Coco Gauff was as aware as anyone, of course, that her tour-worst double-fault total is a significant problem, so she fired one of her coaches on the eve of the U.S. Open and brought aboard the serve doctor who helped No.

The tentacles of Hurricane Erin reached New York Wednesday, forcing the closure of beaches and the cancellation of the qualifying matches at the U.S. Open. It was eerily quiet at the USTA Center -— the sky was gray,

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."