SHUAI ZHANG

Wimbledon is relaxing its requirement for all-white clothing to allow female players to wear colored undershorts to be more comfortable on their periods.

Coco Gauff has reached the U.S. Open quarterfinals for the first time by coming back in each set to beat Zhang Shuai of China 7-5, 7-5 in front of a partisan crowd at Arthur Ashe Stadium.

Nick Kyrgios has eliminated defending U.S. Open champion and No. 1-ranked Daniil Medvedev in the fourth round.

MASON, Ohio — (AP) — Four-time Grand Slam champion Naomi Osaka was eliminated by Shuai Zhang, 6-4, 7-5, in the first round of the Western & Southern Open on Tuesday. The tournament outside Cincinnati lost another big name, Coco Gauff, when she retired from her match against qualifier Marie Bouzkova with a left ankle injury. Belinda Bencic, who beat Serena Williams last week in Canada, fell to Sorana Cirstea, 6-2, 6-7 (3), 6-4. The 22-time Grand Slam champion is scheduled to play a second-round match on Wednesday. In a men’s first-round match, Wimbledon finalist Nick Kyrgios beat Alejandro Davidovich Fokina 7-5, 6-4.

Serena Williams has fallen to 0-2 in matches since announcing “the countdown has begun” on her career.

Four-time Grand Slam champion Naomi Osaka was eliminated by Shuai Zhang, 6-4, 7-5, in the first round of the Western & Southern Open on Tuesday. The tournament outside Cincinnati lost another big name, Coco Gauff, when she retired from her match against qualifier Marie Bouzkova with a left ankle injury. Gauff had her ankle taped after the first set and dropped out after the first game of the second set.

Mertens won the women's doubles title at Wimbledon last year with Hsieh Su-wei and has three Grand Slam titles. It is Djokovic’s 21st Grand Slam title overall, putting him one behind record-holder Rafael Nadal. The third-seeded Poljicak came from a break down in both sets to win his first junior Grand Slam title. Djokovic is looking for a seventh Wimbledon title and 21st Grand Slam title overall. Djokovic is looking for a seventh Wimbledon title and 21st Grand Slam title overall.

Serena Williams has lost her first singles match in nearly a year.