The world Second seed Maria Sharapova storms past Venus Williams at Australian Open . No . 4 Agnieszka Radwanska advances along with Li Na and Angelique Kerber . Defending champion Novak Djokovic into round four after beating Radek Stepanek . Fourth seed David Ferrer and No . 5 Andy Murray both advance to the fourth round.
Second seed Maria Sharapova storms past Venus Williams at Australian Open . No . 4 Agnieszka Radwanska advances along with Li Na and Angelique Kerber . Defending champion Novak Djokovic into round four after beating Radek Stepanek . Fourth seed David Ferrer and No . 5 Andy Murray both advance to the fourth round.