Serena Williams of the U.S. celebrates after defeating Daniela Hantuchova of Slovakia in their third round match at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 17, 2014.(AP Photo/Aaron Favila)

APTOPIX Australian Open Tennis

Serena Williams of the U.S. celebrates after defeating Daniela Hantuchova of Slovakia in their third round match at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 17, 2014.(AP Photo/Aaron Favila)

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