Li Na of China, left, shakes hands with Flavia Pennetta of Italy at the net, after Li won their quarterfinal at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 21, 2014.(AP Photo/Andrew Brownbill)
Li Na of China celebrates after defeating Flavia Pennetta of Italy during their quarterfinal at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 21, 2014. (AP Photo/Aaron Favila)
Flavia Pennetta of Italy makes a backhand return to Li Na of China during their quarterfinal at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 21, 2014.(AP Photo/Aaron Favila)