Serena Williams (L) of the US and Vitalia Diatchenko of Russia meet at the net after Diatchenko withdrew during their Womens Singles Round 1 match at the 2015 US Open at USTA Billie Jean King National Tennis Center in New York on August 31, 2015. AFP PHOTO/DON EMMERT (Photo credit should read DON EMMERT/AFP via Getty Images)
