Roger Federer, of Switzerland, wipes sweat from his brow during a first round match against Grega Zemlja, of Slovenia, at the 2013 U.S. Open tennis tournament Tuesday, Aug. 27, 2013, in New York. (AP ... more 
Roger Federer, of Switzerland, wipes sweat from his brow during a first round match against Grega Zemlja, of Slovenia, at the 2013 U.S. Open tennis tournament Tuesday, Aug. 27, 2013, in New York. (AP Photo/Mike Groll) less 
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Associated Press | Photo By Mike Groll
Tue, Aug 27, 2013 6:13 PM EDT