2017 Copa Sudamericana final stages

The 2017 Copa Sudamericana final stages was played from 22 August to 13 December 2017. A total of 16 teams competed in the final stages to decide the champions of the 2017 Copa Sudamericana.

Qualified teams

The 16 winners of the second stage advanced to the round of 16.

Starting from the round of 16, the teams were seeded according to the second stage draw, with each team assigned a "seed" 1–16 corresponding to the tie they won.

Seed

Match

Second stage winners

Format

Starting from the round of 16, the teams played a single-elimination tournament with the following rules:

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, extra time would not be played, and the penalty shoot-out would be used to determine the winner.
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.

Bracket

The bracket starting from the round of 16 was determined as follows:

Round	Matchups
Round of 16	Match A: Winner O1 vs. Winner O16 Match B: Winner O2 vs. Winner O15 Match C: Winner O3 vs. Winner O14 Match D: Winner O4 vs. Winner O13 Match E: Winner O5 vs. Winner O12 Match F: Winner O6 vs. Winner O11 Match G: Winner O7 vs. Winner O10 Match H: Winner O8 vs. Winner O9
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	Match F1: Winner S1 vs. Winner S4 Match F2: Winner S2 vs. Winner S3
Finals	Winner F1 vs. Winner F2

The bracket was decided based on the second stage draw, which was held on 14 June 2017.

Round of 16

The first legs were played on 22–24 August and 12–14 September, and the second legs were played on 12, 14 and 19–21 September 2017.

Match A

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''Tied 1–1 on aggregate, Racing won on away goals and advanced to the quarterfinals.''

Match B

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''Junior won 3–1 on aggregate and advanced to the quarterfinals.''

Match C

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''Flamengo won 4–0 on aggregate and advanced to the quarterfinals.''

Match D

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''Nacional won 2–0 on aggregate and advanced to the quarterfinals.''

Match E

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''Independiente won 2–1 on aggregate and advanced to the quarterfinals.''

Match F

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''Tied 2–2 on aggregate, Fluminense won on away goals and advanced to the quarterfinals.''

Match G

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''Sport Recife won 3–2 on aggregate and advanced to the quarterfinals.''

Match H

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''Libertad won 2–1 on aggregate and advanced to the quarterfinals.''

Quarterfinals

The first legs were played on 24–26 October, and the second legs were played on 1 and 2 November 2017.

Match S1

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''Libertad won 1–0 on aggregate and advanced to the semifinals.''

Match S2

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''Junior won 2–0 on aggregate and advanced to the semifinals.''

Match S3

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''Flamengo won 4–3 on aggregate and advanced to the semifinals.''

Match S4

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''Independiente won 6–1 on aggregate and advanced to the semifinals.''

Semifinals

The first legs were played on 21 and 23 November, and the second legs will be played on 28 and 30 November 2017.

Match F1

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''Independiente won 3–2 on aggregate and advanced to the [|finals].''

Match F2

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''Flamengo won 4–1 on aggregate and advanced to the finals.''

Finals

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.
The first leg was played on 6 December, and the second leg was played on 13 December 2017.

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Independiente won 3–2 on aggregate.