Indianapolis, IN -- (Sports Network) - Top-seeded American James Blake was knocked off by No. 3 Dmitry Tursunov on Saturday in the semifinals of the $525,000 Indianapolis Tennis Championships.

Tursunov won in comeback fashion, 4-6, 6-3, 6-4 to advance to Sunday's final. Tursunov will be looking for back-to-back titles in this tournament after he beat Canadian Frank Dancevic in last year's Indy final.

His opponent on Sunday will be second-seed Gilles Simon, who also needed all three sets to move on. Simon got by No. 4 Sam Querrey, 6-3, 4-6, 6-4.

The 2008 Indianapolis titlist will pocket $83,500.