Defending champ Agnieszka Radwanska returns a shot against Hsieh Su-Wei as they play the second set of their second round match at the Sony Open Tennis matches at Crandon Park on Key Biscayne, Fl. March 21, 2013. C.W. Griffin / miami herald staff
Defending champ Agnieszka Radwanska returns a shot against Hsieh Su-Wei as they play the second set of their second round match at the Sony Open Tennis matches at Crandon Park on Key Biscayne, Fl. March 21, 2013. C.W. Griffin / Staff Photo
Sloane Stephens prepares to hit a forehand in the second set against Olga Govortsova as they play their second round match at the Sony Open Tennis tournament at Crandon Park on Key Biscayne, Fl. March 21, 2013. C.W. Griffin / Staff Photo
Sloane Stephens prepares to hit a backhand in the third set against Olga Govortsova as they play their second round match at the Sony Open Tennis tournament at Crandon Park on Key Biscayne, Fl. March 21, 2013. C.W. Griffin / Staff Photo
Sloane Stephens prepares to hit a backhand in the first set against Olga Govortsova as they play their second round match at the Sony Open Tennis tournament at Crandon Park on Key Biscayne, Fl. March 21, 2013. C.W. Griffin / Staff Photo
Sloane Stephens prepares to hit a forehand in the second set against Olga Govortsova as they play their second round match at the Sony Open Tennis tournament at Crandon Park on Key Biscayne, Fl. March 21, 2013. C.W. Griffin / Staff Photo
Hsieh Su-Wei misses a shot against defending champ Agnieszka Radwanska as they play the second set of their second round match at the Sony Open Tennis matches at Crandon Park on Key Biscayne, Fl. March 21, 2013. C.W. Griffin / Staff Photo
Sloane Stephens prepares to hit a backhand in the third set against Olga Govortsova as they play their second round match at the Sony Open Tennis tournament at Crandon Park on Key Biscayne, Fl. March 21, 2013. C.W. Griffin / Staff Photo
Sloane Stephens hits a backhand in the third set against Olga Govortsova as they play their second round match at the Sony Open Tennis tournament at Crandon Park on Key Biscayne, Fl. March 21, 2013. C.W. Griffin / Staff Photo
Radwanska C.W. Griffin / Staff Photo
Defending champ Agnieszka Radwanska prepares to return a shot against Hsieh Su-Wei as they play the second set of their second round match at the Sony Open Tennis matches at Crandon Park on Key Biscayne, Fl. March 21, 2013. C.W. Griffin / Staff Photo
Olga Govortsova hits a backhand in the first set against Sloane Stephens as they play their second round match at the Sony Open Tennis tournament at Crandon Park on Key Biscayne, Fl. March 21, 2013. C.W. Griffin / Staff Photo
Olga Govortsova hits a forehand in the second set against Sloane Stephens as they play their second round match at the Sony Open Tennis tournament at Crandon Park on Key Biscayne, Fl. March 21, 2013. C.W. Griffin / Staff Photo
Sloane Stephens hits a forehand in the second set against Olga Govortsova as they play their second round match at the Sony Open Tennis tournament at Crandon Park on Key Biscayne, Fl. March 21, 2013. C.W. Griffin / Staff Photo
Serena Williams hits a forehanded shot in the second set against Flavia Pennetta as they play the second round of the Sony Open Tennis matches at Crandon Park on Key Biscayne, Fl. March 21, 2013. C.W. Griffin / Staff Photo
Serena Williams pumps her fist after she hits a backhanded shotfor a winner in the second set against Flavia Pennetta as they play the second round of the Sony Open Tennis matches at Crandon Park on Key Biscayne, Fl. March 21, 2013. C.W. Griffin / Staff Photo
Serena Williams hits a backhanded shot in the first set against Flavia Pennetta as they play the second round of the Sony Open Tennis matches at Crandon Park on Key Biscayne, Fl. March 21, 2013. C.W. Griffin / Staff Photo
Serena Williams hits a lob shot in the second set against Flavia Pennetta as they play the second round of the Sony Open Tennis matches at Crandon Park on Key Biscayne, Fl. March 21, 2013. C.W. Griffin / Staff Photo
Serena Williams hits a backhanded shot in the second set against Flavia Pennetta as they play the second round of the Sony Open Tennis matches at Crandon Park on Key Biscayne, Fl. March 21, 2013. C.W. Griffin / Staff Photo
Serena Williams dodges a bullet hit at her in the second set by Flavia Pennetta as they play the second round of the Sony Open Tennis matches at Crandon Park on Key Biscayne, Fl. March 21, 2013. C.W. Griffin / Staff Photo