Djokovic, Del Potro reach semis at Ind

Djokovic, Del Potro reach semis at Indian Wells
AP - Sports
Angelique Kerber, of Germany, returns a shot to Caroline Wozniacki, of Denmark, during their match at the BNP Paribas Open tennis tournament, Friday, March 15, 2013, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
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