Flavia Pennetta of Italy serves to Li Na of China  during their quarterfinal at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 21, 2014.(AP Photo/Eugene Hoshiko)

Australian Open Tennis

Flavia Pennetta of Italy serves to Li Na of China during their quarterfinal at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 21, 2014.(AP Photo/Eugene Hoshiko)

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