Image:Top seed Novak Djokovic survived a huge scare before beating Stanislas Wawrinka 12-10 in the final set.
Image:Maria Sharapova continued her blistering form by brushing aside Kirsten Flipkens in 68 minutes.
Image:Ekaterina Makarova's love affair with Melbourne continued as she made it through to the quarter-finals with victory over fifth seed Angelique Kerber.
Image:Li a overcame some nervy moments before seeing off Julia Goerges 7-6 (8/6) 6-1.
Image:Agnieszka Radwanska maintained her remarkable form in 2013 with a 6-2 6-4 win over Ana Ivanovic.
Image:David Ferrer cruised into his third successive Australian Open quarter-final as he eased past Kei Nishikori.
Image:Tomas Berdych is still to drop a set as he eased past Kevin Anderson.
Image:Janko Tipsarevic was struggling with a foot injury ...
Image:He lost the first set 6-2 to Nicolas Almagro and was 5-1 down in the second when he opted to retire.
Image:Stanislas Wawrinka cruised through the first set against World No 1 Novak Djokovic.
Image:Things were not going Djokovic's way and an upset looked on the cards.
Image:But the Serbian rallied to lead 2-1 - only for Wawrinka to force a deciding set.
Image:The fifth set was an epic with Djokovic eventually winning it 12-10.
