See main article: 2009 Copa Petrobras São Paulo. Juan-Martín Aranguren and Franco Ferreiro were the defending champions, but they chose to not compete together.
Aranguren partnered with Sebastián Decoud, but they lost to Ricardo Hocevar and João Souza in the quarterfinal.
Ferreiro decided to play with Ricardo Mello. They reached the final, when they won 6–3, 6–3, against Diego Junqueira and David Marrero.