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.

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.

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.

The top seed in action on Tuesday at the Guadalajara Open made it through her opening match unscathed as Maria Sakkari defeated Marta Kostyuk 6-4 6-4.

Sakkari is one of the players needing a strong result in the tournament to break into the top-eight of the world rankings to qualify for the upcoming WTA Finals, entering the week at 10th, but only needing to make up one spot, with number eight Simona Halep out due to injury.

With her victory over Kostyuk, Sakkari avoided notching four consecutive losses for the first time this season, and will likely only need one more win to move into WTA Finals contention.

Her next opponent appears to be world number 16 Danielle Collins, who had no issue dispatching American compatriot Caroline Dolehide 6-4 6-1 to book her second-round fixture against Magdalena Frech after the Polish qualifier beat Yulia Putintseva 6-3 6-4.

World number seven Daria Kasatkina also should be locked into the WTA Finals after cruising past China's Lin Zhu 6-1 6-2, while 18th-ranked Beatriz Haddad Maia's season is over after a disappointing 7-5 6-2 upset loss to Katerina Siniakova.

Petra Kvitova needed to reach the final to have a chance of qualifying, but after a strong first set she fell 3-6 6-2 6-0 against Canada's Bianca Andreescu. In a good day for the Canadians, Eugenie Bouchard also beat Kayla Day 7-5 6-3 as the former world number five fights her way back up the rankings after a long injury layoff.

Italy's Elisabetta Cocciaretto defeated Russia's Anastasia Potapova 6-2 6-1, while Latvia's top talent Jelena Ostapenko cruised past America's Lauren Davis 6-1 6-3.

Madison Keys was too strong for Magda Linette in a 6-3 6-3 triumph, and in an all-Czech matchup, Marie Bouzkova downed Tereza Martincova 6-2 7-5.

Croatia's Donna Vekic eliminated Brazil's Laura Pigossi 6-4 6-1, and Italy's Martina Trevisan showed why she is top-30 in the world with a convincing 6-4 6-3 straight sets win against Japan's Nao Hibino.

In the last match of the night, world number 10 Caroline Garcia survived an early scared to come from behind and defeat Rebecca Marino 6-7 (2-7) 6-3 7-6 (7-5).

Anhelina Kalinina progressed to round two of the Transylvania Open after opponent Eugenie Bouchard retired injured in Cluj.

Ukrainian world number 45 Kalinina took the opening set 6-3 before a hip injury prevented Bouchard from continuing.

The Canadian revealed she had retired as a precaution having undergone an MRI on Monday, and did not wish to aggravate the issue any further.

"I'm just disappointed to have ended my tournament in Romania this way because I really loved being here in Cluj," she said. "I pulled my hip flexor a few days in practice. I tried everything to be ready for this match.

"I got an MRI yesterday, and didn't show anything too bad, so I thought I could play. But it was getting worse as the match went on. To avoid a big injury, I figured it would be best to retire.

"I absolutely hate retiring, I wish I could've done better here, but I hope to be back."

Fourth seed Anastasia Potapova beat Ann Li 6-2 7-6 (7-5) to set up a clash with Viktorija Golubic, who overcame Diane Parry in straight sets.

Seventh seed Xiyu Wang advanced in straight sets against home favourite Jaqueline Cristian, while Harriet Dart required just 64 minutes to wrap up a commanding 6-2 6-0 victory over Oceane Dodin.

Naomi Osaka began the defence of her Pan Pacific Open crown with a quick win after opponent Daria Saville was forced to retire in just the second game.

Four-time grand slam champion Osaka won the opening game, before Saville was unable to continue due to a scary-looking injury to her left knee.

The former world number one will now face a second round match with world number 16 Beatriz Haddad Maia, who eased to a straight sets victory over Yuki Naito.

Karolina Pliskova secured her place in the next round in Tokyo with a 6-2 6-1 demolition of Isabella Shinikova, while Zhang Shuai will face second seed Caroline Garcia on Wednesday after overcoming Mai Hontama in two sets.

In Seoul, Jelena Ostapenko's hopes of repeating her 2017 heroics at the Korea Open are still alive after the number one seed narrowly beat 19-year-old Jeong Bo-young.

The world number 19 looked to be cruising after the opening set, but the unheralded South Korean hit back in the second and took it to a tie-break in the third, before Ostapenko's class showed as she won the crucial tie-break 7-2.

Elsewhere, 2021's beaten finalist Kristina Mladenovic saw off wildcard Park So-hyun 6-4 4-6 6-3, while second seed Ekaterina Alexandrova overcame a worrying second set to beat Asia Muhammad 6-1 3-6 6-1.

Wimbledon semi-finalist Tatjana Maria is also safely through to the second round after a tight 7-6 (7-5) 7-6 (7-5) triumph over Eugenie Bouchard.

Naomi Osaka pulled out of Wimbledon on Saturday as tournament officials said the former world number one was suffering with a leg injury.

