Iga Swiatek is through to the quarter-finals of the Stuttgart Open after easing to a 6-1 6-4 win over Zheng Qinwen on her return from a rib injury.

Swiatek had not played since sustaining the issue in the semi-finals of Indian Wells over a month ago, but advanced on Thursday despite stating that she felt "rusty".

The world number one won 84 per cent of points after landing her first serve in as she made up for lost time.

Swiatek also forced eight break points, winning four of them as she took just and hour and 26 minutes to set up a quarter-final with Karolina Pliskova, who bested Donna Vekic in a thriller.

Pliskova looked to be on her way to a routine win as she claimed the first set 6-2, only for the Croatian to take the second via a tie-break.

The decider also went the distance, with Pliskova able to finally put Vekic away 6-2 6-7 (5-7) 7-6 (7-5) to book her clash with Swiatek.

Coco Gauff perhaps paid the price for taking almost three hours to beat Veronika Kudermetova on Wednesday, as the fifth seed fell to a straight-sets loss to Anastasia Potapova on Thursday, going down 6-2 6-3.

Fourth seed Caroline Garcia will go up against Potapova next after she defeated Tatjana Maria 7-6 (7-5) 6-4, while Paula Badosa had few problems seeing off fellow Spaniard Cristina Bucsa 6-1 6-2 and will face second seed Aryna Sabalenka in the last eight.

Paula Badosa believes she can break back into the world's top three after cruising past Daria Kasatkina at the Porsche Tennis Grand Prix, where Emma Raducanu crashed out on Tuesday.

Seventh seed Kasatkina had no answers in Stuttgart as she fell to a 6-1 6-1 defeat against Badosa, who recorded the ninth top-10 victory of her career and first in exactly 12 months.

Badosa has won 29 clay-court matches in the last three seasons – only Ons Jabeur (35) and Iga Swiatek (30) have won more – but the Spaniard had to enter this tournament as a wildcard.

The 25-year-old was as high as second in the world last year but has fallen to 31st, and she outlined her goal to reach the top once more after her first-round win set up an all-Spanish meeting with Cristina Bucsa.

When asked about her ambitions to return to the world's top three, Badosa said: "That's what I'm working on every day. That's one of my goals – I want to be back on the top.

"I like to play big matches, I like to be in the last rounds of the tournaments. I still know I have that level. I still know I was that player. I still believe in myself, and I hope I'm back there very soon."

Jelena Ostapenko eased into the second round with similar dominance after downing Raducanu 6-2 6-1 in just 58 minutes, teeing up a meeting with world number four Ons Jabeur on Wednesday.

Latvian Ostapenko powered 19 forehand winners and went unbroken, acknowledging in her on-court interview that familiar aggression was key to her success in the battle of two one-time grand slam winners.

"I knew against her the main thing was to step in the court," said former French Open winner Ostapenko. "I missed some balls, but I tried to be aggressive all the time when it was possible.

"Just try to take the ball early, don't give her many chances. And finally, I'm back on clay, my favourite surface."

Barbora Krejcikova was another straight-sets winner, scoring a 6-2 6-0 triumph over Liudmila Samsonova, with the reward for the 2021 Roland Garros champion being a tricky clash against second seed and Australian Open winner Aryna Sabalenka.

There was no such ease for Anastasia Potapova in a battling 6-3 3-6 7-6 (7-4) victory over Petra Martic, the Russian's ninth third-set win in 2023 – no WTA Tour player has managed more.

Tatjana Maria overcame Ylena In-Albon 6-2 4-6 7-6 (7-4) in another enticing clash, while Beatriz Haddad Maia advanced after Martina Trevisan was forced to retire when trailing 7-5 1-1 due to a right thigh injury.

Iga Swiatek will open the defence of her Stuttgart Open title against Qinwen Zheng after the world number 25's 6-4 6-4 win over Alycia Parks on Monday.

