The 2015 Copa Sudamericana final stages were played from September 22 to December 9, 2015. A total of 16 teams competed in the final stages to decide the champions of the 2015 Copa Sudamericana.[1]
Qualified teams
The 15 winners of the second stage (eight from winners of the first stage, four from Brazil, three from Argentina) and the defending champions qualified for the final stages.
The qualified teams were seeded in the final stages according to the draw of the tournament, which was held on July 16, 2015, 20:00 UTC−4, at the Salón Joao Havelange of the CONMEBOL Convention Centre in Luque, Paraguay, with each team assigned a "seed" 1–16 by draw.[1][2]
Each tie was played on a home-and-away two-legged basis, with the higher-seeded team hosting the second leg.
In the round of 16, quarterfinals, and semifinals, if tied on aggregate, the away goals rule would be used. If still tied, the penalty shoot-out would be used to determine the winner (no extra time would be played).
In the finals, if tied on aggregate, the away goals rule would not be used, and 30 minutes of extra time would be played. If still tied after extra time, the penalty shoot-out would be used to determine the winner.
If there were two semifinalists from the same association, they would have to play each other.
Bracket
The bracket of the knockout stages was determined by the seeding as follows:[1]
Round of 16:
Match A: Seed 1 vs. Seed 16
Match B: Seed 2 vs. Seed 15
Match C: Seed 3 vs. Seed 14
Match D: Seed 4 vs. Seed 13
Match E: Seed 5 vs. Seed 12
Match F: Seed 6 vs. Seed 11
Match G: Seed 7 vs. Seed 10
Match H: Seed 8 vs. Seed 9
Quarterfinals:
Match S1: Winner A vs. Winner H
Match S2: Winner B vs. Winner G
Match S3: Winner C vs. Winner F
Match S4: Winner D vs. Winner E
Semifinals: (if there were two semifinalists from the same association, they would have to play each other)
The finals were played on a home-and-away two-legged basis, with the higher-seeded team hosting the second leg. If tied on aggregate, the away goals rule would not be used, and 30 minutes of extra time would be played. If still tied after extra time, the penalty shoot-out would be used to determine the winner.[1]
The first leg was played on December 2, and the second leg was played on December 9, 2015.[6]