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METZ, France (AP)—Top-seeded Gael Monfils reached the Open de Moselle semifinals when Janko Tipsarevic of Serbia injured his right ankle and retired on Friday.

Next up will be fellow Frenchman Richard Gasquet, who rallied to beat fourth-seeded Philipp Petzschner of Germany 6-7 (2), 6-1, 6-3.

Petzschner served 16 aces but Gasquet managed to break him five times.

Monfils and Gasquet, both 23 and based in Switzerland, will meet in Metz for a third time. Both beat the other at the quarterfinal stage en route to reaching the final, Gasquet in 2004 and Monfils in 2005. Gasquet leads 2-1 overall.

Paul-Henri Mathieu was the third Frenchman to advance, reaching the semifinals for a second consecutive year with a 6-2, 3-6, 6-3 win over seventh-seeded Andreas Beck of Germany.

The third-seeded Mathieu hit 18 aces and converted three break points.

Mathieu is looking to reach his second final of the year after losing to Nikolay Davydenko in Hamburg. He will next play second-seeded Philipp Kohlschreiber of Germany, who beat Evgeny Korolev of Russia 6-1, 6-3.

Kohlschreiber broke Korolev four times and lost only seven points on his serve to oust the Russian in less than an hour.

Mathieu won his only previous meeting with Kohlschreiber, on clay in Gstaad six years ago.