Agnieszka Radwanska of Poland makes a backhand return to Olga Govortsova of Belarus during their second round match at the Australian Open tennis championship in Melbourne, Australia, Thursday, Jan. 16, 2014.(AP Photo/Rick Rycroft)

Agnieszka Radwanska of Poland hits a backhand return to Olga Govortsova of Belarus during their second round match at the Australian Open tennis championship in Melbourne, Australia, Thursday, Jan. 16, 2014.(AP Photo/Rick Rycroft)

Agnieszka Radwanska of Poland hits a return against Olga Govortsova of Belarus during their women's singles second round match on day four of the 2014 Australian Open tennis tournament in Melbourne on January 16, 2014. AFP PHOTO / PAUL CROCK IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE

Agnieszka Radwanska of Poland hits a return against Olga Govortsova of Belarus during their women's singles second round match on day four of the 2014 Australian Open tennis tournament in Melbourne on January 16, 2014. AFP PHOTO / PAUL CROCK IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE

Olga Govortsova of Belarus hits a return against Agnieszka Radwanska of Poland during their women's singles second round match on day four of the 2014 Australian Open tennis tournament in Melbourne on January 16, 2014. AFP PHOTO / PAUL CROCK IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE