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NEW YORK, NY - SEPTEMBER 02: Catherine Bellis of the United States returns a shot to Natalia Vikhlyantseva of Russia during their junior girls' singles second round match on Day Nine of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 2, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Elsa/Getty Images)

NEW YORK, NY - SEPTEMBER 02:  Catherine Bellis of the United States returns a shot to Natalia Vikhlyantseva of Russia during their junior girls' singles second round match on Day Nine of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 2, 2014 in the Flushing neighborhood of the Queens borough of New York City.  (Photo by Elsa/Getty Images)