It looked like the 31-year-old tennis player was surprised by the superiority of Coco Gauff and some changes in her game.

Subscribe to The Athletic on an exclusive offer here. Dimitrov can be a rather maddening opponent. A big strong guy who can play like a 140-pound hacker and slice you to pieces. It's unclear what ...

Subscribe to The Athletic on an exclusive offer here. In their most recent meeting at Wimbledon, Dimitrov used his backhand slice to unsettle Tiafoe on the forehand side. He hasn't managed to do that ...

These shots aren’t used every point but they’re game-changers when timed right. Lob: High, arcing shot that forces opponents to retreat. Drop shot: Soft, short shot that lands ...