Elina Svitolina required a third-set tie-break to progress at the Indian Wells Open, while former world number one Victoria Azarenka handled an old rival in straight sets and Simona Halep fell victim to an upset. 

Svitolina – the fourth seed – dropped the first set to 32nd seed Sorana Cirstea before fighting back to reach the round of 16 at the WTA Premier 1000 event on Sunday.

Two-time grand-slam champion Azarenka joined Svitolina in the next round after knocking out seventh seed Petra Kvitova, but 11th seed Halep became Aliaksandra Sasnovich's latest conquest. 

SVITOLINA SURVIVES CIRSTEA SCARE

Svitolina needed two hours, 32 minutes to outlast Cirstea 4-6 6-4 7-6 (7-3) and remain unbeaten in three career matches against the Romanian. 

The Ukrainian was on the defensive throughout the opening set, facing 11 break points on her serve and managing to save eight of them before Cirstea finally won out. 

Svitolina tightened things up from there, saving four of five break points the rest of the match. 

"It was a very tough match today, and I was fighting and trying to find my game," said Svitolina, who will face Jessica Pegula next. "It was a bit of a rollercoaster.

"I wish I could play a little bit better in the first set, I had chances to grab that set, but unfortunately it didn't play the way I wanted. I had to fight for every point, and Sorana played a great match, I think. I'm happy that I could win today."

AZARENKA TAKES DOWN KVITOVA

Azarenka won her first two Tour-level matches against Kvitova in 2008 and 2009 but had prevailed only once in six meetings since then before Sunday's 7-5 6-4 triumph. 

The two-time Indian Wells champion converted break-point chances when she needed them, six of 11 in all, and had 18 unforced errors to Kvitova's 26. 

"It was important to just stay there, really take my opportunities, not to let her," Azarenka said after taking down two-time Wimbledon winner Kvitova. "If she gets in the groove in couple points, not to kind of let her extend that streak, if you want to call it that.

"I was trying to still create opportunities for myself, be more aggressive, and honestly just believing also that what I'm doing is right and see how I can execute that. So intention was good. Execution followed after."

ANOTHER UPSET FOR SASNOVICH

After knocking off US Open champion Emma Raducanu in the second round, Sasnovich ushered out another grand slam winner in Halep 7-5 6-4 and will next face Azarenka.

The world number 100 had 22 winners to 16 for Halep and won 61.8 per cent of points on her serve as she reached the round of 16 at Indian Wells for the first time. 

In other matches Sunday, ninth seed Anastasia Pavlyuchenkova fell to 23rd seed and US Open runner-up Leylah Fernandez 5-7 6-3 6-4, while second seed Iga Swiatek dropped only one game in a 6-1 6-0 demolition of Veronika Kudermetova. 

Jelena Ostapenko and Shelby Rogers also advanced. 

US Open champion Emma Raducanu was sensationally beaten in her first match following her Flushing Meadows triumph, going down in straight sets to Aliaksandra Sasnovich at the Indian Wells Open on Friday.

The Belarussian, who is currently ranked 100th, stunned the 19-year-old Briton 6-2 6-4 in one hour and 25 minutes.

Raducanu had been on a 10-match winning streak coming into her maiden Indian Wells campaign.

"I'm still so new to everything. The experiences that I'm going through right now, even though I might not feel 100 per cent amazing right now, I know they're for the greater good," Raducanu said after the defeat.

"I mean, I'm 18 years old. I need to cut myself some slack."

Raducanu, who did not drop a set during her US Open run, appeared in control early after winning the opening six points, but Sasnovich claimed the first break in the third game.

Unforced errors proved costly for Raducanu as the clean-striking Sasnovich capitalized to win the first set, before opening the second set with another break.

Raducanu responded with an immediate break back and led 4-2 in the second set, before the Belarussian hit back by winning the next four games to topple the British teenager.

"It was a really good match for me. I play really well," Sasnovich said. "I know she just won US Open. I lost there in the first round. But I tried to go on court, I tried to enjoy. I did everything right."

