Novak Djokovic wins one of the toughest matches of the tournament thus far against Stanislas Wawrinka, 1-6, 7-5, 6-4, 6-7, 12-10. After the 5-hour 5-set thriller, Djokovic will face Tomas Berdych in the quarter finals on Tuesday.
Agnieszka Radwanska won her 13th consecutive match of 2013, when she defeated Ana Ivanovic, 6-2, 6-4.
5th seed Tomas Berdych defeats Kevin Anderson 6-3, 6-2, 7-6(15-13)
Li Na also advances, defeating Julia Goerges 7-6, 6-1.
Nicolas Almagro goes through to face David Ferrer after Janko Tipsarevic retires with a foot injury.
Ekaterina Makarova makes another Australian Open quarterfinal after seeing off 5th seed Angelique Kerber, 7-5, 6-3. She will next play Maria Sharapova.
David Ferrer advances to the quarter finals after a 6-2, 6-4, 6-1 win against Kei Nishikori.
Maria Sharapova defeats Kirsten Flipkens, 6-1, 6-0 to go through to the quarter finals.
6-1, 5-4. This is nerve-wracking.
Wawrinka is up 4-1 in the first set.