Djokovic will now face French qualifier Arnaud Clement, a 5-7 6-3 7-6 winner over German 16th seed Tommy Haas, with Del Potro to play Chilean 10th seed Fernando Gonzalez after he beat American John Isner 7-5 7-6.
Padres prospect Casey Kelly, a key piece in the trade that sent Adrian Gonzalez to Boston in December 2010, had Tommy John surgery Tuesday on his right elbow.
Padres pitching prospect Casey Kelly, a key piece in the trade that sent Adrian Gonzalez to Boston in December 2010, is scheduled for Tommy John surgery Tuesday on his right elbow.