World number five Jessica Pegula clinched a berth in her second WTA final of the year with a straight-sets victory over Victoria Azarenka at the Guadalajara Open on a rainy Saturday.

Pegula defeated the former world number one Belarussian 7-6 (7-3) 6-1 in one hour and 29 minutes, having fought back from a 4-1 first-set deficit.

The American will need to wait until Sunday to learn her opponent, with rain forcing Maria Sakkari and Marie Bouzkova's semi-final to be suspended and eventually postponed with the Greek leading 7-5.

Pegula's triumph was her 40th win of the season, becoming the 10th American woman to achieve that feat.

The victory also made it four successive Grand Slam winners that Pegula has overcome to reach the final in Guadalajara, knocking off Sloane Stephens, Bianca Andreescu and Elena Rybakina along with Azarenka.

Pegula converted three of eight break points, while Azarenka took her only break point of the match to help her open up the 4-1 first-set lead.

The American proved better on her second serve, while she managed to win 15 of 26 points on Azarenka's second serve.

Sakkari and Bouzkova's semi-final will resume at 1pm local time on Sunday, with the fourth seed leading 7-5 after an epic first set that lasted 84 minutes.

The Greek showed off her grit after fluffing an early 3-1 lead by taking her eighth set point, winning a 22-shot rally - the longest of the first set - to break Bouzkova in the 12th game.

The final is due to commence no earlier than 6pm local time on Sunday, meaning it will be a physical test for the victor.

Maria Sakkari secured the eighth and final place at the WTA Finals after defeating Veronika Kudermetova 6-1 5-7 6-4 to reach the semi-finals at the Guadalajara Open on Friday.

The WTA Finals – which is contested by the women who finish top-eight for the season in ranking points – already had seven entrants locked in, with the eighth to be decided by the winner between world number six Sakkari and world number 12 Kudermetova.

Sakkari's ability to fight her way out of tough situations proved to be the difference as she saved 14 of the 15 break points she faced, while converting three of her nine chances. In the deciding third set, Sakkari made the most of her only break point, while saving all five of Kudermetova's chances to get back into the contest.

She will play Marie Bouzkova in the semi-final after the unseeded Czech was the beneficiary of Anna Kalinskaya's injury retirement in the first set, with Bouzkova leading 5-2.

It continues a terrific run of form for the 24-year-old Bouzkova, who is 19-3 in her past 22 matches, with her only losses in that span coming against world number 20 Karolina Pliskova, Wimbledon champion Elena Rybakina and world number two Ons Jabeur.

On the other side of the draw, Jessica Pegula breezed through the challenge of Sloane Stephens to win 6-2 6-2, which would have set up a tantalising all-American matchup against her doubles partner and rising star Coco Gauff, but she could not hold up her end of the bargain.

Gauff fell 7-6 (7-2) 4-6 6-3 to Victoria Azarenka, giving the Belarusian her third consecutive top-20 win after earning her spot in the quarter-final with victories over world number eight Paula Badosa and world number 15 Madison Keys.

American teenager Coco Gauff showed why she deserves to be at this year's WTA Finals with a commanding 6-0 6-3 victory over Martina Trevisan at the Guadalajara Open.

The fifth seed clinched her maiden spot at the season-ending WTA Finals on Wednesday and backed that up by securing her third WTA 1000 quarter-final on Thursday.

Gauff reeled off the first nine games of the match against Trevisan, where she triumphed in one hour and one minute. The 18-year-old came under pressure from Trevisan, who generated nine break points for the match but Gauff saved all bar one of them.

World number one Iga Swiatek (47) is the only player to have won more matches this year in straight sets than Gauff (32).

Gauff will face Victoria Azarenka in the quarter-finals after the Belarusian toppled 13th seed Madison Keys 6-4 6-7 (4-7) 6-1 in two hours and 13 minutes.

Two-time Australian Open winner Azarenka swept aside Keys in 32 minutes in the third set after a titanic battle in the opening two frames, winning 26 of the 37 final-set points. Azarenka's quarter-final appearance is her 34th since 2009, with only four players having more during the span; Agnieszka Radwanska (42), Simona Halep (39) and Caroline Wozniacki (36).

Third seed Jessica Pegula advanced to the last eight with a 6-4 6-4 victory over former US Open champion Bianca Andreescu. 

The American, who survived three match points against Elena Rybakina on Wednesday, trailed early against the Canadian but took control of the match. Pegula will face Sloane Stephens in the quarter-finals after she toppled 2022 US Open semi-finalist Caroline Garcia 7-6 (8-6) 7-5.

