Maria Sharapova suffers shock loss at the Australian Open . The third seed loses in three sets to Slovakia 's Dominika Cibulkova . World No . 1 Rafael goes into the quarterfinals after beating Japan 's . Nishikori . Fourth seed Andy Murray also into the last eight with a win over Todd Robert .
Maria Sharapova suffers shock defeat at the Australian Open . The third seed loses in three sets to Slovakia 's Dominika Cibulkova . World No . 1 Rafael Nadal into the quarterfinals after beating Japan 's Kei Nishikori . Fourth seed Andy Murray also into the last eight with a win over Stephane Robert .