2009 Concurso Internacional de Tenis – San Sebastián – Singles

Pablo Andújar tried to defend his 2008 title; however, he was eliminated by Pedro Clar-Rosselló in the quarterfinal.

Thiemo de Bakker defeated Filip Krajinović 6–2, 6–3 in the final.

Seeds
• # 🇪🇸 Rubén Ramírez Hidalgo (second round)

• # 🇪🇸 Santiago Ventura (second round)

• # 🇪🇸 Pablo Andújar (quarterfinals)

• # Lamine Ouahab (first round)

• # 🇫🇷 Olivier Patience (semifinals)

• # Thiemo de Bakker (champion)

• # 🇪🇸 David Marrero (quarterfinals)

• # 🇪🇸 Pablo Santos (first round)