| Group 1 | 10/02/1966 | River Plate | - | Boca Juniors | 2:1 | ||||
| Group 1 | 17/02/1966 | Universitario de Deportes | - | Boca Juniors | 2:1 | ||||
| Group 1 | 18/03/1966 | Boca Juniors | - | Universitario de Deportes | 2:0 | ||||
| Group A | 30/03/1966 | Guaraní | - | Boca Juniors | 1:3 | ||||
| Group A | 07/04/1966 | Boca Juniors | - | Independiente | 0:2 | ||||
| Group A | 14/04/1966 | River Plate | - | Boca Juniors | 2:2 | ||||
| Group A | 19/04/1966 | Boca Juniors | - | Guaraní | 1:1 | ||||
| Group A | 29/04/1966 | Independiente | - | Boca Juniors | 0:0 |
Argentina