The semifinal match between Coco Gauff and Karolina Muchova was delayed by 50 minutes because of a disruption by environmental activists, one who glued his bare feet to the concrete floor.

Dozens of athletes competing in the U.S. Open in New York City are suffering through muggy temperatures that are cracking the 90s.

Electronic line judging has replaced humans at the U.S. Open. But the voices making calls are real people, recorded with varying levels of urgency to sell the call, depending on how close the shot is.

Carlos Alcaraz and Frances Tiafoe engaged in a high-level, high-energy spectacle of a back-and-forth semifinal — no point over when it seemed to be, no ball out of reach, no angle too audacious.

Frances Tiafoe topped Russia's Andrey Rublev 7-6 (3), 7-6 (0), 6-4 behind the backing of a boisterous partisan crowd in Arthur Ashe Stadium on Wednesday.

The 23-time Grand Slam champion staved off five match points to prolong the three-hours-plus proceedings, but could not do more, and was eliminated from the U.S. Open in the third round.

Capacity crowds have turned out to watch American tennis star Serena Williams play in the first two rounds of the U.S. Open. She's said this might be her last tournament. No one wants to say goodbye.

At least one viewer watching at home thought they spotted Beyoncé in the star-studded stands at Serena Williams' U.S. Open match Monday night. Cox, who "worships" the singer, took it in stride.

The transcendent star of women's tennis delays her farewell after defeating Danka Kovinic Monday night in her opening match of the U.S. Open.

At only 18 years old, she's the youngest player to win a Grand Slam singles tournament since 2004. She's also the first female British player to win a Grand Slam event in 44 years.

The Canadian tennis phenom is taking this year's U.S. Open by storm, becoming the youngest woman to reach the semifinals in 16 years.

In a tearful post-match news conference, the tennis superstar says the sport no longer makes her happy. "I honestly don't know when I'm going to play my next tennis match," she says.

Tennis players are navigating the eerie stillness of a Grand Slam event known for its lively crowds. Last year's U.S. Open set an attendance record, drawing more than 737,800 fans over two weeks.

The tennis star had hoped to win his 20th Grand Slam at this year's meet, which would have tied him for most men's wins in that category.

Djokovic, the world's No. 1-ranked men's tennis player, has previously voiced concerns about the possibility of restrictions at future tennis events due to the coronavirus.