| 1. Round | 06/08/1998 | San Lorenzo | - | Platense | 2:2 | ||||
| 2. Round | 15/08/1998 | Colón de Santa Fe | - | San Lorenzo | 2:0 | ||||
| 6. Round | 10/09/1998 | Argentinos Juniors | - | San Lorenzo | 1:5 | ||||
| 7. Round | 19/09/1998 | Talleres de Córdoba | - | San Lorenzo | 2:2 | ||||
| 8. Round | 26/09/1998 | San Lorenzo | - | Rosario Central | 4:1 |  |
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| 9. Round | 03/10/1998 | Independiente | - | San Lorenzo | 3:1 | ||||
| 11. Round | 17/10/1998 | Unión de Santa Fe | - | San Lorenzo | 3:6 | |
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| 12. Round | 22/10/1998 | San Lorenzo | - | Ferro Carril Oeste | 2:1 | ||||
| 13. Round | 31/10/1998 | Gimnasia de Jujuy | - | San Lorenzo | 3:2 |  |
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| 15. Round | 14/11/1998 | Gimnasia de La Plata | - | San Lorenzo | 3:2 | |
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| 18. Round | 05/12/1998 | San Lorenzo | - | Newell's Old Boys | 2:2 | ||||
| 19. Round | 12/12/1998 | Racing Club | - | San Lorenzo | 3:2 |
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