[3] Thirty-two teams (all from rest of South America) competed in the First Stage, where they were drawn into sixteen ties.
Teams played in two-legged ties on a home-away basis.
The following criteria were used for breaking ties on points:[4] The fifteen winners of the Second Stage advanced to the round of 16 to join the defending champion Universidad de Chile.
Note: Second leg postponed from September 19 due to bad weather.
Tied on points 2–2, Atlético Goianiense won on penalties.
Tied on points 3–3, Universidad Católica won on away goals.
Tied on points 3–3, LDU Loja won on away goals.