2011 Concurso Internacional de Tenis – San Sebastián – Singles

Albert Ramos was the defending champion. He won for the second consecutive year, defeating Pere Riba in the final 6–1, 6–2.

Seeds
• # 🇪🇸 Albert Ramos (champion)

• # 🇪🇸 Pere Riba (final)

• # 🇪🇸 Daniel Gimeno-Traver (semifinals)

• # Thiemo de Bakker (first round)

• # 🇫🇷 Benoît Paire (first round)

• # 🇫🇷 Augustin Gensse (second round, retired)

• # 🇪🇸 Guillermo Olaso (first round, retired due to fever)

• # 🇪🇸 Roberto Bautista-Agut (quarterfinals)