On the day her WTA Finals berth was confirmed, seventh seed Daria Kasatkina lost 6-2 2-6 6-3 to Anna Kalinskaya in two hours and 14 minutes.

Fourth seed Maria Sakkari fought back to win 5-7 6-3 6-3 over 14th seed Danielle Collins, while Marie Bouzkova copped a bagel before triumphing 0-6 7-5 6-3 over Liudmila Samsonova.

Sakkari will next meet eighth seed Veronika Kudermetova who beat Jelena Ostapenko 6-4 6-4. Bouzkova will take on Kalinskaya in the last eight.

It was a great day for the highly ranked Americans at the Guadalajara Open on Wednesday, headlined by world number five Jessica Pegula and her 2-6 6-3 7-6 (10-8) comeback win over Wimbledon champion Elena Rybakina.

Pegula, who is now locked into the top-eight and therefore will qualify for the WTA Finals, struggled to win points on her serve in the opening set, but raised her 57 per cent success rate up to 69 per cent in the second set, and 66 per cent in the decider.

The American had to come from a break down in the second set to keep her tournament alive, and she will now face Canada's Bianca Andreescu in the third round.

Meanwhile, fellow United States star Coco Gauff was too good for Italy's Elisabetta Cocciaretto, winning 7-6 (7-1) 6-3 to book a third-round clash with another Italian, Martina Trevisan, who earned her way there with a 6-0 4-6 6-3 win over Katerina Siniakova.

The other two seeded Americans were also successful, with 13th seed Madison Keys coming from a set down to defeat Ajla Tomljanovic 3-6 6-4 6-3, and 14th seed Danielle Collins repelled the challenge of Magdalena Frech 6-3 6-4.

There were positive signs for former world number five Eugenie Bouchard, who ended up losing, but showed she still has her talent by taking a set off world number 23 Jelena Ostapenko in a 7-5 2-6 6-1 result.

Russian pair Anna Kalinskaya and Liudmila Samsonova both emerged in three-set outings, with Kalinskaya outlasting Elise Mertens 6-4 0-6 7-5, while Samsonova upset world number four Aryna Sabalenka 6-4 2-6 6-2.

World number 12 Veronika Kudermetova kept her WTA Finals hopes alive with a 6-4 7-5 win over Donna Vekic, and the Czech Republic's Marie Bouzkova ousted Colombia's Camila Osorio 6-3 6-1.

In the late window, Sloane Stephens eliminated Olympic gold medalist Belinda Bencic 6-4 6-4, and top overall seed Paula Badosa retired due to injury after losing the first set 6-2 against Victoria Azarenka.

Victoria Azarenka has booked a clash with the top seed of the Guadalajara Open after defeating Elina Avanesyan 6-4 6-2 in Monday's opening round.

In the last event of the season before the WTA Finals, Belarus' Azarenka was too strong with her return game for her Russian opponent, winning 53 per cent (32-of-60) of her return points while capitalising on five-of-seven break point opportunities to earn a shot at world number eight Paula Badosa.

While Azarenka has no chance of qualifying for the WTA Finals – with only the top-eight players in the rankings making it through – Belinda Bencic is one of the players who can sneak in with a great result this week.

Needing to make the semi-finals to have a chance, she got off on the right foot with a 7-5 6-7 (10-12) 6-3 win against Leylah Fernandez in her opening match.

Petra Kvitova can also qualify if she reaches the final, and she started without issue, defeating Bernarda Pera 6-3 7-5.

Ekaterina Alexandrova had an outside chance of claiming a WTA Finals spot if she won this tournament, but she was the victim of the day's biggest upset, falling 6-4 7-6 (10-8) to Camila Osorio.

At 22nd in the world, Liudmila Samsonova is the lowest-ranked player in the field with a mathematical chance at qualification, but she is a step closer after handling Kaia Kanepi 6-1 7-5.

Despite Fernandez's earlier loss, it was a strong day for the Canadians, with Bianca Andreescu proving too good in her 6-2 6-4 victory against Jil Teichmann, and Rebecca Marino also only needed two sets to defeat Ann Li 6-2 7-6 (7-2).

China's Lin Zhu came from a set behind to beat France's Alize Cornet 3-6 6-3 6-4, while Ukraine's Marta Kostyuk had a much quicker result in her 6-1 6-3 triumph over Belarus' Aliaksandra Sasnovich.

