Jessica Pegula cruised past US Open winner Coco Gauff in straight sets to book a spot in the championship match of the WTA Finals in Cancun, Mexico.

The American doubles partners duked it out against each other on a wet and windy Saturday evening, with Pegula easily coming out on top 6-2 6-1.

It is still not known who will face the 29-year-old in the final, as the semi-final between world number one Aryna Sabalenka and world number two Iga Swiatek was pushed back as more heavy rains rolled in four games into their match.

The game was put on pause with Swiatek leading 2-1 and Sabalenka serving at 30-all.

The duo could be seen both wrapping themselves in towels to brace against the weather as organisers waited almost two hours for the game to resume.

Eventually, the game was suspended as bleak conditions prevailed.

Belarusian Sabalenka and Poland’s Swiatek will resume play on Sunday, with the final rescheduled to Monday.

World number five Jessica Pegula defeated Greece’s Maria Sakkari in straight sets 6-3 6-2 in the WTA Finals, continuing her unbeaten run through the group stages.

Pegula had already secured her spot in Saturday’s semi-finals by beating both Sabalenka and Rybakina in her earlier matches in Mexico.

But the American is yet to drop a set so far this tournament and it took her just under 80 minutes to beat Sakkari, who failed to qualify for the semi-finals after losing all of her games.

Meanwhile, fighting for a spot in the semi-finals, world number one Aryna Sabalenka and world number four Elena Rybakina had their match suspended due to wet weather.

Sabalenka won the first set 6-2 in the Australian Open final rematch on a rain interrupted evening and had Rybakina on the ropes early in the second set.

But Rybakina fought back to take the lead 5-3 before the match was called off for the night, with play to resume on Friday.

Also on Friday, Iga Swiatek will take on Ons Jabeur while Coco Gauff plays Wimbledon champion Marketa Vondrousova to decide who makes the semi-finals.

Jessica Pegula produced an impressive display in the WTA Finals in Cancun, Mexico, as she beat world number one Aryna Sabalenka in straight sets.

Pegula broke her losing streak against the Belarusian having lost their last five meetings and the American has now won her last five games against top 10 players.

Sabalenka made 33 unforced errors, but it still took Pegula seven match points before clinching a 6-4 6-3 win and a place in the semi-finals.

After the match, Pegula said her improvement comes from feeling “more comfortable” playing top players this year.

Sabalenka will now play Elena Rybakina on Thursday night to determine the second qualifier from the group after Rybakina defeated Maria Sakkari 6-0 6-7 (4) 7-6 (2).

Rybakina started with a fury with a dominant first set but Sakkari fought her way back, winning the second set in a tiebreak.

Sakkari had two break point chances in the final set at 4-4, but Rybakina fought back and finished the tiebreak in a dominant fashion, skipping out to a 6-0 lead.

A number of players, including Sabalenka, Wimbledon champion Marketa Vondrousova and Iga Swiatek criticised the conditions of the courts in Cancun.

For the third year in a row, the host of the prestigious tournament – which features the top eight players of the season – was decided less than two months prior to the event.

World number one Iga Swiatek cruised into the last 16 of the Madrid Open with a straight-sets victory over Bernarda Pera on Sunday.

The three-time grand slam winner conceded the first break of the match three games in, but she responded brilliantly to that setback to wrap up a 6-3 6-2 win within 76 minutes.

Swiatek did not face a second break point in the match as she rediscovered her composure, continuing her French Open preparations as a barrage of big winners proved too much for Pera.

Speaking on court after her win, Swiatek said: "I wouldn't say it was easy. Every match is tricky here. 

"I'm happy that I'm getting into my rhythm. Playing against a lefty is never easy, but I'm pretty happy with that. I was disciplined and focused."

It was a day of few shocks in the Spanish capital, as third seed Jessica Pegula saw off a spirited challenge from Marie Bouzkova to emerge with a 6-4 7-6 (7-2) win.

Pegula will face Italy's Martina Trevisan for a quarter-final spot after she claimed a straight-sets win over another American player in Alycia Parks.

Meanwhile, Russian duo Veronika Kudermetova and Daria Kasatkina will meet in the next round after victories against Anastasia Potapova and Lesia Tsurenko respectively. 

Elena Rybakina made a second-round exit from the Madrid Open as a difficult start to the clay campaign continued for the Australian Open runner-up and Indian Wells champion.

