Top seed Cameron Norrie is through to the semi-finals of the Delray Beach Open after beating Sebastian Korda in three sets.

Norrie eventually overcame the American fifth-seed after a final set tie-break, winning 6-2 1-6 7-6 (7-4).

The Brit's tenacity was key, saving seven of 10 break points, and he will now face another American, Tommy Paul, in the final four in Florida after he beat qualifier Stefan Kozlov 6-3 6-1.

The other semi-final will be contested between Reilly Opelka and John Millman after they bested Adrian Mannarino and Grigor Dimitrov respectively.

Opelka was taken to a third set by his French opponent before winning 7-6 (7-2) 3-6 6-1, hitting 19 aces on his way to victory.

Millan proved too good for third seed Dimitrov winning 6-4 6-4 in an hour and 34 minutes where the Australian's return was a highlight.

At the Rio Open, rain washed out many of the scheduled matches on Friday, with Diego Schwartzman against Pablo Andujar and Miomir Kecmanovic against Francisco Cerundolo both cancelled.

Matteo Berrettini and Thiago Monteiro were finally able to finish their round of 16 match at 11.35pm local time, with the Italian securing victory 6-4 6-7 (6-8) 6-3.

He will play seventh seed Carlos Alcaraz who overcame Federico Delbonis 6-4 7-6 (7-1) after their match was pushed back, starting not long prior to midnight local time.

Roberto Bautista Agut followed two sprints with a gruelling slog as he battled past Karen Khachanov to reach the final of the Qatar Open.

Spanish second seed Bautista Agut had dashed past Andy Murray and Alejandro Davidovich Fokina for the loss of just three games in Doha, but Khachanov proved far more obdurate.

After a slow start, eventually Bautista Agut picked up the pace and emerged a 2-6 6-3 7-5 winner in two hours and 24 minutes of toil, earning a shot at Georgia's Nikoloz Basilashvili in Saturday's final.

Bautista Agut praised Russian Khachanov for making him scrap for the win.

"He was playing very fast," said Bautista Agut, quoted on the ATP website. "He was playing very solidly, he was defending very well and he hit many unbelievable passing shots. I had to play incredibly well tonight. I enjoyed tonight so much."

Third seed Basilashvili is the defending champion this week and made light work of France's Arthur Rinderknech, tying up a 6-4 6-2 victory.

In Marseille, Greek top seed Stefanos Tsitsipas was stunned by Russian qualifier Roman Safiullin in the Open 13 quarter-finals. World number 163 Safiullin had a staggering 13 break points against the under-performing Tsitsipas serve, and although 11 of those were saved, the two that were not decided the match.

Safiullin, for his part, faced one break point and saved it on the way to a 6-4 6-4 victory. He made his presence felt at the ATP Cup in Australia at the start of the year and, although results have been disappointing since, the 24-year-old is doing well again in France this week.

Next for Safiullin will be last week's Rotterdam champion Felix Auger-Aliassime, who saw off Belarusian Ilya Ivashka 6-3 6-4 in the last match of the day. After losing his first eight finals on the ATP Tour, Auger-Aliassime may well be closing in on a second title in eight days.

Saturday's other semi-final will see Russian second seed Andrey Rublev tackle Frenchman Benjamin Bonzi, who reached the last four of a main-tour event for the first time by crushing Aslan Karatsev 6-1 6-3.

Rublev dug deep to edge out French wildcard and former top-10 player Lucas Pouille 6-3 1-6 6-2.

Jelena Ostapenko will meet Veronika Kudermetova in the Dubai Tennis Championships final after defeating Simona Halep 2-6 7-6 (7-0) 6-0 on Friday.

Ostapenko, who is the world number 21, stunned Halep in their first meeting in the 2017 Roland Garros final to win her first Grand Slam before the Romanian exacted revenge in Beijing later that season.

In their first meeting since that last-four clash, Halep raced out the blocks to wrap the first set in just 27 minutes as she converted both break-point opportunities to take an early lead.

