2011 AON Open Challenger – Singles

Fabio Fognini was the defending champion but decided not to participate. Martin Kližan won the title after defeating Leonardo Mayer 6–3, 6–1 in the final.

Seeds
• # 🇪🇸 Pablo Andújar (first round)

• # 🇦🇷 Carlos Berlocq (withdrew)

• # Rui Machado (quarterfinals)

• # 🇮🇹 Filippo Volandri (second round, retired due to low back pain)

• # 🇰🇿 Andrey Golubev (first round)

• # 🇸🇰 Martin Kližan (champion)

• # 🇦🇷 Diego Junqueira (first round)

• # Frederico Gil (semifinals)

• # 🇦🇷 Horacio Zeballos (semifinals)