After abandoning a last-16 clash with Beatriz Haddad Maia last week in Stuttgart due to a back injury, this time Rybakina lasted the distance against Anna Kalinskaya but suffered a 7-5 4-6 6-2 defeat. She had benefitted from a first-round bye but was found wanting on Friday.

World number 60 Kalinskaya got the better of the seventh-ranked Rybakina in two hours and 13 minutes, avenging a defeat at the same stage in Miami last month to her fellow Moscow-born player.

Iga Swiatek made no such mistake in her opening match, after also receiving a first-round bye, with the world number one posting a 6-3 6-2 win over Austria's Julia Grabher.

Swiatek led by an early break in the second set but was broken back; however, she was soon back in the ascendancy and made sure of a place in the last-32 stage of a tournament she elected to miss last year due to a minor injury.

Third seed Jessica Pegula was tested by Poland's Magdalena Frech, but the American came through 7-6 (7-5) 6-3 in an hour and 41 minutes. Pegula was runner-up to Ons Jabeur in last year's final.

Pegula's fellow US player, Alycia Parks, continued to catch the eye as the 22-year-old ousted 15th seed Victoria Azarenka, defeating the former world number one 6-2 7-6 (7-5).

Parks, who has rocketed from 150th in the rankings last November to 40th place on that list, now holds a 4-1 career winning record against opponents ranked inside the WTA's top 20.

Former French Open champion Barbora Krejcikova, seeded 11th, was tested by Danka Kovinic before powering through a deciding set to win 6-3 4-6 6-0 against the Montenegrin.

Eugenie Bouchard, meanwhile, was no match for Martina Trevisan, with the Italian running out a 6-2 7-5 winner from a clash with Canada's former Wimbledon runner-up.

Anastasia Potapova, Ekaterina Alexandrova, Daria Kasatkina, Veronika Kudermetova and Bernarda Pera were among other seeded winners as the last-32 line-up took shape, but 25th seed Jil Teichmann was beaten, going down 3-6 6-2 6-4 to Lesia Tsurenko.

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.

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.

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.

Elena Rybakina is now one win away from completing the Sunshine Double after defeating Jessica Pegula 7-6 (7-3) 6-4 in Thursday's Miami Open semi-final.

Only four women have ever claimed the Sunshine Double – which requires winning both the Indian Wells Open and Miami Open. Steffi Graf did it in both 1994 and 1996, Kim Clijsters did it in 2005, Victoria Azarenka accomplished the feat in 2016 and current world number one Iga Swiatek did it just 12 months ago.

Rybakina sent a message to the tennis world as she knocked out both world number one Iga Swiatek and world number two Aryna Sabalenka to take home the Indian Wells crown, and she has carried that form into Miami.

After prevailing in three-setters against Anna Kalinskaya and Paula Badosa, the Kazakhstan representative has now rattled off consecutive straight sets victories against Elise Mertens, Martina Trevisan and Pegula to extend her winning streak to 13 matches.

Against Pegula, Rybakina served 11 aces to the American's one, and in the process she became the first woman to serve at least 10 aces during five matches in the same tournament since Serena Williams back at Wimbledon in 2016.

By securing the first-set tiebreaker, Rybakina claimed her tour-leading seventh tiebreaker win of the season, with a perfect 7-0 record.

She will meet the winner between Petra Kvitova and Sorana Cirstea in the final after the Czech veteran emerged victorious 6-4 3-6 6-3 in her quarter-final against Russia's Ekaterina Alexandrova.

The neck-and-neck contest saw Kvitova only narrowly edge the total point count 96-91, but she created nine break points to Alexandrova's six.

Kvitova, 33, is now one win away from her 41st WTA singles final, where she would be seeking her 30th WTA title, and her ninth at the WTA 1000 level. It would be her first at this level since the 2018 Madrid Open, following defeats in the finals of the 2019 Dubai Championships, the 2020 Qatar Open and the 2022 Cincinnati Open.

Elena Rybakina is now two wins away from completing the rare 'Sunshine Double' after defeating Martina Trevisan 6-3 6-0 to reach the Miami Open semi-finals on Tuesday.

Only four women have ever claimed the Sunshine Double – which requires winning both the Indian Wells Open and Miami Open. Steffi Graf did it in both 1994 and 1996, Kim Clijsters did it in 2005, Victoria Azarenka accomplished the feat in 2016 and current world number one Iga Swiatek did it just 12 months ago.

