Florian Mayer Pictures
NEW YORK, NY - SEPTEMBER 01: Florian Mayer of Germany serves during his men's singles third round match against Andy Murray of Great Britain on Day Seven of the 2013 US Open at USTA Billie Jean King National Tennis Center on September 1, 2013 in the Flushing neighborhood of the Queens borough of New York City. (Photo by Clive Brunskill/Getty Images)