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| 1st(1st leg) | LDU Quito | - | Barcelona | 2:0 (2:0) | ||
| 2nd (2nd leg) | Barcelona | - | LDU Quito | 2:1 (1:1) | ||
| 1st(1st leg): 29/07/2003 | 2nd (2nd leg): 12/08/2003 | Winner: LDU Quito | ||||
| 1st(1st leg) | Monagas | - | CD Italchacao | 1:2 (1:1) | ||
| 2nd (2nd leg) | CD Italchacao | - | Monagas | 1:0 (1:0) | ||
| 1st(1st leg): 31/07/2003 | 2nd (2nd leg): 05/08/2003 | Winner: CD Italchacao | ||||
| 1st(1st leg) | Universidad Católica | - | Provincial Osorno (old) | 0:1 (0:1) | ||
| 2nd (2nd leg) | Provincial Osorno (old) | - | Universidad Católica | 3:5 (1:2, 1:2) pso | ||
| 1st(1st leg): 05/08/2003 | 2nd (2nd leg): 02/09/2003 | Winner: Universidad Católica | ||||
| 1st(1st leg) | Independiente | - | Rosario Central | 1:1 (1:0) | ||
| 2nd (2nd leg) | Rosario Central | - | Independiente | 0:1 (0:1) | ||
| 1st(1st leg): 06/08/2003 | 2nd (2nd leg): 04/09/2003 | Winner: Independiente | ||||
| 1st(1st leg) | Deportivo Pasto | - | Atlético Nacional | 0:0 (0:0) | ||
| 2nd (2nd leg) | Atlético Nacional | - | Deportivo Pasto | 2:1 (1:1) | ||
| 1st(1st leg): 06/08/2003 | 2nd (2nd leg): 21/08/2003 | Winner: Atlético Nacional | ||||
| 1st(1st leg) | The Strongest | - | Bolívar | 2:2 (1:0) | ||
| 2nd (2nd leg) | Bolívar | - | The Strongest | 1:1 (0:0) | ||
| 1st(1st leg): 07/08/2003 | 2nd (2nd leg): 19/08/2003 | Winner: Bolívar | ||||
| 1st(1st leg) | Cienciano | - | Alianza Lima | 1:0 (1:0) | ||
| 2nd (2nd leg) | Alianza Lima | - | Cienciano | 0:1 (0:1) | ||
| 1st(1st leg): 07/08/2003 | 2nd (2nd leg): 26/08/2003 | Winner: Cienciano | ||||
| 1st(1st leg) | Colón de Santa Fe | - | Vélez Sarsfield | 3:1 (1:0) | ||
| 2nd (2nd leg) | Vélez Sarsfield | - | Colón de Santa Fe | 1:4 (0:1) | ||
| 1st(1st leg): 12/08/2003 | 2nd (2nd leg): 28/08/2003 | Winner: Colón de Santa Fe | ||||
| 1st(1st leg) | CD Italchacao | - | San Lorenzo | 1:2 (0:0) | ||
| 2nd (2nd leg) | San Lorenzo | - | CD Italchacao | 6:0 (3:0) | ||
| 1st(1st leg): 14/08/2003 | 2nd (2nd leg): 20/08/2003 | Winner: San Lorenzo | ||||
| 1st(1st leg) | Guaraní | - | Libertad | 0:1 (0:1) | ||
| 2nd (2nd leg) | Libertad | - | Guaraní | 4:2 (0:1, 0:1, 0:1) pso | ||
| 1st(1st leg): 14/08/2003 | 2nd (2nd leg): 28/08/2003 | Winner: Libertad | ||||
| 1st(1st leg) | Danubio | - | Nacional | 0:1 (0:0) | ||
| 2nd (2nd leg) | Nacional | - | Danubio | 2:2 (2:0) | ||
| 1st(1st leg): 26/08/2003 | 2nd (2nd leg): 18/09/2003 | Winner: Nacional | ||||