Rybakina knocked off Swiatek and world number two Aryna Sabalenka in consecutive matches en route to the Indian Wells title, and she has now extended her winning streak to 12 with Tuesday's victory. Against Trevisan, Rybakina served another 10 aces compared to zero from the Italian.

In her fourth-round match the Kazakhstan representative became the first WTA player this season to post three consecutive matches with at least 10 aces, and with another she became the first woman since Serena Williams at the 2020 US Open to do so in four consecutive matches at the same tournament.

She needed just 27 minutes to race through the second set, and in the process she booked a semi-final against third seed Jessica Pegula.

America's top hope, Pegula had to come from behind against Russia's Anastasia Potapova in the 4-6 6-3 7-6 (7-2) result, saving two match points in the deciding set to force the pivotal tiebreaker.

The match was delayed for hours due to persistent rain, and the contest lasted two hours and 38 minutes, meaning they did not finish up on court until nearly 1:30am local time.

While consistently making it deep into major tournaments, Pegula only has two WTA singles titles to her name, and only once since the end of 2019. 

With one more win she can book her spot in the final, and a chance to claim her second WTA 1000 crown after breaking through at the 2022 Guadalajara Open.

Reigning Wimbledon and Indian Wells Open champion Elena Rybakina extended her winning streak to 11 matches with Monday's 6-4 6-3 victory over Elise Mertens in the Miami Open fourth round.

Rybakina, 23, has been one of the most in-form talents in the sport this year, with her only two losses since the start of the Australian Open coming in three-setters against Aryna Sabalenka and Beatriz Haddad Maia.

The Kazakhstan representative produced 10 aces against Mertens on her way into the quarter-finals, becoming the first player this WTA season to finish with at least 10 aces in three consecutive matches.

She will look to keep her sparkling form alive when she meets Martina Trevisan for a spot in the semi-finals, after the Italian got the better of Latvia's Jelena Ostapenko 6-3 6-3.

Sabalenka showed why she is the top remaining seed after Iga Swiatek's withdrawal, beating 16th seed Barbora Krejcikova 6-3 6-2. Krejcikova was one of two players this season to beat Sabalenka – with Rybakina the other – and by avenging that defeat the Belarusian improved her record in 2023 to 20-2.

America's top hope Jessica Pegula needed only 79 minutes to eliminate Magda Linette 6-1 7-5, winning the first five games of the match to set the tone early, and she will now meet Russia's Anastasia Potapova in the quarters.

Potapova finished with just one ace compared to Qinwen Zheng's nine, but she showed enough guile to overcome the Chinese international's power advantage.

Romania's Sorana Cirstea kept her great run going with a 7-6 (7-3) 6-4 triumph over Marketa Vondrousova, making it eight wins from her past nine matches, and Bianca Andreescu was forced to retire through injury while down a set 7-6 (7-0) 0-2 against Ekaterina Alexandrova.

Last week's Indian Wells Open champion Elena Rybakina has extended her winning streak to 10 matches after defeating Paula Badosa 3-6 7-5 6-3 in Saturday's Miami Open third round.

Kazakhstan's Rybakina, who is also the reigning Wimbledon Champion and Australian Open finalist, got the better of Badosa for the second time during her current run, also eliminating her from Indian Wells. 

The 23-year-old has to be considered one of the favourites to go all the way, having knocked off world number one Iga Swiatek and world number two Aryna Sabalenka to lift the trophy in California.

Rybakina will meet Belgium's Elise Mertens in the fourth round after she beat Croatia's Petra Martic 6-4 6-3.

Meanwhile, the biggest upset of the day was delivered by Russia's Anastasia Potapova, bouncing sixth seed Coco Gauff 6-7 (8-10) 7-5 6-2.

Potapova, who has never won a tournament above the WTA 250 level, will face China's Zheng Qinwen for a spot in the quarter-finals after her three-hour 5-7 7-6 (7-5) 6-3 triumph over Liudmila Samsonova.

Latvia's Jelena Ostapenko, the 24th seed, eliminated Brazilian 13th seed Beatriz Haddad Maia 6-2 4-6 6-3, while 20th seed Magda Linette of Poland knocked out Belarusian 14th seed Victoria Azarenka 7-6 (7-3) 2-6 6-4.