Lucky loser Parks hit eight aces but also 11 double-faults and was undone once in each set as Zheng took a straight-sets victory to tee up a second-round clash with the world number one.

Cristina Bucsa came up with a third-set bagel to join Zheng in round two, having initially made hard work of fellow qualifier Tamara Korpatsch in her 3-6 6-4 6-0 win.

Bucsa will meet the winner of the clash between seventh seed Daria Kasatkina and last year's semi-finalist Paula Badosa.

Meanwhile, Donna Vekic will take on either Karolina Pliskova or Maria Sakkari after she battled to a 7-6 (9-7) 7-6 (7-5) triumph over Ekaterina Alexandrova.

The star-studded line-up sees grand slam winners including Emma Raducanu, Barbora Krejcikova and Jelena Ostapenko get their campaigns underway on Tuesday.

Ons Jabeur, who claimed victory at the Charleston Open earlier this month, kicks off her tournament on Wednesday.

WTA tournaments will return to China later this year after being suspended since late 2021 due to concerns around the safety of player Peng Shuai.

Peng posted claims on Chinese social media site Weibo in November 2021 that she had been sexually assaulted by the former Chinese vice-premier, Zhang Gaoli, before disappearing from public view and later denying making the allegations in a video interview posted by a Singaporean Chinese-language newspaper.

The situation led to widespread concern for Peng's wellbeing, initiating the #WhereIsPengShuai campaign, with the WTA going as far as suspending Chinese tennis tournaments.

The organisation called on the Chinese authorities to investigate the matter, but has now accepted that those requests "will not be met".

"We've been in this for 16 months and we are convinced that at this point our requests will not be met," chief executive Steve Simon said to BBC Sport.

"To continue with the same strategy doesn't make sense and a different approach is needed. Hopefully, by returning, more progress can be made."

He added: "We've achieved some assurances from people that are close to Peng that she's safe and living with her family in Beijing.

"We do also have some assurances that there won't be any issues with our players and staff while they are competing in China. And hopefully we have received some respect for the stance we took.

"We haven't seen anyone else take a stance such as we did. There hasn't been any other sporting leagues or any business that have. We took that strong stance, we stand behind it."

The final two months of the season will be "very similar" to the pre-pandemic year of 2019, according to Simon, when eight tournaments were played in China from the start of September.

The 10-year deal for the season-ending WTA Finals to be held in Shenzhen will also resume.

World number five Ons Jabeur secured her first title of the season on Sunday with a 7-6 (8-6) 6-4 victory over Belinda Bencic in the Charleston Open final.

Jabeur, 28, enjoyed the best campaign of her career in 2022 as she reached the finals of Wimbledon and the US Open, but she was sidelined due to knee trouble following this year's Australian Open.

The Tunisian returned with early exits at both the Indian Wells Open and Miami Open, meaning she came into Charleston without consecutive wins since early January.

But she looked right back to her best at the WTA 500 event, not dropping a set the entire tournament.

After beating Lesia Tsurenko, Caroline Dolehide, Anna Kalinskaya and Daria Kasatkina to reach the final, Jabeur had to respond to early adversity against Bencic as the Swiss secured a break in the opening game of the first set.

Down 5-4 in the opener, Jabeur broke back at the last opportunity to keep the set alive, and after falling 6-4 behind in the tie-break she rattled off the next four points in a row to steal it.

The second set was all about making the most of her chances, as Jabeur only had three break-point chances compared to Bencic's five, but she was able to convert all three while Bencic could only snag two.

The final was a rematch from last year's Charleston Open title match, where Bencic prevailed over Jabeur in three sets, and it is Jabeur's first title since the German Open in June, where she again had to overcome Bencic in the final.

Jabeur now leads their head-to-head 3-2 in matches played at WTA Tour level.

Second seed Ons Jabeur secured a berth in a second successive Charleston Open final after triumphing 7-5 7-5 in a tight battle with third seed Daria Kasatkina.

