At US Open, complaints about the ball before 1st one struck

Large tennis balls are displayed on the grounds of the U.S. Open tennis tournament in New York, Thursday, Aug. 25, 2022. The U.S. Open, the year’s last Grand Slam tennis tournament, starts Monday. (AP Photo/Seth Wenig)

Coco Gauff returns a shot during a practice session for the US Open tennis championships, Friday, in New York. (AP Photo/Julie Jacobson)

NEW YORK — Coco Gauff’s father sometimes will tweak her racket, and the 18-year-old American never notices.