Unseeded American Clare Liu went down 4-6 7-5 6-4 against Italy's Martina Trevisan, but third seed Jessica Pegula will continue to fly the flag for the United States after advancing 6-1 7-6 (7-0) in her all-American showdown with Danielle Collins.

Jessica Pegula and Coco Gauff headlined a great day for the Americans at the Miami Open as they both advanced into the third round on Thursday.

Pegula, who is the second-highest seed remaining in the field after Iga Swiatek's withdrawal, had no issue dispatching Canada's Katherine Sebov 6-3 6-1 in just 66 minutes.

Gauff, the six seed, followed suit as she raced to a 6-4 6-3 win over Canadian Rebecca Marino in just 73 minutes.

Florida's own Danielle Collins thrilled her hometown crowd with a 7-6 (7-3) 6-2 triumph against Bulgaria's Viktoriya Tomova, and rising 22-year-old talent Clare Liu made it a perfect 4-0 sweep for the USA representatives by defeating Julia Grabher 6-4 6-3.

Last week's Indian Wells Open champion Elena Rybakina was made to work in her 7-5 4-6 6-3 win over Anna Kalinskaya, while an even more gruelling effort was required in Paula Badosa's two-hour-and-52-minute 7-6 (7-2) 4-6 6-2 result against Laura Siegemund.

The top seed to fall on Thursday was eighth seed Daria Kasatkina, as she won the first set before going down 4-6 6-2 6-2 against Elise Mertens.

Liudmila Samsonova, the 12th seed, made light work of Viktorija Golubic in a 6-1 6-1 drubbing, and 22nd seed Jelena Ostapenko prevailed 6-3 6-4 against Mirjam Bjorklund.

Ostapenko will next play 13th seed Beatriz Haddad Maia after she won a strange back-and-forth contest 7-6 (7-4) 0-6 6-0 over Tereza Martincova.

Top seed Iga Swiatek will be hard top stop in her title defence at the Indian Wells Open after a straight-sets thrashing over Emma Raducanu in Tuesday's last 16.

The Polish world number one eased to victory 6-3 6-1 in one hour and 25 minutes over the 2021 US Open champion, who has enjoyed an improved run this week in California.

Swiatek offered few weaknesses in a strong disciplined display, converting four of 10 break points, including three in a one-way second set.

The three-time major winner won 88 per cent on her first serve while she was impressive on return and able to win the longer rallies. Swiatek hit 22-9 winners while Raducanu made 22-14 unforced errors.

Swiatek will take on Romania's Sorana Cirstea in the quarter-finals, after she upset fifth seed Caroline Garcia 6-4 4-6 7-5 in two hours and 24 minutes.

Reigning Wimbledon champion Elena Rybakina also progressed in that part of the draw, setting up a last-eight clash with unseeded Czech Karolina Muchova.

Rybakina won 6-3 6-0 over qualifier Varvara Gracheva in a similarly strong performance, needing only one hour and 21 minutes.  Muchova beat compatriot Marketa Vondrousova 6-4 6-7 (2-7) 6-4 in two hours and 37 minutes.

Third seed Jessica Pegula was the major casualty of the day's play, going down 6-2 3-6 7-6 (13-11) to 16th seed Petra Kvitova in a dramatic two-hour-and-16-minutes clash.

Pegula had opened up a 5-3 third-set lead and squandered a match point on serve, before two-time Wimbledon winner Kvitova squared it up at 5-5. Kvitova, however, was broken immediately to offer Pegula another chance to serve out the match again, which she was unable to take.

The American generated another three match points in the tie-break but could not convert before the Czech eventually prevailed on her own fourth match point, with the deciding set lasting one hour and 12 minutes.

Kvitova will face seventh seed Maria Sakkari in the quarters after she triumphed in a lengthy clash 6-4 5-7 6-3 over Karolina Pliskova, lasting two hours and 43 minutes.

Second seed Aryna Sabalenka also needed three sets to beat Barbora Krejcikova 6-3 2-6 6-4 in two hours and four minutes. Krejcikova had been responsible for Sabalenka's lone loss this season, in a 15-1 year.

Sabalenka, who won this year's Australian Open, will face sixth seed Coco Gauff who defeated Rebecca Peterson 6-3 1-6 6-4. Gauff won the last four games for victory, having trailed 4-2 in the deciding set.