The announcement came in the wake of Osaka revealing she was considering skipping the grand slam in any case, as she suspected it may feel "like an exhibition".

The All England Club's decision to ban Russian and Belarusian players from competing has resulted in the WTA and ATP stripping Wimbledon of all ranking points.

Osaka, who is a four-time grand slam champion, suggested after her first-round exit at the French Open that she was unsure about whether to commit to the grass-court major.

Confirmation of her absence from the event, which starts on June 27, came from Wimbledon as her name was added to a list of withdrawals.

The Japanese 24-year-old has only played Wimbledon's main draw three times in her career, twice reaching the third round. She has yet to go further but has won the Australian Open twice and the US Open on two occasions. Recently she complained of a "stubborn" Achilles problem.

Osaka was joined on the withdrawal list by Eugenie Bouchard, the 28-year-old Canadian who was runner-up to Petra Kvitova at the 2014 Wimbledon championships.

Wimbledon listed Bouchard as absent due to a shoulder problem; however, that told only part of the story.

She is battling her way back up the rankings after injury and disappointing results and said she could not risk using a special entry dispensation on a tournament that will carry no points.

Bouchard wrote on Instagram: "I have decided to withdraw from Wimbledon due to the WTA's decision to not award ranking points at this year's championships.

"Due to my shoulder surgery, I get a limited number of protected ranking [PR] entries. As much as I love Wimbledon and skipping it makes me sad, using a PR entry at a tournament with no ranking points doesn't make sense. I must choose wisely and use my PR at tournaments that will help me get back to where I want to be."

She said she would use her protected ranking grand slam entries for the next US Open and Australian Open.

Iga Swiatek continued her outstanding form as she cruised into the French Open semi-finals with a 6-3 6-2 win over Jessica Pegula, joining an elite list of young players to have reached the final four in the year's first two grand slams.

In racking up her 33rd consecutive win, the world number one ensured she followed up her semi-final appearance at this year's Australian Open with another deep run at Roland Garros.

On the day after her 21st birthday, 2020 French Open champion Swiatek joined a select group of players in managing that feat, with only six women making back-to-back semi-finals at the tournaments at a younger age than the Pole since the turn of the century.

They are Martina Hingis, Justine Henin, Kim Clijsters, Ana Ivanovic, Eugenie Bouchard and Maria Sharapova.

Having become just the fourth woman this century to win five consecutive tournaments on the WTA Tour coming into Roland Garros, Swiatek will go into her semi-final clash against Daria Kasatkina confident of taking another step towards a second grand slam title.

Former US Open champion Sloane Stephens has continued her torrid start to 2021 after crashing out in the first round of the Monterrey Open on Tuesday.

Stephens went into the Mexico event as top seed but lost to Slovakian world number 151 Kristina Kucova 6-2 6-2.

The 27-year-old American is now 0-4 to start the 2021 WTA Tour season and has won only one set all season.

Stephens, now ranked 48th in the world, only managed to win 32.4 per cent of points on her first serve, with Kucova converting seven of 14 break points in the match.

Second seed Nadia Podoroska was also a first-round casualty on Tuesday, going down 6-4 6-4 to Russian qualifier Anna Kalinskaya.

In the late match, Eugenie Bouchard went down to China's Lin Zhu 7-5 7-6 (6-3).

Madison Keys is intent on giving Maria Sakkari a second-round test after marking her first WTA Tour appearance since September with a clinical win at the Qatar Open.

American world number 19 Keys, who reached the US Open final in 2017, had not played on tour since losing to Zhang Shuai in the first round of the French Open in late September – she was ruled out of the Australian swing of this season after a positive coronavirus test.

But Keys roared back to action with a thumping 6-4 6-1 victory over Belinda Bencic on Tuesday, the Swiss who last week reached the Adelaide International final.

"I'm really happy with how I came out and played today," Keys said. "I'm a little bit surprised with myself but hoping to keep the momentum going."

Sakkari promises to pose a tricky test for Keys, who is unseeded this week, given the Greek player dropped only three games in her opening win over Mayar Sherif and has shown bright early-season form.

World number 23 Elena Rybakina tripped up in the first round after the Moscow-born Kazakh player lost 7-6 (9-7) 7-6 (7-5) to Germany's 56th-ranked Laura Siegemund at the WTA Premier event.

Jessie Pegula, Anastasia Pavlyuchenkova, Ons Jabeur and Misaki Doi also scored straight-sets victories in Doha.

At the Lyon Open, French players Caroline Garcia and Kristina Mladenovic were both pushed to three sets before inking their places in the last 16.

Third seed Garcia edged compatriot Oceane Dodin 6-2 2-6 6-3, while fourth seed Mladenovic scrambled for a 5-7 7-5 6-2 win over Romanian Mihaela Buzarnescu.

Former Wimbledon runner-up Eugenie Bouchard, in on a wildcard, was bounced out 7-6 (9-7) 6-2 by Aliaksandra Sasnovich, the world number 96 from Belarus.