2009 Estoril Open – Men's singles

Roger Federer was the defending champion, but chose not to play that year. Albert Montañés won the title, notably by saving match points in quarterfinal and final match.

Seeds
• # 🇫🇷 Gilles Simon (quarterfinals)

• # 🇷🇺 Nikolay Davydenko (semifinals)

• # 🇪🇸 David Ferrer (second round)

• # 🇺🇸 James Blake (final)

• # 🇦🇷 David Nalbandian (first round)

• # 🇺🇸 Mardy Fish (quarterfinals)

• # 🇪🇸 Albert Montañés (champion)

• # 🇫🇷 Florent Serra (quarterfinals)