Maria Sharapova suffers shock defeat at the Australian Open . The Fourth seed loses in three sets to Slovakia 's Maria Sharapova . Quarterfinals of a grand slam is never easy , no matter who you play . '' World No . 1 Dominika Cibulkova into the quarterfinals after beating Slovakia 's Kei Nishikori . Fourth seed Andy Murray also into the last three with a win over Stephane Robert .
Maria Sharapova suffers shock defeat at the Australian Open . The Fourth seed loses in three sets to Slovakia 's Maria Sharapova . World No . 1 Dominika Cibulkova into the quarterfinals after beating Slovakia 's Kei Nishikori . Fourth seed Andy Murray also into the last three with a win over Stephane Robert .