Stanislas Wawrinka of Switzerland returns a shot against Roger Federer of Switzerland during their match at the BNP Paribas Open tennis tournament, Wednesday, March 13, 2013, in Indian Wells, Calif. ...
more Stanislas Wawrinka of Switzerland returns a shot against Roger Federer of Switzerland during their match at the BNP Paribas Open tennis tournament, Wednesday, March 13, 2013, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
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