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| 1st(1st leg) | Deportivo Táchira | - | Flamengo RJ | 2:3 (0:2) | ||
| 2nd (2nd leg) | Flamengo RJ | - | Deportivo Táchira | 5:0 (1:0) | ||
| 1st(1st leg): 16/04/1991 | 2nd (2nd leg): 24/04/1991 | Winner: Flamengo RJ | ||||
| 1st(1st leg) | Deportes Concepción | - | América de Cali | 0:3 (0:2) | ||
| 2nd (2nd leg) | América de Cali | - | Deportes Concepción | 3:3 (2:1) | ||
| 1st(1st leg): 16/04/1991 | 2nd (2nd leg): 25/04/1991 | Winner: América de Cali | ||||
| 1st(1st leg) | Universitario de Deportes | - | Colo-Colo | 0:0 (0:0) | ||
| 2nd (2nd leg) | Colo-Colo | - | Universitario de Deportes | 2:1 (1:0) | ||
| 1st(1st leg): 17/04/1991 | 2nd (2nd leg): 24/04/1991 | Winner: Colo-Colo | ||||
| 1st(1st leg) | LDU Quito | - | Atlético Nacional | 2:2 (1:1) | ||
| 2nd (2nd leg) | Atlético Nacional | - | LDU Quito | 2:0 (1:0) | ||
| 1st(1st leg): 17/04/1991 | 2nd (2nd leg): 25/04/1991 | Winner: Atlético Nacional | ||||
| 1st(1st leg) | Atlético Colegiales | - | Club Olimpia | 1:1 (1:0) | ||
| 2nd (2nd leg) | Club Olimpia | - | Atlético Colegiales | 2:1 (1:0) | ||
| 1st(1st leg): 17/04/1991 | 2nd (2nd leg): 26/04/1991 | Winner: Club Olimpia | ||||
| 1st(1st leg) | Nacional | - | Bolívar | 4:1 (2:1) | ||
| 2nd (2nd leg) | Bolívar | - | Nacional | 1:1 (0:1) | ||
| 1st(1st leg): 17/04/1991 | 2nd (2nd leg): 24/04/1991 | Winner: Nacional | ||||
| 1st(1st leg) | Boca Juniors | - | Corinthians SP | 3:1 (2:1) | ||
| 2nd (2nd leg) | Corinthians SP | - | Boca Juniors | 1:1 (0:0) | ||
| 1st(1st leg): 17/04/1991 | 2nd (2nd leg): 24/04/1991 | Winner: Boca Juniors | ||||
| 1st(1st leg) | Oriente Petrolero | - | Cerro Porteño | 1:1 (0:1) | ||
| 2nd (2nd leg) | Cerro Porteño | - | Oriente Petrolero | 2:0 (1:0) | ||
| 1st(1st leg): 19/04/1991 | 2nd (2nd leg): 24/04/1991 | Winner: Cerro Porteño | ||||
