| Copa Libertadores 1997 - Appearances as Referee |  |
 |
 |
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| 06/03/1997 | Peñarol | - | Millonarios | 2:1 | 6 | - | 1 |
| 17/03/1997 | Cruzeiro | - | Alianza Lima | 2:0 | 3 | - | 2 |
| 29/07/1997 | Colo-Colo | - | Cruzeiro | 1:4 pso | 4 | 2 | 1 |
| Copa Libertadores 1997 - Appearances as Referee | |
|
|
||||
| 06/03/1997 | Peñarol | - | Millonarios | 2:1 | 6 | - | 1 |
| 17/03/1997 | Cruzeiro | - | Alianza Lima | 2:0 | 3 | - | 2 |
| 29/07/1997 | Colo-Colo | - | Cruzeiro | 1:4 pso | 4 | 2 | 1 |
| Complete name: | Ubaldo Aquino Valenzano |
| Born: | 02/05/1958 |
| Place of birth: |
Paraguay |
| Nationality: |
Paraguay |
| Height: | 179 cm |
| Weight: | 77 kg |