Kaia Kanepi Pictures
NEW YORK, NY - SEPTEMBER 01: (L-R) Serena Williams of the United States shakes hands with Kaia Kanepi of Estonia after their women's singles fourth round match on Day Eight of the 2014 US Open at the USTA Billie Jean King National Tennis Center on September 1, 2014 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Elsa/Getty Images)