Jabeur trailed a break in both sets but won in 109 minutes, aided by a three-hour rain delay at 5-3 down in the first frame allowing her to re-group.

The Tunisian had been a double break down at 4-1 in the first set, with Jabeur breaking Kasatkina when she served for the set at 5-2.

Jabeur's progress means she has reached her 11th WTA level final, this marking her first since the 2022 US Open which she lost to Iga Swiatek.

Jabeur lost last year's Charleston final to Belinda Bencic and the two may face off again in this year's decider, with the Swiss fourth seed leading top seed Jessica Pegula 7-5 6-6 (2-4) before rain forced their semi-final to be postponed until Sunday.

Bencic looked to have blown a 5-2 first-set lead, failing to serve out the opening frame before Pegula squared it up. But Bencic held serve, then broke Pegula to love to claim the lead.

There were breaks in the opening two games of the second set before it went to serve, until rain intervened with Pegula having a slight advantage in the tiebreaker.

Play will resume on Sunday not before 1:30pm local time, with the final scheduled for Sunday evening.

Second seed Tatjana Maria advanced to her second straight Copa Colsanitas final in Bogota, winning 6-3 6-4 over Briton Francesca Jones.

Maria will face either Peyton Stearns or Kamilla Rakhimova in Sunday's final.

The stage is set for a star-studded final weekend at the Charleston Open as top four seeds Jessica Pegula, Ons Jabeur, Daria Kasatkina and Belinda Bencic all advanced to the semi-finals on Friday.

It is the first time since the 2012 Stuttgart Open that all four top seeds reached the final four in a WTA 500 event.

Pegula, the top overall seed and the only remaining American, used her commanding serving game to overwhelm 12th seed Paula Badosa 6-3 7-6 (8-6).

She ended up winning 80 per cent of her accurate first serves – compared to 57 per cent for Badosa – and it resulted in the Spaniard producing just one break point opportunity in the match, which she could not take.

Pegula will meet fourth seed and Olympic gold medallist Belinda Bencic next after her relatively comfortable 6-3 6-3 triumph against Russia's Ekaterina Alexandrova.

Switzerland's Bencic needed just 80 minutes to get the job done, creating 12 break point chances compared to Alexandrova's two, while winning the first three games of each set.

After coming into the tournament without consecutive wins since early January, reigning Wimbledon and US Open finalist Ons Jabeur looked back to her best in a dominant 6-0 4-1 (retired) drubbing of Anna Kalinskaya.

Jabeur is yet to lose a set in Charleston, and she will try to keep that the case when she faces Daria Kasatkina in her semi-final.

Kasatkina earned her spot in the final four with Friday's only three-setter, emerging victorious 6-7 (5-7) 6-4 6-2 against Madison Keys in just over two and a half hours.

World number three Jessica Pegula was pushed all the way before emerging victorious 7-5 4-6 6-4 against Irina-Camelia Begu in Thursday's Charleston Open third round.

Pegula, the top-ranked American and the tournament's overall top seed, may have thought it was going to be smooth sailing after collecting a break-to-love in the match's opening game, but it was just the beginning of a two-hour-and-32-minute battle.

Begu played terrific tennis against a world-class opponent, winning 47 per cent of the match's total points, but she shot herself in the foot with eight double faults while Pegula had just one.

With the victory, Pegula booked her place in the quarter-final against Spain's Paula Badosa after her stylish 6-1 6-3 result over Russian 19-year-old Diana Shnaider.

Badosa now has a 4-2 record since the beginning of March, but both of those losses came to the in-form Elena Rybakina in eliminations from both the Indian Wells Open and the Miami Open.

Meanwhile, reigning Wimbledon and US Open finalist Ons Jabeur needed just 82 minutes to dispatch Caroline Dolehide 6-3 7-5, and combined with her opening victory against Lesia Tsurenko it is Jabeur's first consecutive wins since the Adelaide International in early January.

