2009 Abierto Mexicano Telcel – Men's singles

Nicolás Almagro was the defending champion, and defeated Gaël Monfils 6–4, 6–4, in the final.

Seeds
• # 🇦🇷 David Nalbandian (first round)

• # 🇫🇷 Gaël Monfils (final)

• # 🇪🇸 Tommy Robredo (quarterfinals)

• # 🇪🇸 Nicolás Almagro (champion)

• # 🇦🇷 José Acasuso (semifinals)

• # 🇪🇸 Albert Montañés (second round)

• # 🇪🇸 Marcel Granollers (second round)

• # 🇪🇸 Carlos Moyá (second round)

Seeds
• # 🇦🇹 Daniel Köllerer (qualified)

• # 🇪🇸 Rubén Ramírez Hidalgo (qualified)

• # 🇫🇷 Olivier Patience (qualified)

• # Pablo Cuevas (qualified)

• # 🇦🇷 Horacio Zeballos (qualifying competition)

• # 🇦🇷 Sebastián Decoud (first round)

• # 🇪🇸 Miguel Ángel López Jaén (qualifying competition)

• # 🇵🇱 Łukasz Kubot (qualifying competition)

Qualifiers
• # 🇦🇹 Daniel Köllerer

• # 🇪🇸 Rubén Ramírez Hidalgo

• # 🇫🇷 Olivier Patience

• # Pablo Cuevas