-year-old chases a rare Sunshine Double, having won last week's Indian Wells Open.

Fritz progressed after getting past seventh seed Holger Rune 6-3 6-4 in 86 minutes, sending down eight aces and 22 winners for the match.

Fourth seed Daniil Medvedev played late into the evening after a lengthy rain delay in Miami, but made light work of Quinten Halys 6-4 6-2, triumphing just past 1:30am local time.

Medvedev, who is into his third straight Miami quarter-final, will face American qualifier Christopher Eubanks in the last eight after he got past Frenchman Adrian Mannarino 7-6 (7-2) 7-6 (7-5) in another rain-delayed contest.

Italian 10th seed Jannik Sinner knocked off sixth seed Andrey Rublev 6-2 6-4, advancing to face Emil Ruusuvuori after he beat Botic van de Zandschulp 4-6 6-4 7-5.