2009 Gerry Weber Open – Singles

Roger Federer was the defending champion, but withdrew due to fatigue, after winning the 2009 French Open.

Tommy Haas won in the final 6–3, 6–7(4–7), 6–1, against Novak Djokovic.

Seeds
• # Roger Federer (withdrew due to fatigue)

• # 🇷🇸 Novak Djokovic (final)

• # 🇪🇸 Fernando Verdasco (first round)

• # 🇫🇷 Jo-Wilfried Tsonga (second round)

• # 🇨🇿 Tomáš Berdych (second round)

• # 🇷🇺 Dmitry Tursunov (second round)

• # 🇦🇹 Jürgen Melzer (quarterfinals)

• # 🇩🇪 Rainer Schüttler (second round)