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Jack Sock hits a forehand at the US Open

Jack Sock of the USA hits a forehand to Yoshihito Nishioka of Japan in the second set of their first round match held on Court 13 at the 2021 US Open Tennis Championships at the USTA Billie Jean King National Tennis Center in New York City on Tuesday, August 31, 2021. Photo by Monika Graff/UPI

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