| WC Qualifiers South America 2000/2001 - Appearances as Referee |  |
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| 24/07/2000 | Ecuador | - | Colombia | 0:0 | 4 | - | - |
| 07/10/2000 | Venezuela | - | Brazil | 0:6 | 1 | - | - |
| 07/10/2000 | Ecuador | - | Chile | 1:0 | 7 | - | - |
| WC Qualifiers South America 2000/2001 - Appearances as Referee | |
|
|
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| 24/07/2000 | Ecuador | - | Colombia | 0:0 | 4 | - | - |
| 07/10/2000 | Venezuela | - | Brazil | 0:6 | 1 | - | - |
| 07/10/2000 | Ecuador | - | Chile | 1:0 | 7 | - | - |
| Complete name: | Ubaldo Aquino Valenzano |
| Born: | 02/05/1958 |
| Place of birth: |
Paraguay |
| Nationality: |
Paraguay |
| Height: | 179 cm |
| Weight: | 77 kg |