However, Ostapenko responded emphatically in the following set, claiming a 3-0 advantage before eventually levelling things up after a one-sided tie-break separated the pair in the second.

Ostapenko carried her momentum in the deciding set as she made a blistering start, with Halep unable to win a single game as the 24-year-old secured victory in an hour and 36 minutes.

Kudermetova awaits the Latvian in the final after Marketa Vondrousova was forced to withdraw from her last-four match due to a right adductor injury.

The pair have not met before on the WTA Tour but boast identical records at the start of the 2022 season, with both winning eight of their matches and losing three.

Favourites Reilly Opelka and Grigor Dimitrov joined top seed Cameron Norrie in the quarter-finals of the Delray Beach Open after victories on Thursday.

With Norrie having already set up a quarter-final against last year's runner-up Sebastian Korda, the Briton was joined in the last eight by the second and third seeds. 

Grigor Dimitrov defeated Mitchell Krueger to mark his first appearance since a disappointing second-round exit at the Australian Open in style.

The Bulgarian won 7-6 (7-4) 6-3, with Serena and Venus Williams watching on from the crowd in far from ideal conditions in Florida.

"It's always very tough [in your opening match], especially playing the last match on," Dimitrov said.

"I've been here for a week already and I was eager to get out there and play. Today was just a match I had to get through. Very tough conditions: rain, wind, cold, hot. It is what it is, and you've got to deal with it."

Opelka, who won the tournament in 2020, went the distance against fellow American Jack Sock, eventually prevailing 6-7 (6-8) 7-6 (7-4) 6-1. 

He will face Adrian Mannarino in the last eight, after the Frenchman's 6-4 2-6 7-5 defeat of Brandon Nakashima. Dimitrov will play Australian John Millman.

At the Rio Open, only two of the four scheduled matches were completed due to rain.

Qualifier Miomir Kecmanovic dispatched sixth seed Lorenzo Sonego 7-5 6-4, while Francisco Cerundolo overcame Roberto Carballes Baena.

Top seed Matteo Berrettini's clash with Brazilian Thiago Monteiro was pushed back to Friday, while Carlos Alcaraz will resume his match against Federico Delbonis in a strong position in the first set.

Denis Shapovalov crashed out of the Qatar Open after losing in straight sets to France's Arthur Rinderknech in their quarter-final on Thursday.

The top-seeded Canadian lost in just an hour and 20 minutes as Rinderknech sealed a 6-4 6-4 victory to seal his place in the semi-finals in Doha.

Shapovalov struggled throughout, making nine double faults and having to face 10 break points, of which he managed to save eight.

Rinderknech will now face Nikoloz Basilashvili after the Georgian fought back to beat Marton Fucsovics 1-6 6-3 7-5.

The other semi-final will see Karen Khachanov take on Roberto Bautista Agut, with the Russian also coming from a set down in beating Marin Cilic 3-6 6-3 6-4.

Bautista Agut followed up Wednesday's 6-0 6-1 victory against Andy Murray by again winning comfortably against fellow Spaniard Alejandro Davidovich Fokina, scoring a 6-1 6-1 success.

The number two seed won 74 per cent of points when landing his first serve as he sealed victory in an hour and 17 minutes.

At the Open 13 in Marseille, Rotterdam champion Felix Auger-Aliassime increased his winning streak to six matches after beating French veteran Jo-Wilfried Tsonga 7-6 (7-3) 6-2 to head through to the quarter-finals.

"It was a special moment," Auger-Aliassime said after his win. "When the match was coming to the end, I knew it was going to be a special moment, a full-circle moment. He was my top idol growing up and I saw myself in him at times."

Auger-Aliassime will play world number 49 Ilya Ivashka next, while top seed Stefanos Tsitsipas also went through after a 6-3 7-6 (7-4) win against Hugo Gaston. The Greek star will play Russian Roman Safiullin in the last eight.