FORMER WINNER HALEP PROGRESSES

Sasnovich will face two-time Grand Slam winner Simona Halep in the third round after the Romanian defeated Marta Kostyuk 7-6 (7-2) 6-1 in one hour and 33 minutes.

The 11th seed, who split with long-time coach Darren Cahill last month amid an injury-disrupted year, was down a break early before working her way back and dominating the tiebreak.

Halep broke twice in a more controlled second set to claim victory in her 10th appearance at Indian Wells.

"I missed a lot playing tennis at this level this year because I've been injured and many months, I couldn't play matches," said Halep, who won at Indian Wells in 2015. "I came here a little more aggressive than normal and I'm trying to improve my game and myself."

KVITOVA CRUISES AS TOP SEEDS WIN

Two-time major winner Petra Kvitova eased into the last 32 with a 6-2 6-2 triumph over Arantxa Rus from the Netherlands.

Seventh seed Kvitova set up a showdown with two-time Australian Open champion Victoria Azarenka after she beat Magda Linette 7-5 3-0 in a walkover. Kvitova leads Azarenka 5-3 in head-to-head battles.

Second seed Iga Swiatek dominated Croatian Petra Martic 6-1 6-3 to seal her passage into the third round, while fourth seed Elina Svitolina got past Teresa Martincova 6-2 7-5.

Beaten 2021 US Open finalist Leylah Fernandez triumphed over experienced Frenchwoman Alize Cornet 6-2 6-3 and will play ninth seed Anastasia Pavlyuchenkova in the third round after she easily accounted for Madison Keys 6-3 6-1.

Simona Halep has confirmed she has parted company with her long-time coach Darren Cahill.

Halep, who was the year-end number one in 2017 and 2018, has been coached by Cahill for the past six years.

She won the 2018 French Open, her first grand slam title, under his guidance before Cahill left the team for a spell to spend more time with his family.

Cahill – who also guided Halep to the 2018 Australian Open final – returned to coach the Romanian ahead of the 2019 WTA Finals, following on from her success at Wimbledon.

The 29-year-old has endured an injury-hit 2021 and was knocked out of the US Open in the fourth round by Elina Svitolina.

In a post on her official Twitter account, Halep announced: "After six wonderful years working together, Darren Cahill and I have decided that it's time to end our working relationship.

"Thank you D for everything, for making me a better tennis player and a better person."

Naomi Osaka was due to face Olga Danilovic on Wednesday, but the defending US Open champion was handed a walkover into the third round. 

Osaka, who defeated Marie Bouzkova in the first round to start her title defence at Flushing Meadows, is hunting her fifth grand slam title and third in New York. 

Serbian youngster Danilovic, who is being mentored by ATP world number one Novak Djokovic, defeated American Alycia Parks in straight sets on Monday but had to pull out of her second-round tie with Osaka due to a viral illness. 

However, the 20-year-old stressed she had not tested positive for COVID-19. 

"Hi everyone… I am so sad to have to withdrawal [sic] from my match this morning. I have been feeling unwell these past few days dealing with a non-COVID related viral illness," Danilovic wrote in an Instagram post. 

"I was really looking forward to playing against Naomi on Arthur Ashe Stadium today, but [it was] not to be this time. 

"I just want to say [a] big thank you to medical staff here [at the] US Open and [to] everyone for your support and I cannot wait to be back in New York at this amazing tournament next year." 

Osaka will face Leylah Fernandez in the third round on Friday after the Canadian beat Kaia Kanepi 7-5 7-5. 

Another of the big names, Simona Halep, also progressed, with the two-time grand slam winner seeing off Kristina Kucova 6-3 6-1. 

Stefanos Tsitsipas faces Andy Murray and Ash Barty will take on 2010 finalist Vera Zvonareva in the first round of the US Open.

French Open runner-up Tsitsipas and 2012 champion Murray is one of the standout matches in the opening round at Flushing Meadows.

Top seed Novak Djokovic will start his quest for a calendar Grand Slam against a qualifier in New York and could face a repeat of the Wimbledon final versus Matteo Berrettini in the last eight.

