Marcos Baghdatis beat Russia's Marat Safin 6-4, 6-4, 2-6, 3-6, 6-2 in the second round of the Australian Open.
The Russian beat American wildcard Scott Oudsema 6-4, 7-6 to reach the second round on Tuesday.
The world number one eased past Russia's Marat Safin at the Kooyong Classic invitational event on Thursday.