Ninth seed Benjamin Bonzi beat fellow Frenchman Pierre-Hugues Herbert 6-4 6-3 and will go up against Aslan Karatsev in the next round, while Lucas Pouille overcame Radu Albot 6-3 3-6 7-6 (7-2) and will tackle Andrey Rublev next.

Two-time champion Simona Halep strode through to the Dubai Tennis Championships semi-finals with a 6-4 6-3 win over eighth seed Ons Jabeur on Thursday.

A series of upsets meant Jabeur was the only seed left in the tournament going into Thursday, but she was outfought by Halep, whose win-loss record in 2022 now stands at 11-1.

The result followed two years on from Halep beating Jabeur in the second round at the same tournament, on that occasion needing a third-set tie-break to get the better of the Tunisia. Halep went on to win the title on that occasion.

"It was a very tough match. Even if it's in two sets, it felt much harder than that," Halep said of Thursday's win.

"I had in my mind big time the match from 2020, it was so close and I knew I'd have to fight till the end."

Quoted on the WTA website, former Wimbledon and French Open winner Halep added: "I've been focused on what I have to do, and I wanted just to push Jabeur back because she has such a big game."

Halep will face Jelena Ostapenko in the last four after the big-hitting Latvian overcame Petra Kvitova 5-7 7-5 7-6 (11-9).

Kvitova led by a set and a break, and twice served for the match, yet Ostapenko prevailed to add the 2013 Dubai champion to the scalps of Sofia Kenin and Iga Swiatek this week.

Ostapenko, who triumphed in two hours and 39 minutes, has now reached at least the semi-finals in four of her last seven tournaments.

The other semi-final will be contested by Veronika Kudermetova and Marketa Vondrousova.

Kudermetova reached her third career WTA 500 semi-final after beating lucky loser Jil Teichmann 6-2 5-7 6-4 in two hours and 23 minutes.

Vondrousova, meanwhile, became just the third ever qualifier to reach the last four of the tournament thanks to a 7-5 6-4 win over Dayana Yastremska.

Diego Schwartzman felt he played "an almost perfect match" to overcome Pedro Martinez in straight sets and reach the quarter-finals of the Rio Open.

The third seed advanced with a 6-1 6-1 victory, though that does not quite tell the whole story as the second game of the first set lasted a mammoth 24 minutes and 40 seconds.

Martinez saved eight break points in that lengthy game before finally being outdone by Schwartzman, who will now face another Spaniard in Pablo Andujar.

Incredibly, Martinez won 31 points in the first set but just one game.

"It was unbelievable," Schwartzman said. "This was probably the longest game in the history of the tournament 

"I don't remember anything like this before. I played an almost perfect match, I played against an opponent that had as much confidence as me."

Andujar beat Albert Ramos-Vinolas 7-5 5-7 6-3, while fourth seed Pablo Carreno-Busta lost 5-7 6-4 6-3 to Fabio Fognini in the shock of the day.

Federico Coria awaits Fognini after following up his surprise win over defending champion Cristian Garin with a 7-6 (7-2) 4-6 6-4 victory against Fernando Verdasco.

At the Delray Beach Open, top seed Cameron Norrie beat Oscar Otte 6-3 7-5 and will face Sebastian Korda, who saw off Andreas Seppi 7-5 6-3, for a place in the semi-finals.

Tommy Paul and Stefan Kozlov are also through to the final eight in Florida after beating Denis Istomin and Steve Johnson respectively in straight sets.

Andy Murray suffered one of the heaviest losses of his career in the second round of the Qatar Open, while Andrey Rublev escaped an early exit at the Open 13. 

Former world number one Murray went down 6-0 6-1 to last year's runner-up Roberto Bautista Agut in Doha on Wednesday. 

It was just the fourth occasion in which the three-time major champion has lost a match while winning only one game or fewer in his career – the last time being a defeat by the same scoreline to Roger Federer at the ATP Finals in 2014. 

Murray's fellow Briton Dan Evans also endured a second-round loss, going down 4-6 7-5 6-4 to Alejandro Davidovich Fokina – Bautista Agut's next opponent. 

