NEW YORK, NEW YORK - AUGUST 31: Jack Sock of the United States returns the ball against Yoshihito Nishioka of Japan during his Men's Singles first round match on Day Two of the 2021 US Open at the Billie Jean King National Tennis Center on August 31, 2021 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Elsa/Getty Images)
