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NEW YORK, NY - AUGUST 31: Denis Shapovalov of Canada returns the ball during his men's singles third round match against Kevin Anderson of South Africa on Day Five of the 2018 US Open at the USTA Billie Jean King National Tennis Center on August 31, 2018 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Elsa/Getty Images)

NEW YORK, NY - AUGUST 31:  Denis Shapovalov of Canada returns the ball during his men's singles third round match against Kevin Anderson of South Africa on Day Five of the 2018 US Open at the USTA Billie Jean King National Tennis Center on August 31, 2018 in the Flushing neighborhood of the Queens borough of New York City.  (Photo by Elsa/Getty Images)