Denis Shapovalov bounced back from his first-round loss to Jiri Lehecka in Rotterdam last week by dropping just eight points on serve as he claimed a 6-4 6-0 victory over Alex Molcan inside 52 minutes. 

Next up for the Canadian will be Arthur Rinderknech after the Frenchman came from a set down to defeat seventh seed Alexander Bublik 6-7 (5-7) 6-1 6-4. 

Nikoloz Basilashvili faced little trouble in overcoming Elias Ymer 6-4 7-5 and his reward is a quarter-final against Marton Fucsovics, who got the better of Kwon Soon-woo. 

Karen Khachanov and Marin Cilic will meet in the last eight after they respectively eliminated Emil Ruusuvuori and Botic van de Zandschulp. 

In Marseille, second seed Rublev was made to work hard for a place in the Open 13 quarter-finals by home hope Richard Gasquet. 

Gasquet went a break up in the third set and, after surrendering his advantage, stopped Rublev serving out the match to force a tie-break. 

However, the world number seven did not waste his next opportunity as he sealed a 4-6 6-4 7-6 (7-3) success. 

Aslan Karatsev also booked his place in the last eight, while there were wins for Frenchmen Benjamin Bonzi and Lucas Pouille too. 

Defending champion Garbine Muguruza, 2021 finalist Barbora Krejcikova and top seed Aryna Sabalenka were all eliminated from the Dubai Tennis Championships on Wednesday.

A day of upsets left Ons Jabeur, the eighth seed, as the top remaining player in the draw.

Some big names helped deliver the shocks, though, with world number two Sabalenka usurped by two-time Wimbledon champion and 2013 Dubai winner Petra Kvitova in straight sets.

Muguruza did not look like being one of the scalps as her title defence continued against Veronika Kudermetova.

But after taking the first set, the reigning WTA Tour Finals champion went down 3-6 6-4 6-4.

French Open champion Krejcikova, beaten by Muguruza in the final last year, also exited the tournament at the hands of Dayana Yastremska 6-3 7-6 (7-3).

Iga Swiatek let a set lead slip to Jelena Ostapenko, while two-time Dubai champion Elina Svitolina collapsed to lucky loser Jil Teichmann 7-6 (7-0) 6-2.

Jabeur, a winner against Jessica Pegula, was the only seed to win in a ruthless round of 16.

However, her reward in a still stacked quarter-final draw is a meeting with Simona Halep, another who has twice won in Dubai.

Defending champion Cristian Garin was victim of the biggest shock of Tuesday's play at the Rio Open.

Fifth seed Garin – winner of the most recent edition in 2020 – exited a second consecutive tournament at the first-round stage after he was humbled by Federico Coria.

Coria had defeated the fifth seed, Dusan Lajovic, at last week's Argentina Open, too, but was particularly impressive on Tuesday.

A stunning 6-2 6-0 win was sealed in an hour and 16 minutes.

Coria fended off two break points midway through the first set and then won the remaining nine games in succession in a dominant victory.

Garin was the only seed to lose in Brazil, however, as Lorenzo Sonego was on the right side of a 6-2 6-0 scoreline against 2019 winner Laslo Djere.

Fabio Fognini also advanced in straight sets, while Spanish pair Albert Ramos-Vinolas and Fernando Verdasco similarly eased through.

At the Delray Beach Open, 2021 runner-up Sebastian Korda defeated Thanasi Kokkinakis in his first match since winning the Australian Open doubles title with Nick Kyrgios.

Former champion Sam Querrey came up short against Denis Istomin.

Andy Murray made a winning start at the Qatar Open after defeating Taro Daniel 6-2 6-2 in Doha.

The three-time grand slam winner was beaten in straight sets when he faced Daniel in the second round at the Australian Open last month.

But he avenged that defeat with a dominant display against the world number 110 that saw him prevail in one hour and 20 minutes.

Murray boasts an impressive record at the ATP 250 event, lifting the trophy in 2008 and 2009 while reaching a further two finals (2007 and 2017).

