Maria Sharapova of Russia takes a drink during a practice session ahead of the Australian Open tennis championship in Melbourne Australia, Sunday, Jan. 12, 2014. (AP Photo/Aaron Favila)
Maria Sharapova of Russia prepares to make a backhand return during a practice session ahead of the Australian Open tennis championship in Melbourne Australia, Sunday, Jan. 12, 2014. (AP Photo/Aaron Favila)
Serena Williams of the United States speaks during a press conference ahead of the Australian Open tennis championship in Melbourne, Australia, Saturday, Jan. 11, 2014. (AP Photo/Aaron Favila)