Maria Sharapova of Russia challenges a line call during her first round match against Bethanie Mattek-Sands of the U.S.  at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 14, 2014.(AP Photo/Aaron Favila)

Australian Open Tennis

Maria Sharapova of Russia challenges a line call during her first round match against Bethanie Mattek-Sands of the U.S. at the Australian Open tennis championship in Melbourne, Australia, Tuesday, Jan. 14, 2014.(AP Photo/Aaron Favila)

Top Ranked Players
More Rankings