And the 34-year-old wildcard will face second seed Roberto Bautista Agut in round two.

"Taro played very well in Australia," Murray said. "He had a very good run there and was too good for me there. 

"I tried to be the one dictating from the first point, and I thought I did that well. It was one of the better matches I've played in recent months.

"Obviously, the results from years ago aren't going to affect the results this week.

"But what it tells me is that the conditions here are good for my game, so if I can play to a good level, the courts are going to suit me here, and I'll make it difficult for everyone I play against."

Elsewhere, seventh seed Alexander Bublik hit 25 winners – including seven aces – in a 6-2 6-4 victory over Slovakia's Jozef Kovalik.

However, there was no joy for Lloyd Harris; the eighth seed was beaten in straight sets by Hungarian Marton Fucsovics for the second year running.

Over at Open 13 in Marseille, three-time winner Jo-Wilfried Tsonga overcame fellow wildcard Gilles Simon 6-2 6-4 in the battle of the players boasting five titles between them at the event.

But seventh seed Alexei Popyrin lost out in a deciding-set tie-break to world number 163 Roman Safiullin.

Top seed Aryna Sabalenka and defending champion Garbine Muguruza came through their first-round matches unscathed at the Dubai Tennis Championships on Tuesday.

Belarusian Sabalenka made light work of 19-year-old Marta Kostyuk, sealing a 6-4 6-1 win in one hour and 15 minutes.

Standing in her way of a third consecutive quarter-final in Dubai is Petra Kvitova, who beat Camila Giorgi on Monday.

Last year's champion and fourth seed Muguruza began her title defence with a 7-6 (7-5) 2-6 6-2 win over Czech qualifier Katerina Siniakova in two hours and 24 minutes.

Spaniard Muguruza will face Veronika Kudermetova in the second round after the Russian beat former world number one Victoria Azarenka in straight sets earlier on Tuesday.

There were also wins for eighth seed Ons Jabeur and 10th seed Elina Svitolina against Vera Zvonareva and Mayar Sherif respectively.

Elsewhere, there was a shock as qualifier Elena-Gabriela Ruse dumped out third seed Paula Badosa 6-3 5-7 6-4.

Ninth seed Danielle Collins is also out after the American retired due to dizziness in the second set against Marketa Vondrousova.

Sofia Kenin failed to put up a fight as she went down 6-1 6-2 to Jelena Ostapenko.

Novak Djokovic has said missing grand slams including the French Open and Wimbledon will be "the price I am willing to pay" for resisting the COVID-19 vaccine.

Last month, the world number one and 20-time grand slam winner was deported from Australia on the eve of the Australian Open after his entry visa to the country was cancelled.

That stemmed from Djokovic refusing to join the overwhelming majority of fellow tennis stars in being vaccinated against coronavirus, and amid controversy over how he handled getting the virus himself in December.

In a new interview with the BBC, Djokovic said he was prioritising his right to choose what to put into his body above his sporting ambitions.

The 34-year-old Serbian declared his stance is likely to keep him sidelined for "most of the tournaments" at present.

Djokovic is set to make his return to the court at the Dubai Duty Free Tennis Championships later this month, with vaccination not a requirement. He has been included on the entry list for next month's Indian Wells Open, but that is a tournament he may have to sit out.

He confirmed in the BBC interview that he has still yet to be vaccinated, though did not entirely rule out the prospect in the future.

"I have not," he said. "I understand and support fully the freedom to choose whether you want to get vaccinated or not."

Prior to entering Australia, where he was obliged to confirm his status, it was only widely assumed that Djokovic had not been inoculated.

Now he is keen to "speak up ... and justify certain things", adding: "So I was never against vaccination. I understand that globally everyone is trying to put a big effort into handling this virus and seeing hopefully an end soon to this virus.

"And vaccinations are probably the biggest effort that was made on behalf of the planet. I fully respect that, but I've always represented and always supported the freedom to choose what you put into your body. For me that is essential. It's really the principle of understanding what is right and what is wrong for you.

