Stanislas Wawrinka, of Switzerland, returns a shot to Andy Murray, of Great Britain, during the quarterfinals of the 2013 U.S. Open tennis tournament,
Stanislas Wawrinka, of Switzerland, returns a shot to Andy Murray, of Great Britain, during the quarterfinals of the 2013 U.S. Open tennis tournament, Thursday, Sept. 5, 2013, in New York. (AP Photo/David Goldman) (David Goldman/AP)