2011 Copa Sudamericana preliminary stages
The preliminary stages of the 2011 Copa Bridgestone Sudamericana de Clubes consisted of two stages:
The draw was made in Buenos Aires on June 28, 2011. Sixteen teams (all from rest of South America) competed in the First Stage, where they were drawn into eight ties. The eight winners of the First Stage joined another twenty-two teams (six from Argentina, eight from Brazil, eight from rest of South America) to compete in the Second Stage, where they were drawn into fifteen ties.
Teams played in two-legged ties on a home-away basis. Each team earned 3 points for a win, 1 point for a draw, and 0 points for a loss. The following criteria was used for breaking ties on points:
The fifteen winners of the Second Stage advanced to the round of 16 to join the defending champion Independiente.
Team 1 played the second leg at home.
...
Wikipedia