"And me, as an elite professional athlete, I've always carefully reviewed and assessed everything that comes in, from the supplements, food, the water that I drink or sports drinks. Anything really that comes into my body as a fuel.

"Based on all the information that I got, I decided not to take the vaccine as of today. I keep my mind open because we are all trying to find collectively a best possible solution to end COVID. Nobody really wants to be in this kind of situation that we've been in collectively for two years."

Djokovic is the reigning French Open and Wimbledon champion and, after Rafael Nadal's Australian Open triumph, he has been bumped down to joint second on the all-time men's grand slam list. Missing majors at this stage of his career could be a crushing blow to Djokovic's hopes of finishing top of that pile.

"I'm part of a very global sport that is played every single week in a different location, so I understand the consequences of my decision, and one of the consequences of my decision was not going to Australia, and I was prepared not to go," Djokovic said.

"I understand that not being vaccinated today I am unable to travel to most of the tournaments at the moment. That is the price I am willing to pay."

He looked to disassociate himself from the anti-vax community by saying he had "never said I am part of that movement" and declaring that was a "wrong conclusion" to draw.

At the same time, Djokovic concurred when asked if he was willing to sacrifice the chance to be seen as the greatest player of all time, and to travel to Roland Garros and the All England Club this year.

"Because the principles of decision-making on my body are more important than any title or anything else. I'm trying to be in tune with my body as much as I possibly can," Djokovic said.

"I say that everyone has a right to choose to act or say whatever they feel is appropriate for them."

Teenage seventh seed Carlos Alcaraz fought back from a poor set to win 2-6 6-2 6-1 over fellow Spaniard Jaume Munar at the Rio Open on Monday.

The 18-year-old struggled for rhythm in the opening set but showed composure to respond by breaking Munar early in the second set and dominating from there.

Alcaraz took the victory in two hours and 15 minutes, saving 10 of 13 break points across the match, while dropping only three games in the second and third sets.

Spaniard Pedro Martinez set up a second-round clash with third seed Diego Schwartzman after a 6-3 6-4 win over Shang Juncheng.

Pablo Andujar Alba also progressed 7-6 (7-2) 7-5 over Pablo Cuevas, while Serbian qualifier Meomir Kecmanovic accounted for local wildcard Felipe Meligeni Rodrigues Alves 6-3 6-0.

At the Delray Beach Open in Florida, Steve Johnson beat South African veteran Kevin Anderson in just over two hours, triumphing 6-2 6-7 (5-7) 6-2.

Oscar Otte got past Yoshihito Nishioka 7-6 (10-8) 6-3 to set up a second-round date with top seed Cameron Norrie, while there were only two breaks across the match as seventh seed Maxime Bressy was ousted by John Millman 6-7 (2-7) 7-6 (7-2) 7-6 (7-3).

Italian veteran Andreas Seppi beat German Peter Gojowczyk 7-5 6-4, while young American Brandon Nakashima comfortably handled Denis Kudla 6-1 6-1.

Dan Evans and Karen Khachanov made strong starts at the Qatar Open on Monday, while top seed Denis Shapovalov learned who his first opponent will be. 

After just over an hour and a half, fifth seed Evans sealed a 6-4 6-4 victory over Egor Gerasimov in their first meeting on the ATP Tour. 

Evans won 85 per cent of points behind his first serve and did not face a single break point as he advanced to the second round. Malek Jaziri or Alejandro Davidovich Fokina will be his next opponent. 

Following a tight opening set, Khachanov overcame Mackenzie McDonald 7-6 (7-3) 6-3 to continue his impressive form early in the 2022 season.

Alex Molcan came from a set down and navigated a second-set tie-break to defeat Chris O'Connell and earn a meeting with Shapovalov in the second round. 

At the Open 13 in Marseille, home hope Richard Gasquet overcame Mikael Ymer 6-4 7-5 to book a meeting with Andrey Rublev in the second round. There were also wins for Stefano Travaglia and Ilya Ivashka.