Maria Sharapova of Russia reacts after losing a point to Dominika Cibulkova of Slovakia during their fourth round match at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 20, 2014.(AP Photo/Eugene Hoshiko)
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)
Maria Sharapova of Russia follows through on a shot to Dominika Cibulkova of Slovakia during their fourth round match at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 20, 2014.(AP Photo/Eugene Hoshiko)
Maria Sharapova of Russia celebrates a point won against Dominika Cibulkova of Slovakia during their fourth round match at the Australian Open tennis championship in Melbourne, Australia, Monday, Jan. 20, 2014.(AP Photo/Aaron Favila)