Flavia Pennetta, of Italy, eturns a shot to Li Na, of China, at the BNP Paribas Open tennis tournament, Friday, March 14, 2014, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Li Na, of China, returns a shot to Flavia Pennetta, of Italy, at the BNP Paribas Open tennis tournament, Friday, March 14, 2014, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Dominika Cibulkova, of Slovakia, reaches for a hit from Li Na, of China, during a quarterfinal match at the BNP Paribas Open tennis tournament, Thursday, March 13, 2014 in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Li Na, of China, hits a return to Dominika Cibulkova, of Slovakia, during a quarterfinal match at the BNP Paribas Open tennis tournament, Thursday, March 13, 2014 in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Dominika Cibulkova, of Slovakia, returns a shot to Li Na, of China, during a quarterfinal match at the BNP Paribas Open tennis tournament, Thursday, March 13, 2014 in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Li Na, of China, hits to Dominika Cibulkova, of Slovakia, during a quarterfinal match at the BNP Paribas Open tennis tournament, Thursday, March 13, 2014 in Indian Wells, Calif. (AP Photo/Mark J. Terrill)