2009 Copa Petrobras Montevideo – Singles

Peter Luczak chose not to defend his 2008 title.

Pablo Cuevas became the new champion, after beating Nicolás Lapentti 7–5, 6–1 in the final.

Seeds
• # Pablo Cuevas (champion)

• # 🇦🇷 Máximo González (quarterfinals)

• # Paul Capdeville (first round)

• # Nicolás Massú (second round)

• # 🇦🇷 Juan Ignacio Chela (semifinals)

• # 🇪🇸 Santiago Ventura (first round, retired due to right abductor injury)

• # 🇪🇸 Rubén Ramírez Hidalgo (first round)

• # 🇫🇷 Laurent Recouderc (first round)