Victoria Azarenka advances, Maria Sharapova ousted at Australian Open

Defending champion Azarenka defeats Sloane Stephens, 6-3, 6-2, in the fourth round of the Australian Open. Third-seeded Sharapova falls, 3-6, 6-4, 6-1, to Dominika Cibulkova.MELBOURNE, Australia — Victoria Azarenka advanced to the quarterfinals and firmed as a favorite to claim a third straight Australian Open title on Monday after Maria Sharapova joined Serena Williams on the fourth-round casualty list.