2011 Poznań Porsche Open – Singles

Denis Gremelmayr was the defending champion. Vincent Millot defeated him in the second round. Rui Machado won the final 6–3, 6–3, against Jerzy Janowicz.

Seeds
• # 🇵🇱 Łukasz Kubot (second round, retired due to wrist injury)

• # Frederico Gil (first round)

• # Rui Machado (champion)

• # 🇫🇷 Éric Prodon (second round)

• # 🇫🇷 Stéphane Robert (semifinals)

• # 🇩🇪 Dustin Brown (second round)

• # 🇩🇪 Denis Gremelmayr (second round)

• # 🇨🇿 Jaroslav Pospíšil (second round)