Jabeur will play Anna Kalinskaya in her quarter-final after the Russian upset two-time Australian Open champion Victoria Azarenka 6-4 7-6 (7-5).

It was a strong day for the Russians, as Ekaterina Alexandrova got the better of Julia Grabher 6-4 6-2, and world number eight Daria Kasatkina knocked out Bernarda Pera 6-3 7-6 (7-3).

Olympic gold medalist Belinda Bencic won the longest match of the day in a two-hour-and-45-minute war of attrition against Shelby Rogers 4-6 7-5 6-2, but the Americans had something to cheer for in the late window as Madison Keys advanced past Magda Linette 6-2 3-6 6-1.

Top seed Jessica Pegula cruised into the Charleston Open third round with a straight-sets victory over Anna Blinkova on Wednesday.

The American world number three triumphed 6-2 6-0 in 65 minutes, winning the second set to love in 27 minutes.

Blinkova, who is ranked 63rd in the world, was no match for Pegula, who won 71 per cent on first serve and 65 per cent on her second. Pegula also generated 10 break points, winning 71 per cent on the Russian's second serve.  

The American will take on Romanian 15th seed Irina-Camelia Begu in the round of 16, after she toppled resurgent 2020 Australian Open winner Sofia Kenin 6-1 6-4.

Defending champion and fourth seed Belinda Bencic triumphed in the evening session, breezing past Canada's Katherine Sebov 6-0 6-3 in 62 minutes.

Bencic will meet Shelby Rogers in the third round with the American edging countrywoman Caty McNally 6-7 (4-7) 7-5 6-1.

Ninth seed Madison Keys beat Hailey Baptiste 6-1 6-2, setting up a third-round clash with eighth seed Magda Linette who got past Varvara Gracheva 6-7 (3-7) 7-5 6-4.

Third seed Daria Kasatkina defeated Madison Brengle 6-2 6-1, progressing to face 38th ranked American Bernarda Para who beat Cristina Bucsa 6-3 6-4.

Spaniard Paula Badosa won 7-5 7-6 (8-6) over 2021 US Open runner-up Leylah Fernandez and will face Diana Shnaider who upset fifth seed Veronika Kudermetova 6-4 6-3.

Eugenie Bouchard's campaign at the Copa Colsanitas was halted in the second round with a 6-0 6-7 (7-9) 6-4 loss to fourth seed Kamilla Rakhimova.

World number five Ons Jabeur is through to the third round of the Charleston Open after making a winning start in a 6-3 6-3 triumph over Lesia Tsurenko on Tuesday.

Jabeur, a finalist at both Wimbledon and the US Open this past season, received a bye through to the second round thanks to her status as the second seed, and she had to save three break points in the opening game of the match against Tsurenko.

After repelling the early push, Jabeur rattled off the first five games to take a commanding lead, and she secured another break to begin the second frame.

Meanwhile, with half of the field still completing their first-round matchups, 12th seed Paula Badosa proved too strong for Egypt's Mayar Sherif in a comfortable 6-3 6-1 victory.

Spain's Badosa will play Canada's Leylah Fernandez in the second round after the promising 20-year-old took just 72 minutes to dispatch Russia's Evgeniya Rodina 6-3 6-2.

Rodina was the only loss from the four Russians in action on Tuesday, with Anna Kalinskaya defeating Alize Cornet 7-6 (7-4) 4-6 6-2, 19-year-old Diana Shnaider eliminating Alycia Parks 6-4 6-3, and Varvara Gracheva prevailing 7-6 (7-3) 6-2 against Anna-Lena Friedsam.

Bernarda Pera advanced past Clare Liu 6-4 6-7 (1-7) 6-3 in one of the all-American showdowns, while ninth seed Madison Keys beat Emma Navarro 6-4 6-3 and Shelby Rogers took out Danielle Collins 6-7 (2-7) 6-4 6-1 in the others.

