2010 Copa Sudamericana preliminary stages

The preliminary stages of the 2010 Copa Sudamericana de Clubes are: * First Stage, contested by 16 teams in 8 two-legged ties. The winner of each tie will advance to the Second Stage. * Second Stage, contested by 30 teams, 8 of whom advanced from the First Stage, in 15 two-legged ties. The winner of each tie will advance to the Round of 16, joining the defending champion, LDU Quito.

2010 Copa Sudamericana preliminary stages

The preliminary stages of the 2010 Copa Sudamericana de Clubes are: * First Stage, contested by 16 teams in 8 two-legged ties. The winner of each tie will advance to the Second Stage. * Second Stage, contested by 30 teams, 8 of whom advanced from the First Stage, in 15 two-legged ties. The winner of each tie will advance to the Round of 16, joining the defending champion, LDU Quito.