World number one Djokovic, a strong favourite for a record 21st major title with Rafael Nadal and Roger Federer absent due to injury, could do battle with Alexander Zverev at the semi-final stage.

Daniil Medvedev, the second seed, is in the bottom half with Tsitsipas, who he could come up against in the semi-final. Medvedev's first test will come against Frenchman Richard Gasquet.

Barty could come up against Iga Swiatek in the last eight and Karolina Pliskova if she makes it through to the semi-finals.

Simona Halep's encounter with Camila Giorgi is a mouthwatering first-round match, while defending champion Naomi Osaka returns to grand slam action against former US Open junior champion Marie Bouzkova.

Angelique Kerber could be a tough fourth round opponent for Osaka. Close friends Madison Keys and Sloane Stephens meet in another eye-catching first-round match.

There will be no Serena or Venus Williams at the final major of the year due to injuries.

Simona Halep says she is no longer afraid of coronavirus after getting vaccinated and hopes more players will take the jab.

Halep opted against travelling to New York for the US Open last year due to the pandemic before testing positive for COVID-19 last October.

The two-time grand slam champion missed the French Open and Wimbledon this year with a torn calf muscle, but claimed her first win since May at the Western and Southern on Tuesday, beating Magda Linette 6-4 3-6 6-0.

Former world number one Halep revealed she feels much more comfortable back on the circuit after taking the vaccine.

"I don't feel afraid, because I am vaccinated," The Romanian told reporters. "I feel protected. I am taking care. I wear the mask when many people are around."

Players have faced strict protocols since the tour resumed, with the challenges of staying in biosecure bubbles and playing in empty stadiums last year before restrictions gradually eased.

Stefanos Tsitsipas this week said that he would only take the vaccine if it becomes mandatory to play on the ATP Tour after Novak Djokovic stated he hopes it will not become a requirement to take the jab.

Halep hopes fellow professionals take the vaccine so they do not face such strict protocols.

"I don't like the bubbles," Halep said. "I feel very stressed when I'm in the bubble.

"So if people can vaccinate more and more (it) will be better, because we will not have more restrictions anymore."

Simona Halep, a three-time runner up in Cincinnati, claimed her first win since May by overcoming Magda Linette 6-4 3-6 6-0.

The 12th seed has just returned from a calf muscle tear which saw her miss the French Open and Wimbledon, and was defeated by Danielle Collins in Montreal last week.

However, at 1-4 down in the second set she required medical attention for what she described as a "sharp pain" in her right leg, but after a rain delay, the Romanian came out of the blocks to claim a third-set bagel.

Halep progressed to the Round of 32 where she will play American Jessica Pegula.

Sunday's breakthrough National Bank Open winner Camila Giorgo was beaten in straight sets by Pegula 6-2 6-2.

Former world number one Victoria Azarenka needed only one hour and nine minutes to dispose of Ludmilla Samsonova and seal her spot in the last 32.

The Belarussian triumphed 6-2 6-3 over the Russian, dominating her first serve and breaking Samsonova five times throughout the match.

Tokyo 2020 gold medalist Belinda Bencic eased past Marketa Vondrousova 6-3 7-5 continuing her bright recent run, winning in one hour and 27 minutes.

In the final match of the day's play, Caroline Garcia defeated 2017 U.S. Open champion Sloane Stephens 7-6 (9-7) 4-6 6-4 in two hours and 33 minutes.

Dayana Yastremska, Bernarda Pera, Karolina Muchova, Ons Jabeur, Elena Rybakina, Veronika Kudermetova and Coco Gauff were all winners too.

Two-time Grand Slam winner Simona Halep's return to the WTA Tour ended in defeat to American Danielle Collins in almost three hours in the National Bank Open in Montreal on Wednesday.

World number 28 Collins triumphed 2-6 6-4 6-4 over the sixth seed Romanian, with the second-round match lasting two hours and 55 minutes.

Halep, who is a two-time winner in Montreal, was returning to the Tour for the first time in three months since suffering a calf tear against Angelique Kerber in Rome.

Collins, who has won titles recently in San Jose and Palermo, loomed as a tough first-up test for Halep, who broke twice to win the first set 6-2 as she generated eight break points to one.

