In Friday's quarterfinals, the tournament's third seed was beaten by No. 11 seed Arnaud Clement of France, 7-6 (7-1), 6-4.
Eighth-seeded Andy Murray of England beat No. 16 Mardy Fish of the United States, 6-2, 6-4. In a battle of non-seeds, Russia's Marat Safin beat Wesley Moodie of South Africa, 7-6 (7-5) and 7-6 (11-9).
In Saturday's semifinals, Tursunov will face Murray, and Clement plays Safin.
The tournament's eventual winner will pocket $74,250.