Sofia Kenin, the 2020 Australian Open champion, handled the challenge of Aliaksandra Sasnovich 6-1 6-7 (5-7) 6-1, and two-time Australian Open champion Victoria Azarenka came back to defeat Sloane Stephens 3-6 6-3 6-2.

Former world number three Elina Svitolina's first game back on the WTA Tour in more than 12 months ended in a near three-hour defeat to Yulia Putintseva in the Charleston Open first round on Monday.

Svitolina, 28, had been off the tour for a combination of injury and pregnancy, but was back in action for the first time since giving birth to her and male tennis player Gael Monfils' daughter Skai in October.

The Ukrainian, who reached both the Wimbledon and US Open semi-finals in 2019, won the first set after rallying back from 3-1 down in a tie-break

But the Kazakh world number 47 responded and prevailed 6-7 (3-7) 6-2 6-4 in two hours and 48 minutes, with Putintseva sapping her opponent's energy with frequent drop shots.

Former Australian Open champion Sofia Kenin was on track for victory in a topsy-turvy clash with Aliaksandra Sasnovich before rain intervened, forcing it to be re-scheduled for Tuesday with the American leading 6-1 6-7 (5-7) 3-0.

World number 50 Sloane Stephens fought back after an early scare to beat qualifier Louisa Chirico 3-6 6-1 6-2, while Alize Cornet breezed past Fiona Crawley 6-0 6-2.

Jil Teichman was one of three seeds to lose in the first round, going down 6-2 3-6 6-2 to 17-year-old Linda Fruhvirtova.

Ukrainian 11th seed Anhelina Kalinina lost 7-6 (8-6) 6-4 to Anna Kalinskaya, while 10th seed Zhang Shuai was beaten 6-4 1-6 6-3 by Julia Grabher.

Eugenie Bouchard returned for the first time since the 2023 Australian Open due to injury with a win over Ylena In-Albon 6-3 6-2 at the Copa Colsanitas in Bogota.

Third seed Nuria Parrizas Diaz was knocked out by Briton Francesca Jones, who is ranked 817th in the world, 7-6 (7-3) 6-1 in a major shock.

Elena Rybakina's superb run in the United States was ended by Petra Kvitova, who won 7-6 (16-14) 6-2 to clinch the Miami Open title.

Two-time grand slam champion Kvitova, 33, became the second-oldest Miami champion, denying young gun Rybakina a Sunshine Double in the process.

Rybakina, fresh from her triumph at the Indian Wells Open, has been in stunning form but could not find her groove on Saturday.

After clinching the first set following a marathon tie-break, Kvitova took momentum into the second, cruising into a 5-2 lead before sealing the win with a break – Rybakina sending a forehand long.

Kvitova equalled Simona Halep as the players with the third-most WTA 1000 titles (nine), with only Serena Williams (13) and Victoria Azarenka (10) having won more since 2009.

"It feels unbelievable. I'm 33, and it's my 30th title, so I'm very happy," Kvitova told Amazon Prime Sport.

"I didn't think, that was the key. Elena didn't lose a tie-break [this season]. I thought, well, she has to lose at some time. I had to be a bit more aggressive, it was a bit of a struggle. I was a bit nervous, yes.

"I would have laughed [if someone told me I was going to win] but it feels great for sure. Nobody expected this, not me, not my team. I'm happy I'm injury free and, oh my God, I made it."

Kvitova is the second woman to win the singles title in Miami after turning 33, following Serena Williams in 2015.

Indeed, only Serena Williams (68), Justine Henin (42), Venus Williams (40), Kim Clijsters (40) and Maria Sharapova (36) have more WTA singles title to their name in the 21st century than the Czech.

Rybakina, meanwhile, will lament the chance of a Sunshine Double going begging.

