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Anastasia Pavlyuchenkova of Russia serves to Kristina Mladenovic of France during their US Open 2016 women's single match at the USTA Billie Jean King National Tennis Center in New York on September 1, 2016. / AFP / TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)

Anastasia Pavlyuchenkova of Russia serves to Kristina Mladenovic of France during their US Open 2016 women's single match at the USTA Billie Jean King National Tennis Center in New York on September 1, 2016. / AFP / TIMOTHY A. CLARY        (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)