Serena Williams of the U.S. takes a drink during a break in her third round match against Daniela Hantuchova of Slovakia at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 17, 2014.(AP Photo/Aaron Favila)

Serena Williams of the U.S. takes a drink during a break in her third round match against Daniela Hantuchova of Slovakia at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 17, 2014.(AP Photo/Aaron Favila)