2009 Bank Austria-TennisTrophy – Singles

Philipp Petzschner was the defending champion, but withdrew before the tournament.

Jürgen Melzer defeated Marin Čilić in the final 6–4, 6–3 in his hometown of Vienna.

Seeds
• # Marin Čilić (final)

• # 🇨🇿 Radek Štěpánek (quarterfinals)

• # 🇫🇷 Gaël Monfils (quarterfinals)

• # 🇩🇪 Philipp Kohlschreiber (semifinals)

• # 🇪🇸 Nicolás Almagro (quarterfinals)

• # 🇪🇸 Feliciano López (quarterfinals)

• # 🇦🇹 Jürgen Melzer (champion)

• # 🇺🇸 John Isner (first round)