2009 Copa Petrobras Asunción – Singles

Martín Vassallo Argüello chose to not defend his 2008 title.

Ramón Delgado won the tournament in his own country, after defeating Daniel Gimeno-Traver 7–6(2), 1–6, 6–3 in the final.

Seeds
• # 🇦🇷 Máximo González (second round)

• # Nicolás Massú (first round)

• # Paul Capdeville (first round)

• # 🇪🇸 Santiago Ventura (quarterfinals)

• # 🇪🇸 Daniel Gimeno-Traver (final)

• # 🇪🇸 Rubén Ramírez Hidalgo (first round, retired due to right wrist injury)

• # 🇫🇷 Laurent Recouderc (first round, retired due to right thigh injury)

• # Blaž Kavčič (semifinals)