Flavia Pennetta of Italy walks off the Rod Laver Arena after her loss 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)

Australian Open Tennis

Flavia Pennetta of Italy walks off the Rod Laver Arena after her loss 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)

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