World number 34 Elise Mertens had no problems in one of the biggest mismatches of the day as she defeated world number 185 Asia Muhammad 6-3 6-2, and Sloane Stephens needed only 54 minutes to advance 6-0 6-2 past Linda Fruhvirtova.

In the last match of the night, Mexico's top chance Fernanda Contreras Gomez was eliminated by Alja Tomljanovic 6-2 6-1.

Elena Rybakina advanced to the last 16 at the Ostrava Open on Monday, but fellow former grand slam winner Victoria Azarenka exited at the first hurdle.

Rybakina, who has struggled for consistency since victory at Wimbledon earlier this year, came back from a set down to dispatch Madison Keys with a 5-7 6-3 6-3 win.

She could face eighth seed Jelena Ostapenko in the next round, but one name not in the draw will be Azarenka, who could not claw back victory against Ekaterina Alexandrova in a 6-4 4-6 2-6 defeat.

Alexandrova is in line to play either Emma Raducanu or Daria Kasatkina in the next stage.

Meanwhile, top seeds Iga Swiatek and Paula Badosa earned the identity of their opponents after receiving first-round byes.

Swiatek will play Ajla Tomljanovic, who progressed in straight sets against Zhang Shuai, as Badosa faces Petra Kvitova, who was made to work a little harder in three by Bernarda Pera.

At the Jasmin Open, third, fifth and seventh seeds Alize Cornet, Elise Mertens and Katerina Siniakova each advanced with respective straight-sets routs of Laura Pigossi, Jaqueline Cristian and Chloe Paquet – the latter retiring as she trailed 4-0 in the second set.

But eighth seed Magda Linette is out after letting an early lead slip against Lucrezia Stefanini, who celebrated a 2-6 6-4 6-4 victory.

Victoria Azarenka says vulnerable young female tennis players are "getting taken advantage of" as she called for improved safeguarding in the sport.

The Belarusian, who sits on an eight-person WTA players council, was speaking after Frenchwoman Fiona Ferro accused her former coach Pierre Bouteyre of rape and sexual assault.

Bouteyre strongly denied the allegations, with his lawyer telling AFP that he "recognises the relationship occurred but denies any coercion."

Speaking after her US Open victory over Petra Martic, Azarenka called for increased protection and says she would have a "very big concern" if she had a daughter who wanted to play professional tennis.

"It's a very sensitive subject because you won't hear those stories unless players come out and tell those stories," Azarenka said. "It happens right and left on the tour, which is unfortunate.

"Our job is to be better at safeguarding. As player council, it's almost like the number one subject to us. Because we see those vulnerable young ladies getting taken advantage of in different situations.

"It's really sad and really makes me emotional because I have a son [and] I don't see that happening so much on the men's tour.

"If I had a daughter, I would have to question would she want to play tennis, that would be a very big concern in that way for me.

"[The] recent story with Fiona Ferro that came out. I don't know how to put it in words sometimes. All you can do is check in on the person and kind of give your hand what I can do, what I can help with.

"I applaud her for being brave. I hope this situation she's gonna come out of it stronger and tennis is not ruined for her because of that. That's I think [a] very, very heavy topic.

"But it's the topic that has to come out more, and I think it's [journalists'] job also to not expose it. It sounds pretty weird when I say that, but do the research, help people to open up more.

"It's hopefully one by one [as we] try to eliminate that type of situation."

Iga Swiatek suggested there has been a lack of leadership at the top of tennis in how to deal with Russia's invasion of Ukraine after Victoria Azarenka was shunned by Marta Kostyuk at the US Open on Thursday.

Ukrainian Kostyuk elected not to shake hands with Azarenka following a second-round defeat at Flushing Meadows, instead merely tapping rackets.

That came after Kostyuk criticised the Belarusian for participating in a charity match for Ukraine, before the United States Tennis Association announced she would no longer be involved.

Belarus maintains close ties with Russia and has been under sanction from western nations for supporting Vladimir Putin after the Russian invasion of Ukraine in March.

Both situations led to a frosty atmosphere following the conclusion of the tie, which Azarenka won 6-2 6-3.

Asked if anything could be done to address tensions between players on the tour, world number one Swiatek, who booked her place in the third round with a 6-3 6-2 win over Sloane Stephens, said: "Well, basically I think it's already too late. I mean, it's never too late, you know, but I think the best time for ATP or WTA to do anything was when the war started, and where the tension was pretty big in the locker rooms.

