2011 Santos Brasil Tennis Open – Singles

João Souza became the champion after beating Diego Junqueira in straight sets 6–4, 6–2.

Seeds
• # 🇧🇷 Ricardo Mello (semifinals)

• # 🇧🇷 Marcos Daniel (first round)

• # 🇫🇷 Éric Prodon (second round)

• # 🇯🇵 Tatsuma Ito (second round, retired due to cramping)

• # 🇦🇷 Diego Junqueira (final)

• # 🇦🇷 Leonardo Mayer (quarterfinals)

• # 🇧🇷 João Souza (champion)

• # 🇦🇷 Juan Pablo Brzezicki (semifinals, retired)