2011 Copa Petrobras Montevideo – Singles

Máximo González was the defending champion, but he lost in the final 2–6, 5–7 against Carlos Berlocq.

Seeds
• # 🇦🇷 Carlos Berlocq (champion)

• # 🇦🇷 Leonardo Mayer (semifinals)

• # 🇦🇷 Diego Junqueira (second round)

• # 🇧🇷 João Souza (quarterfinals)

• # 🇧🇷 Rogério Dutra da Silva (quarterfinals)

• # 🇦🇷 Máximo González (final)

• # 🇺🇸 Wayne Odesnik (first round)

• # 🇮🇹 Alessandro Giannessi (semifinals)