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

Australian Open Tennis

Serena Williams of the U.S. serves to Daniela Hantuchova of Slovakia during 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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