Karolina Pliskova, of the Czech Republic, returns a volley by Li Na, of China, during a third round match at the BNP Paribas Open tennis tournament, Monday, March 10, 2014 in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Karolina Pliskova, of the Czech Republic, returns a volley by Li Na, of China, during a third round match at the BNP Paribas Open tennis tournament, Monday, March 10, 2014 in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Li Na, of China, returns a volley by Karolina Pliskova, of the Czech Republic, during a third round match at the BNP Paribas Open tennis tournament, Monday, March 10, 2014 in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Li Na, of China, returns a volley by Karolina Pliskova, of the Czech Republic, during a third round match at the BNP Paribas Open tennis tournament, Monday, March 10, 2014 in Indian Wells, Calif. (AP Photo/Mark J. Terrill)
Daniela Hantuchova of Slovakia makes a backhand return to Karolina Pliskova of the Czech Republic during their second round match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 15, 2014. (AP Photo/Aijaz Rahi)