"I think right now it's already pretty messed up, and maybe next time it's gonna be easier for us to handle it if somebody is going to guide us and somebody is going to even arrange some meetings between players and showing that we should be united.

"Even though there are countries who are invading other countries, we are tennis players. It's sad but it's not our fault that it's happening. Yeah, I think it would be much, much easier at the beginning to do that.

"Right now, it's kind of too late to fix that. But I think it's just in between players and their personal relationships how you're going to handle it and how you're going to communicate to each other.

"But from my case, right now it's easy to say that maybe there was lack of leadership, but at that time I didn't know what to do either. But there are smarter people than me, so they should kind of have an idea."

Victory over Stephens means Swiatek has now won 52 matches in 2022. The last players with more WTA-level wins in a single campaign were Ash Barty (57) and Kiki Bertens (55) in 2019.

Serena Williams is dominating the headlines, though, in what is likely to be her last tournament before retirement – a situation Swiatek is more than happy with. 

Asked if she felt like she was flying under the radar, Swiatek said: "Maybe a little bit, yeah, for sure. You can see the difference than on Roland Garros and on Wimbledon when I came back after winning Roland Garros.

"But I would say it doesn't really matter for me. If I'm going to play well and if I'm going to do my work on court, I know I will be fine in terms of everything that's going around.

"But, yeah, Serena totally deserves it and it's pretty obvious for me that she's going to be in the spotlight in this tournament. That's kind of her time right now. I'm just playing and focusing on that, and that's the most important thing for me."

Swiatek will face Lauren Davis in the next round after the American beat Ekaterina Alexandrova 0-6 6-4 7-6 (10-5). 

Victoria Azarenka was not concerned by being shunned by Marta Kostyuk at the US Open, adding that she has tried to contact the Ukrainian throughout the year.

Kostyuk elected not to shake hands with Azarenka following a second-round defeat at Flushing Meadows, instead merely tapping rackets.

That came after Kostyuk criticised the Belarusian for participating in a charity match for Ukraine, before the United States Tennis Association announced she would no longer be involved.

Belarus maintains close ties with Russia and has been under sanction from western nations for supporting Vladimir Putin after the Russian invasion of Ukraine in March.

Both situations led to a frosty atmosphere following the conclusion of the tie, which Azarenka won 6-2 6-3.

"Well, I wasn't surprised. I don't believe that making a big deal out of it is important. I always shake hands with my opponents. I had the same situation with [Dayana] Yastremska in Washington. It is what it is. I just move on. I cannot force anybody to shake my hand. It's their decision," Azarenka said in a press conference.

Asked if she had spoken to Kostyuk, Azarenka added: "I've offered many times through WTA, because I believe that there is a sort of sensitivity. I've been told that that's not a good time.  

"I don't have, or I never had a close relationship with Marta. I obviously knew who she is, but I've never practiced with her. I've never really had conversation with her.

"So in March when everything happened, I reached out to all the players that I personally know and I still have a good relationship with and, you know, I don't feel that forcing myself to speak to somebody who maybe doesn't want to speak to me for different reasons is the right approach. But I offered."

Kostyuk was asked about the decision not to shake hands and explained her reasons, saying she believed it was not "the right thing" in the current climate.

"I just don't think it's the right thing to do in the circumstances I'm in right now," she said.

"We had a great match, don't get me wrong. She's a great competitor, I respect her as an athlete but that has nothing to do with her being a human being."

Victoria Azarenka has played down the significance of being shunned by Marta Kostyuk at the US Open, adding that she has tried to contact the Ukrainian throughout the year.

Kostyuk elected not to shake hands with Azarenka following a second-round defeat at Flushing Meadows, instead merely tapping rackets.

That came after Kostyuk criticised the Belarusian for participating in a charity match for Ukraine, before the United States Tennis Association announced she would no longer be involved.

Belarus maintains close ties with Russia and has been under sanction from western nations for supporting Vladimir Putin after the Russian invasion of Ukraine in March.

Both situations led to a frosty atmosphere following the conclusion of the tie, which Azarenka won 6-2 6-3.

"Well, I wasn't surprised. I don't believe that making a big deal out of it is important. I always shake hands with my opponents. I had the same situation with [Dayana] Yastremska in Washington. It is what it is. I just move on. I cannot force anybody to shake my hand. It's their decision," Azarenka said in a press conference.

Asked if she had spoken to Kostyuk, Azarenka added: "I've offered many times through WTA, because I believe that there is a sort of sensitivity. I've been told that that's not a good time.  

