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| 1st(1st leg) | Pepeganga Margarita | - | Independiente | 0:6 (0:2) | ||
| 2nd (2nd leg) | Independiente | - | Pepeganga Margarita | 3:0 (1:0) | ||
| 1st(1st leg): 04/08/1990 | 2nd (2nd leg): 15/08/1990 | Winner: Independiente | ||||
| 1st(1st leg) | Defensor Sporting | - | River Plate | 1:2 (1:0) | ||
| 2nd (2nd leg) | River Plate | - | Defensor Sporting | 2:1 (0:1) | ||
| 1st(1st leg): 05/08/1990 | 2nd (2nd leg): 12/08/1990 | Winner: River Plate | ||||
| 1st(1st leg) | Universidad Católica | - | The Strongest | 3:1 (2:0) | ||
| 2nd (2nd leg) | The Strongest | - | Universidad Católica | 1:1 (0:0) | ||
| 1st(1st leg): 08/08/1990 | 2nd (2nd leg): 15/08/1990 | Winner: Universidad Católica | ||||
| 1st(1st leg) | Cerro Porteño | - | Atlético Nacional | 0:0 (0:0) | ||
| 2nd (2nd leg) | Atlético Nacional | - | Cerro Porteño | 1:0 (1:0) | ||
| 1st(1st leg): 08/08/1990 | 2nd (2nd leg): 15/08/1990 | Winner: Atlético Nacional | ||||
| 1st(1st leg) | Barcelona | - | Progreso | 2:0 (1:0) | ||
| 2nd (2nd leg) | Progreso | - | Barcelona | 2:2 (0:1) | ||
| 1st(1st leg): 08/08/1990 | 2nd (2nd leg): 14/08/1990 | Winner: Barcelona | ||||
| 1st(1st leg) | Vasco da Gama - RJ | - | Colo-Colo | 0:0 (0:0) | ||
| 2nd (2nd leg) | Colo-Colo | - | Vasco da Gama - RJ | 4:5 (2:0, 3:3, 3:3) pso | ||
| 1st(1st leg): 08/08/1990 | 2nd (2nd leg): 15/08/1990 | Winner: Vasco da Gama - RJ | ||||
| 1st(1st leg) | Unión Huaral | - | Emelec | 1:0 (0:0) | ||
| 2nd (2nd leg) | Emelec | - | Unión Huaral | 2:0 (0:0) | ||
| 1st(1st leg): 09/08/1990 | 2nd (2nd leg): 15/08/1990 | Winner: Emelec | ||||
