There were enough tennis stars inside the Metropolitan Museum of Art at Monday's Met Gala, it seemed, to play a tournament.

Spanish teenager Carlos Alcaraz has beaten No. 3 seed Stefanos Tsitsipas in five sets at the U.S. Open to reach the fourth round of a major for the first time.

Defending champion Naomi Osaka repeatedly smashed her racket to the court, smacked a ball into the crowd, hid under a towel and imploded over the final two sets in a thir...