Nikolay Davydenko defeats Marin Cilic

MUNICH -- Nikolay Davydenko defeated 2010 runner-up Marin Cilic 7-5, 6-3 on Friday to reach the semifinals of the BMW Open.

Davydenko will play Radek Stepanek of the Czech Republic, who beat 2007 Munich champion Philipp Kohlschreiber of Germany, 6-4, 6-0.

Philipp Petzschner of Germany edged Potito Starace of Italy 7-6 (3), 7-6 (6) to set up a semifinal against Florian Mayer. He defeated Bulgarian teen Gregori Dimitrov 7-6 (4), 3-6, 6-4.

The 69th-ranked Dimitrov turns 20 next month and is the only teen in the top 100. It was his first quarterfinal appearance on the tour.

Despite hitting eight aces, the Bulgarian could not match the steady play of Mayer, who reached his third semifinal of the year.

The last time two German players were in the Munich semifinals was in 1994, when Michael Stich and Bernd Karbacher reached the last four. Kohlschreiber was the last German winner.