Gauff said, "I'm obsessed with the process of getting better. ...I feel like I have a clear future where I see myself and I feel like I'm really close."

Coco Gauff has has fired one of her coaches on the eve of the U.S. Open and brought aboard the serve doctor who helped No. 1-ranked Aryna Sabalenka work on her issues with that part of the game.

Coco Gauff says she "did not want to waste time" continuing with something that evidently wasn't working anymore and that's why she decided to abruptly fire coach Matt Daly and add biomechanics expert Gavin MacMillan to her team.