The 1991 Supercopa Libertadores was the fourth season of the Supercopa Libertadores, a club football tournament for past Copa Libertadores winners. The tournament was won by Cruzeiro, who beat River Plate 3–2 on aggregate in the final.
| 1991 Supercopa Libertadores João Havelange | |
|---|---|
| Tournament details | |
| Teams | 14 (from 5 confederations) |
| Final positions | |
| Champions |  Cruzeiro (1st title) |
| Runners-up |  River Plate |
| Tournament statistics | |
| Matches played | 26 |
| Goals scored | 53 (2.04 per match) |
| Top scorer(s) | Juan José Borrelli Charles Gaúcho Sergio Martínez (3 goals) |
As the new reigning Copa Libertadores champions, Chilean side Colo-Colo were admitted into the competition.
Former Copa Libertadores winners Atlético Nacional did not take part.
Qualified teams
Up until the middle of 1991, 15 teams had won the Copa Libertadores at least once since its inaugural season in 1960; however, only 14 teams participated as Atlético Nacional declined to play in the tournament.
Bracket
| First round | Quarter-finals | Semi-finals | Finals | ||||||||||||||||
| Grêmio | 2 | 1 (3) | |||||||||||||||||
| River Plate | 2 | 1 (4) | |||||||||||||||||
| River Plate | 1 | 1 (4) | |||||||||||||||||
| Flamengo | 0 | 2 (3) | |||||||||||||||||
| Estudiantes | 1 | 0 | |||||||||||||||||
| Flamengo | 1 | 2 | |||||||||||||||||
| River Plate | 2 | 3 | |||||||||||||||||
 Peñarol | 0 | 1 | |||||||||||||||||
| Racing | 2 | 0 | |||||||||||||||||
| Peñarol | 3 | 0 | |||||||||||||||||
| Peñarol | 3 | 0 | |||||||||||||||||
| Santos | 2 | 0 | |||||||||||||||||
| Santos | 2 | 0 | |||||||||||||||||
| Argentinos Juniors | 1 | 0 | |||||||||||||||||
| River Plate | 2 | 0 | |||||||||||||||||
| Cruzeiro | 0 | 3 | |||||||||||||||||
 Colo-Colo | 0 | 0 (3) | |||||||||||||||||
| Cruzeiro | 0 | 0 (4) | |||||||||||||||||
| Cruzeiro | 4 | 0 | |||||||||||||||||
| Nacional | 0 | 3 | |||||||||||||||||
| Nacional | 1 | 0 | |||||||||||||||||
| Boca Juniors | 1 | 2 | |||||||||||||||||
| Cruzeiro | 1 | 0 (5) | |||||||||||||||||
 Olimpia | 1 | 0 (4) | |||||||||||||||||
| Olimpia | 1 | 2 | |||||||||||||||||
| Independiente | 1 | 0 | |||||||||||||||||
First round
Teams from the same nation could not be drawn against one another. Olimpia, as the title holders, entered the competition at the quarterfinal stage. Independiente also advanced to that same stage after the initial draw.
| Team 1 | Agg. | Team 2 | 1st leg | 2nd leg |
|---|---|---|---|---|
| River Plate | 3–3 (4-3 p) | Grêmio | 2–2 | 1–1 |
| Peñarol | 3–2 | Racing | 3–2 | 0–0 |
| Argentinos Juniors | 1–2 | Santos | 1–2 | 0–0 |
| Flamengo | 3–1 | Estudiantes | 1–1 | 2–0 |
| Cruzeiro | 0–0 (4-3 p) | Colo-Colo | 0–0 | 0–0 |
| Boca Juniors | 1–3 | Nacional | 1–1 | 0–2 |
Quarterfinals
| Team 1 | Agg. | Team 2 | 1st leg | 2nd leg |
|---|---|---|---|---|
| Peñarol | 3–2 | Santos | 3–2 | 0–0 |
| River Plate | 2–2 (4-3 p) | Flamengo | 1–0 | 1–2 |
| Cruzeiro | 4–3 | Nacional | 4–0 | 0–3 |
| Independiente | 1–3 | Olimpia | 1–1 | 0–2 |
Semi-finals
| Team 1 | Agg. | Team 2 | 1st leg | 2nd leg |
|---|---|---|---|---|
| River Plate | 5–1 | Peñarol | 2–0 | 3–1 |
| Cruzeiro | 1–1 (5-4 p) | Olimpia | 1–1 | 0–0 |
Final
| Team 1 | Agg. | Team 2 | 1st leg | 2nd leg |
|---|---|---|---|---|
| River Plate | 2–3 | Cruzeiro | 2–0 | 0–3 |
| 1991 Supercopa Sudamericana Winners |
|---|
 Cruzeiro First Title |