The game turned from then on, as Collins sent down 4-1 aces in the second set and finished with 38 winners for the match.

Tokyo 2020 bronze medalist and third seed Elina Svitolina was bundled out in a second-round shock, losing 3-6 6-3 6-2 to Briton Johanna Konta.

Svitolina boasted a 5-0 record against Konta heading into the match but was beaten in a two-hour-and-11-minute struggle.

Top seed Aryna Sabalenka defeated former U.S. Open champion Sloane Stephens in three sets to secure her third-round spot.

Sabalenka fought back from the brink, rallying to win the last five games and triumph 7-6 (7-4) 4-6 6-4 over the American wildcard in a two hours and 25 minutes.

Fourth seed Karolina Pliskova came from behind to win 4-6 6-3 7-6 (7-2) over Donna Vekic, while Jessica Pegula also fought back after a slow start to topple 10th seed Anastasia Pavlyuchenkova 1-6 6-3 6-2.

Greek 11th seed Maria Sakkari won in three sets 6-4 6-7 6-4 over Veronika Kudermetova, while 13th seed Ons Jabeur responded after a lopsided first set to win 2-6 6-3 6-4 over Daria Kasatkina.

Cori Gauff progressed after being 5-0 up as Anastasia Potapova retired, while Amanda Anisimova, Camila Giorgi, Rebecca Marino and Sara Sorribes Tormo all won too.

Canadian local hope Marino will take on top seed Sabalenka, while Gauff faces Svitolina's conqueror Konta.

Novak Djokovic will start the defence of his Wimbledon title against British wildcard Jack Draper, and Serena Williams takes on Aliaksandra Sasnovich in the first round.

Djokovic is just one grand slam title away from matching Roger Federer and Rafael Nadal's record tally of 20 after winning the Australian Open and French Open this year.

The world number one will take on 19-year-old Draper, a quarter-finalist at Queen's Club last week, in his first match at SW19 for two years after the 2020 championships were called off due to the coronavirus pandemic.

Djokovic faces a potential quarter-final against Andrey Rublev, while Federer could come up against second seed Daniil Medvedev in last eight.

First up for eight-time Wimbledon champion Federer is an encounter with Adrian Mannarino, while injury-plagued two-time winner Andy Murray will start his home major against the 24th seed Nikoloz Basilashvili.

Stefanos Tsitsipas, beaten by Djokovic in a thrilling French Open final this month, has been drawn to face American Frances Tiafoe in round one of a tournament that gets under way on Monday.

Simona Halep announced just before the draw was made on Friday that she would not defend her title due to a calf injury.

Williams, runner-up to Halep in the 2019 final, must get past Sasnovich of Belarus in the first round and could face third seed Elina Svitolina at the quarter-final stage.

World number one and top seed Ash Barty takes on Carla Suarez Navarro, who made a grand slam return at Roland Garros after recovering from cancer. Barty could come up against Bianca Andreescu in the last eight.

Petra Kvitova against Sloane Stephens is a standout first-round match, while Coco Gauff's first assignment will be a meeting with 20-year-old Briton Fran Jones.

Defending champion Simona Halep has withdrawn from Wimbledon due to a calf injury.

Halep has been out of action since she was helped off the court after suffering a tear of her left calf during a match against Angelique Kerber in Rome last month.

The two-time grand slam champion had hoped to be fit to defend her title at the All England Club after travelling to London, but pulled out just three days before the tournament gets under way.

"It is with great sadness that I'm announcing my withdrawal from The Championships as my calf injury has not fully recovered," said the 29-year-old Romanian, who also missed the French Open.

"I gave it everything I had in order to be ready to play Wimbledon and after having such special memories from two years ago, I was excited and honoured to step back on these beautiful courts as defending champion.

"Unfortunately, my body didn't cooperate and I'll have to save that feeling for next year.

"I can honestly say that I'm really down and upset about having to take this decision. This period has been difficult but to miss the last two majors has made it even more challenging mentally and physically.

"We will see what the future holds but I'm hoping it will make me a stronger person and athlete.