"I don't have, or I never had a close relationship with Marta. I obviously knew who she is, but I've never practiced with her. I've never really had conversation with her.

"So in March when everything happened, I reached out to all the players that I personally know and I still have a good relationship with and, you know, I don't feel that forcing myself to speak to somebody who maybe doesn't want to speak to me for different reasons is the right approach. But I offered."

Kostyuk was asked about the decision not to shake hands and explained her reasons, saying she believed it was not "the right thing" in the current climate.

"I just don't think it's the right thing to do in the circumstances I'm in right now," she said.

"We had a great match, don't get me wrong. She's a great competitor, I respect her as an athlete but that has nothing to do with her being a human being."

Victoria Azarenka will not play in the Tennis Plays for Peace Exhibition at Flushing Meadows on Wednesday, the United States Tennis Association (USTA) has announced.

The former world number one was due to participate in the charity event set up in support of Ukraine ahead of next week's US Open.

The Belarusian's involvement in the exhibition came under scrutiny from Ukrainian player Marta Kostyuk, who subsequently declined the opportunity to compete alongside the likes of Rafael Nadal, Iga Swiatek and John McEnroe.

Azarenka had called for player unity following Russia's Belarus-assisted invasion of Ukraine earlier this year, with the two-time Australian Open winner saying Wimbledon's ban on Russian and Belarusian players made no sense.

Following the recent criticism led by Kostyuk, who was bemused by the presence of Azarenka, the USTA decided it would be in the best interest of the event if she was not involved.

In a statement, the governing body said: "In the last 24 hours, after careful consideration and dialogue with all parties involved, Victoria Azarenka will not be participating in our 'Tennis Plays for Peace Exhibition' this evening [Wednesday].

"Vika is a strong player leader and we appreciate her willingness to participate. Given the sensitivities to Ukrainian players, and the ongoing conflict, we believe this is the right course of action for us."

Despite being ranked fourth in the world, Paula Badosa came into her quarter-final showdown with the red-hot Coco Gauff as the underdog, but she played like a favourite en route to a 7-6 (7-4) 6-2 victory.

Usually one of her stronger weapons, Gauff's serve was a liability on Friday, with six double faults in the first set alone to drop the opening frame despite breaking Badosa twice.

In the second set, while Badosa was converting 92 per cent (11-of-12) of her accurate first serves into points, Gauff's figure was down at 53 per cent (eight-of-15) as the Spaniard's return game was at its best.

Badosa will meet seventh seed Daria Kasatkina in the semi-final after the Russian beat Belarus' Aryna Sabalenka 4-6 7-5 6-0. The longer the match went, the less effective Sabalenka became with her ability to return serve.

In the first set, which Sabalenka won, she was successful in 53 per cent (19-of-36) of the points against Kasatkina's serve, and that number plummeted to 14 per cent (two-of-14) in the decider.

Third seed and Wimbledon finalist Ons Jabeur was eliminated by ninth seed Veronika Kudermetova 7-6 (7-5) 6-2, and she will meet unseeded American Shelby Rogers in the second semi-final after she defeated Amanda Anisimova 6-4 6-4.

Meanwhile, in Washington at the Citi Open, Emma Raducanu felt the effects of her gruelling match 24 hours prior as she went down 7-6 (8-6) 6-1 to Liudmila Samsonova.

On Thursday, Raducanu played in the longest two-set match of the WTA season as she eventually made her way through two tiebreakers against Camila Osorio in two hours and 49 minutes, and she ran out of steam after another tough tie-break against Samsonova.

Samsonova will play China's Xiyu Wang in the semi-final after another upset, knocking out fourth seed Victoria Azarenka in convincing fashion 6-1 6-3.

Estonia's Kaia Kanepi booked her place in the second semi-final after a 6-7 (4-7) 6-4 6-3 win against Anna Kalinskaya, where she will meet Daria Saville after the Australian got the better of Canada's Rebecca Marino 6-1 7-5. 

World number one Iga Swiatek beat Victoria Azarenka 6-4 6-1 to progress to the quarter-finals of the Internazionali d'Italia in Rome on Thursday. 

Swiatek, who became the first female player to win 25 consecutive matches since Serena Williams in 2015, will face Bianca Andreescu in the last eight after she eased past Petra Martic 6-4 6-4.

"I didn't start well, and everybody could see that," Swiatek told reporters. "I'm really happy with the way I reacted and how I improved in the first set.

