| 1. Round | 12/08/2018 | Belgrano de Córdoba | - | San Martín de San Juan | 0:0 | ||||
| 2. Round | 19/08/2018 | San Martín de San Juan | - | Patronato de Paraná | 1:0 | ||||
| 3. Round | 25/08/2018 | Tigre | - | San Martín de San Juan | 2:2 | ||||
| 4. Round | 01/09/2018 | San Martín de San Juan | - | Huracán | 1:2 | ||||
| 5. Round | 15/09/2018 | River Plate | - | San Martín de San Juan | 4:1 | ||||
| 6. Round | 23/09/2018 | San Martín de San Juan | - | Atlético Tucumán | 1:3 | ||||
| 8. Round | 06/10/2018 | San Martín de San Juan | - | Vélez Sarsfield | 3:1 | ||||
| 9. Round | 23/10/2018 | San Lorenzo | - | San Martín de San Juan | 2:1 | ||||
| 13. Round | 21/11/2018 | Gimnasia de La Plata | - | San Martín de San Juan | 0:2 | ||||
| 7. Round | 28/11/2018 | Rosario Central | - | San Martín de San Juan | 1:0 | ||||
| 19. Round | 17/02/2019 | San Martín de San Juan | - | Independiente | 1:1 | ||||
| 20. Round | 26/02/2019 | Newell's Old Boys | - | San Martín de San Juan | 3:0 | ||||
| 21. Round | 02/03/2019 | San Martín de San Juan | - | Godoy Cruz | 0:0 | ||||
| 22. Round | 08/03/2019 | Lanús | - | San Martín de San Juan | 1:1 | ||||
| 23. Round | 16/03/2019 | San Martín de San Juan | - | Argentinos Juniors | 2:3 |
Argentina
Paraguay