Marcos Baghdatis of Cyprus upset fourth-seeded Bernard Tomic of Australia 7-6 (7), 6-3 Wednesday to advance to the Stockholm Open quarterfinals.
Baghdatis, who won the tournament in 2009, said he had used his "brain a lot" against Tomic.
"You need to be smart on court and not hurry too much," Baghdatis said. "I think I did it very well."
Baghdatis next plays eighth-seeded Gilles Muller of Luxembourg, who defeated John Millman of Australia 7-5, 6-3.
The 32-year-old Muller fired 14 aces in the 76-minute victory.
This content appears as provided to The Globe by the originating wire service. It has not been edited by Globe staff.