Stephane Robert of France celebrates his win over Martin Klizan of Slovakia during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Jan. 18, 2014.(AP Photo/Aijaz Rahi)
Stephane Robert of France celebrates his win over Martin Klizan of Slovakia during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Jan. 18, 2014.(AP Photo/Aijaz Rahi)
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)
Dominika Cibulkova of Slovakia celebrates a point won against Maria Sharapova of Russia during their fourth round match at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 20, 2014.(AP Photo/Aaron Favila)