2009 Allianz Suisse Open Gstaad – Singles

Victor Hănescu was the defending champion, but lost in the second round to Florent Serra.

Thomaz Bellucci won in the final 6–4, 7–6(7–2), against Andreas Beck.

Seeds
• # Stanislas Wawrinka (second round)

• # 🇩🇪 Philipp Kohlschreiber (first round)

• # 🇷🇺 Igor Andreev (semifinals)

• # 🇷🇴 Victor Hănescu (second round, retired)

• # 🇫🇷 Jérémy Chardy (quarterfinals)

• # 🇩🇪 Nicolas Kiefer (quarterfinals, retired)

• # 🇪🇸 Feliciano López (first round)

• # 🇫🇷 Paul-Henri Mathieu (first round)