Simon, the second seed, downed Austria's Jurgen Melzer 6-4, 7-6 (7-3). The fourth-seeded Troicki knocked off top-seeded Jo-Wilfried Tsonga, the defending champion, 1-6, 6-2, 6-3, spoiling a potential all-French final.
"It was a great turnaround," Troicki, a non-title winner, said on the Association of Tennis Professionals Web site. "I took my chances to eventually win the match.
It is a huge match for me, appearing in my second final. I'll definitely give it my best shot to win my first title."
The Simon-Troicki winner receives $100,100.
Simon has won their previous two meetings.
Copyright 2009 by United Press International.