Two-time major champion Garbiñe Muguruza has announced her retirement from professional tennis at age 30.

Much like for so many other folks, Serena Williams’ last match at the U.S. Open was must-see TV for players still in the tournament, so Jessica Pegula and Petra Kvitova tuned in from their hotel rooms the night before their victories led off Saturday’s schedule and set up a fourth-round showdown.

Serena and Venus Williams do not appear on the women’s singles entry list released by Wimbledon.

Nick Kyrgios says his recent bout of COVID-19 “hit me pretty hard.”.

At least Novak Djokovic knows who he'll face in the first round of his Australian Open title defense — if he’s allowed to play.

United States' Serena Williams falls during her fourth round match against Aryna Sabalenka of Belarus at the Australian Open tennis championship in Melbourne, Australia, Sunday, Feb. 14, 2021. (AP Photo/Hamish Blair)MELBOURNE – Serena Williams tumbled to the ground, her heavily taped right ankle turning, her body contorting, her racket flying. Grabbing the last two games, Williams pulled out 6-4, 2-6, 6-4 victory over No. Oh, my goodness.”Sabalenka — a 22-year-old from Belarus playing in only her second fourth-round Slam match — was visibly and audibly frustrated. Dominic Thiem — the Australian Open runner-up and U.S. Open champion in 2020 — looked physically compromised in a 6-4, 6-4, 6-0 loss to three-time major semifinalist Grigor Dimitrov.

AdHe said: “If it’s any other tournament than a Grand Slam, then I’d withdraw from that event, that’s for sure. Defending champion Novak Djokovic has started his fourth-round match against Milos Raonic at the Australian Open. He'll play either U.S. Open champion Dominic Thiem or Grigor Dimitrov next and he says he doesn't have a preference. Their match is to be followed by eight-time Australian Open champion Djokovic against 2016 Wimbledon finalist Milos Raonic — assuming Djokovic decides he can play. Other men in action include reigning U.S. Open champion Dominic Thiem and the man he beat in that final, Alexander Zverev.

Spain's Rafael Nadal reacts during his first round match against Serbia's Laslo Djere at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Feb. 9, 2021. Daniil Medvedev extended his winning streak to 15 matches with a 6-2, 6-2, 6-4 win over Vasek Pospisil and seventh-seeded Andrey Rublev beat Yannick Hanfmann 6-3, 6-3, 6-4. 9 Matteo Berrettini defeated Kevin Anderson, a two-time finalist at majors, 7-6 (9), 7-5, 6-3. Barty lost to Sofia Kenin in the Australian Open semifinals last year and then skipped the U.S. Open and her title defense at the French Open because she stayed in Australia during the COVID-19 pandemic. AdTwo-time Australian Open quarterfinalist Tennys Sandgren also went through the hard lockdown.

United States' Serena Williams makes a forehand return to compatriot Danielle Collins during a tuneup event ahead of the Australian Open tennis championships in Melbourne, Australia, Friday, Feb. 5, 2021. 3 Naomi Osaka, the U.S. Open champion. Two-time Australian Open champion Victoria Azarenka, Johanna Konta and Elina Svitolina are also in Kenin's quarter. Williams already has won seven Australian Open titles and her 23 major titles is a record in the Open era. In the top half, Djokovic’s bid for a third consecutive Australian title — and ninth overall — could get tricky.

United States' Serena Williams makes a forehand return to compatriot Danielle Collins during a tuneup event ahead of the Australian Open tennis championships in Melbourne, Australia, Friday, Feb. 5, 2021. (AP Photo/Andy Brownbill)MELBOURNE – Serena Williams withdrew from an Australian Open tuneup tournament citing a right shoulder injury on Friday within hours of setting up a semifinal match against top-ranked Ash Barty. Garbine Muguruza beat defending Australian Open champion Sofia Kenin 6-2, 6-2 to advance to the semifinals, reversing their result of their 2020 final at Melbourne Park. AdOn either side of a delay on outside courts because of rain, former Wimbledon, U.S. Open and Australian champion Angelique Kerber beat No. 8 Ons Jabeur 6-4, 6-4 and Belinda Bencic, the highest-ranked player in the tournament, lost to Sorana Cirstea 7-5, 6-2.

Serbia's Novak Djokovic celebrates after defeating Canada's Denis Shapovalov in their ATP Cup match in Melbourne, Australia, Tuesday, Feb. 2, 2021. (AP Photo/Hamish Blair)MELBOURNE – Rafael Nadal didn't make it for Spain's ATP Cup opener because of a sore back, deciding it wasn't worth the risk a week ahead of the Australian Open. Nadal played more of a hand in that, with Djokovic limiting his time on court because of a blister. Back at Melbourne Park, where he has won a record eight Australian Open titles, he had plenty of energy to consume. Osaka, who won the U.S. Open last year and the Australian Open in 2019, will next face No.

But he had been 0-4 in the third round at the French Open until now. ___4:20 p.m.Fifth-seeded Stefanos Tsitsipas reached the fourth round at the French Open for the second year in a row. The 22-year-old has now upset seventh-seeded Matteo Berrettini to storm into the fourth round with a 6-2, 7-6 (5), 6-4 win. That many men haven’t gone that far on their debuts at Roland Garros since four debutants made the last 16 in 1994. ___1:10 p.m.Andrey Rublev advanced to the French Open fourth round with a 6-3, 6-2, 6-3 win against the unseeded South African Kevin Anderson.

Shapovalov committed 106 unforced errors in the match compared to 42 for Carballes Baena and twice served for the match. The Canadian also had more winners than Carballes Baena with 65 to the unseeded Spaniard's 31. Carballes Baena sank to his knees after Shapovalov hit a forehand long and let out a loud shout of delight. Carballes Baena will next play 18th-seeded Grigor Dimitrov. Pliskova's twin sister, Kristyna, was also playing a former French Open champion when she faced 2016 winner Garbiñe Muguruza.