"Also how different the second set looked to the first one because I could really reset and really change the way I played. That's the most positive thing for me."

There was a shock in the final game of the day, though, as Daria Kasatkina dumped out number two seed Paula Badosa 6-4 6-4. 

Third seed Aryna Sabalenka sealed a third straight win over Jessica Pegula, easing to a 6-1 6-4 victory, while fourth seed Maria Sakkari defeated Coco Gauff 6-4 7-5.

Seventh seed Danielle Collins was knocked out by unseeded compatriot Amanda Anisimova, the 20-year-old cruising past the Australian Open finalist 6-2 6-2.

There were also victories for Jil Teichmann, who overcame Elena Rybakina 6-7 (3-7) 6-3 7-5, and ninth seed Ons Jabeur, who beat Yulia Putintseva 6-3 6-2.

Iga Swiatek and Paula Badosa progressed to the third round of the Internazionali d'Italia with ease as the former continued her impressive winning run on Wednesday.

Top seed Switaek, seeking a fifth consecutive title, breezed past Elena-Gabriela Ruse 6-3 6-0 as she became the first female player to win 24 consecutive matches since Serena Williams in 2015.

Badosa followed suit by dispatching Aliaksandra Sasnovich 6-2 6-1 in just an hour and 17 minutes, teeing up a third-round clash with Daria Kasatkina, who beat Leylah Fernandez 4-6 6-3 7-6 (7-2).

Aryna Sabalenka, the third favourite in Italy, also made light work of Zhang Shuai to triumph 6-2 6-0, while fourth seed Maria Sakkari cruised past Madrid Open semi-finalist Ekaterina Alexandrova 6-3 6-2.

Sakkari will next face a Rome rematch with Coco Gauff, who defeated compatriot Madison Brengle 6-2 6-4. Teenager Gauff's sole win against Sakkari came at this tournament in the second round last year.

Yulia Putintseva came from behind to beat Garbine Muguruza 3-7 7-6 (7-4) 6-1, and will next meet Ons Jabeur, who made it eight successive main-draw wins by defeating Ajla Tomljanovic 7-5 6-2.

Seventh seed Danielle Collins also battled past former world number one Simona Halep 7-6 (7-1) 6-3.

There was no such joy for fifth seed Anett Kontaveit as she crashed out to Petra Martic in straight sets, while Jil Teichmann upset former Rome champion Karolina Pliskova in a three-set thriller.

Belinda Bencic, who was ranked as 12th seed, was another early casualty as she fell to a 7-6 (7-4) 6-1 defeat against American Amanda Anisimova.

Meanwhile, Jessica Pegula secured her third-round spot after Anhelina Kalinina withdrew due to injury, with Victoria Azarenka earning a straightforward 6-2 6-4 victory over Camila Osorio to get a shot at favourite Swiatek in the next round.

Former world number ones Simona Halep and Victoria Azarenka advanced to the second round of the Internazionali d'Italia on Monday, while Coco Gauff scored an impressive win over Angelique Kerber. 

Halep was a 6-4 6-4 winner against Alize Cornet, who defeated her in the fourth round of the Australian Open in January, and will face seventh seed Danielle Collins next. 

It was only the Romanian's second win in her six matches against Cornet, though she needed two chances to serve out both sets. 

Azarenka needed just 68 minutes to see of Viktorija Golubic, dropping just five points behind her first serve and winning 12 out of 14 from the final three games to complete a 6-3 6-0 triumph. 

It only took Gauff two minutes more to see off the challenge of Kerber, who has now won just two of her eight matches on the WTA Tour this year.

Leylah Fernandez came from behind to claim an impressive 1-6 6-2 6-2 victory over 16th seed Anastasia Pavlyuchenkova, while Madison Keys went down 6-4 6-4 to Anhelina Kalinina. 

Aliaksandra Sasnovich's 3-6 7-6 (7-4) 6-1 win over Veronika Kudermetova secured her a second-round match against second seed Paula Badosa. 

Belinda Bencic overcame Elisabetta Cocciaretto 6-4 6-2, Shuai Zhang set up a match with Aryna Sabalenka by beating Martina Trevisan 6-4 6-2, and Petra Martic will face Anett Kontaveit after besting Karolina Muchova 6-2 3-6 6-1. 

There were also wins for Daria Kasatkina and Yulia Putintseva before rain interrupted Ajla Tomljanovic's match against Camila Giorgi when the Australian was 6-3 4-2 up.