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NEW YORK, NEW YORK - SEPTEMBER 01: Christopher O'Connell of Australia returns a volley during his Men’s Singles first round match against Laslo Djere of Serbia on Day Two of the 2020 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2020 in the Queens borough of New York City. (Photo by Matthew Stockman/Getty Images)

NEW YORK, NEW YORK - SEPTEMBER 01: Christopher O'Connell of Australia returns a volley during his Men’s Singles first round match against Laslo Djere of Serbia on Day Two of the 2020 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2020 in the Queens borough of New York City. (Photo by Matthew Stockman/Getty Images)