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NEW YORK, NY - SEPTEMBER 01: Anastasia Pavlyuchenkova of Russia returns a shot to Kristina Mladenovic of France during her second round Women's Singles match on Day Four of the 2016 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2016 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Mike Hewitt/Getty Images)

NEW YORK, NY - SEPTEMBER 01:  Anastasia Pavlyuchenkova of Russia returns a shot to Kristina Mladenovic of France during her second round Women's Singles match on Day Four of the 2016 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2016 in the Flushing neighborhood of the Queens borough of New York City.  (Photo by Mike Hewitt/Getty Images)