Roger Federer of Switzerland returns a shot against Stanislas Wawrinka of Switzerland during their match at the BNP Paribas Open tennis tournament, Wednesday, March 13, 2013, in Indian Wells, Calif. ...
more Roger Federer of Switzerland returns a shot against Stanislas Wawrinka 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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