The 23-year-old is the fourth player to fail to win the Sunshine Double in Miami's final after Serena Williams (1999), Lindsay Davenport (2000) and Sharapova (2006 and 2013).

"I want to congratulate Petra for a great two weeks here in Miami, and good luck for the rest of the year," said Rybakina. "Thank you to my team, we'll keep going."

Petra Kvitova is through to her 41st WTA singles final after defeating Sorana Cirstea 7-5 6-4 in Friday's Miami Open semi-final.

Kvitova, 33, already has 29 singles titles under her belt, including eight at the WTA 1000 level. Despite showing she can still compete with the best – making the final at the 2019 Dubai Championships, the 2020 Qatar Open and the 2022 Cincinnati Open, her last WTA 1000 victory came at the 2018 Madrid Open.

Against Romania's Cirstea – who came into the contest with nine wins from her past 10 matches – Czech veteran Kvitova was put on the back foot early as her serve was broken to go 5-2 down.

But she saved two set points, and used that momentum to ignite a run of seven consecutive games, taking the first set and the early break in the second as a result.

Kvitova did not allow Cirstea to produce a single break point opportunity in the second set, winning 75 per cent (21-of-28) of her total service points to slam the door shut.

With the win, Kvitova joined Chris Evert and Serena Williams as the only women to ever reach the Miami Open final after turning 33 years old, booking her place against the hottest talent on the tour – Elena Rybakina – in the decider.

Rybakina has won her past 13 matches, and is looking to become the fifth woman to ever complete the Sunshine Double after eliminating both world number one Iga Swiatek and world number two Aryna Sabalenka to lift the Indian Wells Open title.

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. 

Elena Rybakina moved one win away from completing the 'Sunshine Double' and did so on the back of a serving feat last achieved by Serena Williams almost seven years ago.

Reigning Wimbledon champion Rybakina battled past Jessica Pegula in the semi-finals of the Miami Open, scoring a 7-6 (7-3) 6-4 win to book a clash with Petra Kvitova or Sorana Cirstea in the title match.

In doing so, Rybakina set up the chance of sealing an Indian Wells and Miami back-to-back double, a feat that only four women have pulled off before: Steffi Graf (1994, 1996), Kim Clijsters (2005), Victoria Azarenka (2016) and Iga Swiatek (2022).

She also becomes just the sixth woman to appear in the finals of the Australian Open, Indian Wells and Miami in the same year after Monica Seles (1991), Graf (1994), Lindsay Davenport (2000), Martina Hingis (2000) and Maria Sharapova (2012).

The Williams accomplishment that Rybakina has matched stands as testament to the Kazakhstani player's serving prowess.

She has served at least 10 aces in each of her five matches in Miami, and Williams at Wimbledon in 2016 was the last player from the WTA Tour to serve 10-plus aces in five matches in a single tournament.

Rybakina lost to Aryna Sabalenka in the Australian Open final in January but has put that behind her and enjoyed a stellar March. She beat Swiatek in the Indian Wells semi-finals before toppling Sabalenka in the final, and now another chance of a trophy awaits.

Discussing the challenge of completing the hard-court US double, Rybakina said: "It's really difficult, and because of different conditions in these two weeks by the matches you could see that it's much more difficult for me here than even in Indian Wells.

"It's just the finals, still close but the same time far. The Sunshine Double, I try my best, and hopefully I can make it. I didn't expect to be in the final. I knew that it was going to be very tough from the beginning, from the first match. And it was, actually. First two matches was really tough."

She came through dicey three-setters against Anna Kalinskaya and Paula Badosa before kicking on, winning in straight sets against Elise Mertens, Martina Trevisan and Pegula.

"Actually, the whole two weeks were really tough," Rybakina said after seeing off Pegula late on Thursday. "I'm happy to be in another final."

With her runs in Indian Wells and Miami, the Russian-born 23-year-old has already won 13 main-draw matches at WTA 1000 level in 2023, matching her personal best for an entire season, achieved last year.