"Thank you to everyone at Wimbledon for your understanding and support."

Halep won her first Wimbledon title two years ago, outclassing Serena Williams 6-2 6-2 on Centre Court.

Simona Halep will not make her comeback in the inaugural Bad Homburg Open but remains hopeful of being fit to defend her Wimbledon title.

The two-time grand slam champion has been sidelined since suffering a calf injury during her a second-round match against Angelique Kerber at the Internazionali d'Italia in Rome last month.

Halep was due to feature in a new grass-court tournament in Bad Homburg, which starts on Sunday, but is not ready to return.

The world number three is determined to be back at full fitness to feature in the third major of the year at the All England Club.

She revealed in a social media post on Saturday: "I will not compete because my calf is not ready for a competition. I feel sorry about that and sad, because it's a beautiful place.

"I will keep practising because I really want to be able to play at Wimbledon, but for now I have to take care of my body and see how the recovery is going.

Wimbledon gets under way on June 28, having been cancelled last year due to the coronavirus pandemic.

Simona Halep will play in the inaugural Bad Homburg Open as she aims to return to fitness ahead of defending her Wimbledon title.

World number three and two-time grand slam winner Halep last month withdrew from the French Open after sustaining a calf injury.

The Romanian is targeting a return in time for the grass-court swing and will feature at the new WTA 250 event in Germany.

Designed with preparation for Wimbledon in mind, the Bad Homburg Open will run from June 20-26.

Halep, who has accepted a wildcard, is one of three former Wimbledon winners to be participating, alongside Angelique Kerber and Petra Kvitova.

"I have some good news to share with you," Halep said in a video posted to her official Twitter account.

"I am super excited to announce that I will be playing for the first edition in Bad Homburg and I am looking forward to seeing all of the fans in the stands."

Halep, who has also triumphed at Roland Garros, overcame Serena Williams 6-2 6-2 in the 2019 Wimbledon final.

The grand slam in London did not take place last year due to the coronavirus pandemic.

Simona Halep will miss this year's French Open due to a calf injury.

The 2018 champion at Roland Garros suffered a tear in her left calf while playing against Angelique Kerber at the Internazionali BNL d'Italia in Rome last week.

Halep posted a statement on Twitter on Friday confirming she will not recover in time to take part in the second grand slam of the season, which begins in Paris on May 24.

"It's with a heavy heart that I announce my withdrawal from Roland Garros this year,” the world number three said.

"Unfortunately the tear in my left calf muscle needs more time to recover and the timeline is just too short.

"Withdrawing from a grand slam goes against all my instincts and aspirations as an athlete, but it is the right and only decision to make.

"The thought of not being in Paris fills me with sadness, but I will focus my energy on recovery, staying positive and getting back on court as soon as it is safe to do so.

"Roland Garros 2022, I am coming for you! A bientot [see you soon!]"

Halep defeated Sloane Stephens to win the clay-court tournament three years ago, having previously lost finals in 2014 and 2017.

The 29-year-old Romanian – who also won Wimbledon in 2019 – made the quarter-finals at the Australian Open back in February, her run in Melbourne ended by Serena Williams.

Simona Halep revealed her Rome withdrawal this week was caused by a torn calf muscle, a blow that casts doubt on her prospects of playing the French Open.

Former world number one Halep had to be helped off court by coach Darren Cahill after she was injured while leading Angelique Kerber 6-1 3-3 in the second round of the Internazionali d'Italia on Wednesday.

The two-time grand slam champion on Friday announced the extent of her injury. Her misfortune comes with just over two weeks remaining until the clay-court grand slam at Roland Garros gets under way on May 30.

Wimbledon is the next major on the calendar after the Paris slam, with the All England Club tournament scheduled to start on June 28 in London.

"After an MRI here in Rome I can confirm that I have small tear high up in the left calf," Romanian Halep posted on her social media accounts.

"I will fly home today and begin recovery in the pool and gym on Monday.

"I'm staying positive and will do everything i can to speed up my return."

Halep, now 29 years old, won her first major title in Paris three years ago and went on to be crowned Wimbledon champion in 2019.