The final stages of the 2014 Copa Sudamericana were played from October 1 to December 10, 2014. A total of 16 teams competed in the final stages.[1]
The draw of the tournament was held on May 20, 2014, 12:00 UTC−3, at the Sheraton Hotel in Buenos Aires, Argentina.[2]
To determine the bracket starting from the round of 16, the defending champion and the 15 winners of the second stage were assigned a "seed" by draw. The defending champion and the winners from Argentina Zone and Brazil Zone were assigned odd-numbered "seeds", and the winners from ties between South Zone and North Zone were assigned even-numbered "seeds".
The following were the seeding of the 16 teams which qualified for the final stages, which included the defending champion (Lanús) and the 15 winners of the second stage (three from Argentina Zone, four from Brazil Zone, eight from ties between South Zone and North Zone):
| Seed | width=200 | Team |
|---|---|---|
| 1 |  Vitória | |
| 2 | Capiatá | |
| 3 |  River Plate | |
| 4 | Huachipato | |
| 5 | Goiás | |
| 6 | Peñarol | |
| 7 | Lanús | |
| 8 |  Universidad César Vallejo | |
| 9 | Bahia | |
| 10 | Cerro Porteño | |
| 11 | Estudiantes | |
| 12 |  Emelec | |
| 13 | São Paulo | |
| 14 | Libertad | |
| 15 | Boca Juniors | |
| 16 |  Atlético Nacional |
In the final stages, the 16 teams played a single-elimination tournament, with the following rules:[1]
The bracket of the knockout stages was determined by the seeding as follows:[1]
The first legs were played on September 30, October 1 and 14–16, and the second legs were played on October 15–16 and 21–23, 2014.[3]
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----Atlético Nacional won 3–2 on aggregate.
----Tied 1–1 on aggregate, Boca Juniors won on penalties.
----River Plate won 5–1 on aggregate.
----São Paulo won 4–2 on aggregate.
----Tied 1–1 on aggregate, Emelec won on penalties.
----Tied 3–3 on aggregate, Estudiantes won on penalties.
----Cerro Porteño won 3–2 on aggregate.
----Tied 2–2 on aggregate, Universidad César Vallejo won on penalties.
The first legs were played on October 29–30, and the second legs were played on November 5–6, 2014.[4]
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----Atlético Nacional won 2–0 on aggregate.
----Boca Juniors won 5–1 on aggregate.
----River Plate won 5–3 on aggregate.
----São Paulo won 6–5 on aggregate.
The first legs were played on November 19–20, and the second legs were played on November 26–27, 2014.[5]
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----Tied 1–1 on aggregate, Atlético Nacional won on penalties.
----River Plate won 1–0 on aggregate.
See main article: 2014 Copa Sudamericana Finals.
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 was not used, and 30 minutes of extra time was played. If still tied after extra time, the penalty shoot-out was used to determine the winner.[1]
The first leg was played on December 3, and the second leg was played on December 10, 2014.[6]
----River Plate won 3–1 on aggregate.