| 1. Round | 02/08/2003 | San Lorenzo | - | Chacarita Juniors | 1:2 | ||||
| 2. Round | 09/08/2003 | Racing Club | - | San Lorenzo | 1:0 | ||||
| 4. Round | 22/08/2003 | Talleres de Córdoba | - | San Lorenzo | 0:3 | ||||
| 5. Round | 30/08/2003 | San Lorenzo | - | Atlético Rafaela | 1:1 | ||||
| 6. Round | 27/09/2003 | Nueva Chicago | - | San Lorenzo | 1:2 | ||||
| 7. Round | 30/09/2003 | San Lorenzo | - | Estudiantes | 1:0 | ||||
| 8. Round | 04/10/2003 | Newell's Old Boys | - | San Lorenzo | 0:1 | ||||
| 9. Round | 11/10/2003 | San Lorenzo | - | Independiente | 2:1 | ||||
| 10. Round | 18/10/2003 | River Plate | - | San Lorenzo | 1:2 | ||||
| 11. Round | 25/10/2003 | San Lorenzo | - | Quilmes | 0:1 |  |
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| 12. Round | 28/10/2003 | Arsenal de Sarandí | - | San Lorenzo | 0:2 | ||||
| 13. Round | 01/11/2003 | San Lorenzo | - | Olimpo de Bahía Blanca | 2:0 | ||||
| 14. Round | 08/11/2003 | Colón de Santa Fe | - | San Lorenzo | 1:1 | ||||
| 15. Round | 22/11/2003 | San Lorenzo | - | Banfield | 1:0 | ||||
| 17. Round | 29/11/2003 | Rosario Central | - | San Lorenzo | 0:2 | ||||
| 18. Round | 06/12/2003 | San Lorenzo | - | Vélez Sarsfield | 4:1 | ||||
| 19. Round | 13/12/2003 | Boca Juniors | - | San Lorenzo | 1:0 |
Chile