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NEW YORK, NEW YORK - AUGUST 26: Coco Vandeweghe of United States returns a shot during her women's singles first round match against Sofia Kenin of United States during day one of the 2019 US Open at the USTA Billie Jean King National Tennis Center on August 26, 2019 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Al Bello/Getty Images)

NEW YORK, NEW YORK - AUGUST 26: Coco Vandeweghe of United States returns a shot during her women's singles first round match against Sofia Kenin of United States during day one of the 2019 US Open at the USTA Billie Jean King National Tennis Center on August 26, 2019 in the Flushing neighborhood of the Queens borough of New York City.  (Photo by Al Bello/Getty Images)