NEW YORK, NY - AUGUST 31: Coco Vandeweghe of the United States reacts after defeating Sloane Stephens of the United States in their Women's Singles First Round match on Day One of the 2015 US Open at the USTA Billie Jean King National Tennis Center on August 31, 2015 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Streeter Lecka/Getty Images)
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