MUNICH — Philipp Petzschner upset defending champion Tomas Berdych 1-6, 6-3, 6-4 Friday and reach the semifinals of the BMW Open.

Two-time runner-up Mikhail Youzhny of Russia, who lost last year's final to Berdych, eased into the last four by defeating Jiri Hajek 6-1, 6-3.

Marcos Baghdatis reached his second semifinal of the year by stopping Philip Kohlschreiber of Germany 6-3, 6-4. Kohlschreiber won the tournament in 2007.

Baghdatis saved three break points before serving out the match.

The third-seeded Berdych had won both previous matches against Petzschner, but the German broke Berdych's serve for a decisive 5-4 lead in the third set, after Berdych had saved three break points.

Petzschner will next play the second-seeded Youzhny.