The 2009 BMW Open was a tennis tournament that was played on outdoor clay courts. It was the 94th edition of the BMW Open, and part of the ATP World Tour 250 series of the 2009 ATP World Tour. The men's events took place in Munich, Germany, from 2 May through 10 May 2009.
The men's draw was headlined by the defending champions, Chilean Fernando González and Croatian Marin Čilić.
| Player | Nationality | Ranking* | Seeding | |
|---|---|---|---|---|
| Fernando González | Chile | 13 | 1 | |
| Marin Čilić | Croatia | 15 | 2 | |
| Nicolás Almagro |  Spain | 21 | 3 | |
| Tomáš Berdych |  Czech Republic | 26 | 4 | |
| Rainer Schüttler | Germany | 29 | 5 | |
| Nicolas Kiefer | Germany | 30 | 6 | |
| Paul-Henri Mathieu |  France | 35 | 7 | |
| Igor Kunitsyn |  Russia | 38 | 8 |
The following players received wildcards into the main draw:
The following players received entry from the qualifying draw:
Alexander PeyaSee main article: 2009 BMW Open – Singles. Tomáš Berdych defeated Mikhail Youzhny, 6–4, 4–6, 7–6(7–5)
See main article: 2009 BMW Open – Doubles. Jan Hernych / Ivo Minář defeated 
Ashley Fisher / Jordan Kerr, 6–4, 6–4