VIENNA (AP) Viktor Troicki advanced to his seventh quarterfinal of the season by defeating third-seeded Dominic Thiem 6-2, 7-5 at the Erste Bank Open on Thursday.
Troicki, from Serbia, held serve throughout against the ninth-ranked Austrian but saved seven break points in the second set.
The 28th-ranked Troicki will next play Spain's David Ferrer, the defending champion, or Portugal's Joao Sousa.
Also, Jo-Wilfried Tsonga came back from 5-3 behind and saved a set point for Germany's Philipp Kohlschreiber in the opening set before beating him 7-6 (6), 6-2. The sixth-seeded Frenchman, who won the event five years ago, improved to 10-1 against Kohlschreiber.
Tsonga next plays Spain's Albert Ramos-Vinolas, who was a break down in the second set but won nine consecutive games to defeat Austria's Jurgen Melzer, 3-6, 6-4, 6-0.