Gilles Simon upset top-seeded Janko Tipsarevic 6-4, 6-4 Saturday to reach the final of the Thailand Open for the second time.
The fourth-seeded Simon won the title here in 2009 and improved his head-to-head record against Tipsarevic to 5-1. He broke the Serb in his first service game and then saved a break point in the 10th game before clinching the set when Tipsarevic netted a forehand.
The Frenchman then broke for a 5-4 lead in the second after winning a Hawk-Eye challenge on his fourth break point, as the replay system showed his forehand winner clipped the line.
Simon said ''I think I couldn't do any better than that. Janko has been playing amazing tennis since last year. It's difficult to beat him.''
He will play fellow Frenchman Richard Gasquet or Jarkko Nieminen of Finland in the final.