Guillermo Velasquez Ramirez - Football referee
| Copa Libertadores 1980 | ||||
| group stage | Nacional (UR) | The Strongest | 1980-04-30 | 2 - 0 |
| friendly | ||||
| Hungary | Romania | 1980-01-11 | 2 - 2 | |
| Brazil | Ireland | 1974-05-05 | 2 - 1 | |
| Colombia OT | Santos FC | 1968-07-17 | 2 - 4 | |
| Copa Libertadores 1978 | ||||
| group stage | Alianza Lima | Sporting Cristal | 1978-07-05 | 2 - 2 |
| group stage | LDU Quito | Independiente | 1978-06-27 | 1 - 0 |
| Copa Libertadores 1977 | ||||
| group stage | Estudiantes de Merida | Sport Boys | 1977-05-27 | 1 - 0 |
| group stage | El Nacional | Deportivo Cuenca | 1977-04-03 | 0 - 0 |
| WC 1978 qualifiers - S America | ||||
| Venezuela | Uruguay | 1977-02-09 | 1 - 1 | |
| WC 1978 qualifiers - Am/Caribbean | ||||
| play-offs | Canada | USA | 1976-12-22 | 3 - 0 |
| play-offs | Canada | USA | 1976-12-22 | 3 - 0 |
| Olympic Games 1976 | ||||
| 1/4 finals | Soviet Union OT | Iran OT | 1976-06-25 | 2 - 1 |
| Copa Libertadores 1976 | ||||
| 1/2 final stage | Independiente | Peñarol | 1976-05-26 | 1 - 0 |
| 1/2 final stage | LDU Quito | Alianza Lima | 1976-05-05 | 2 - 1 |
| group stage | Palestino | Nacional (UR) | 1976-03-14 | 2 - 1 |
| group stage | Olimpia Asuncion | Sportivo Luqueño | 1976-03-07 | 2 - 3 |
| group stage | Millonarios | Santa Fe | 1976-03-04 | 1 - 1 |
| Copa Libertadores 1975 | ||||
| 1/2 final stage | LDU Quito | Universitario | 1975-05-04 | 0 - 0 |
| Copa Libertadores 1974 | ||||
| 1/2 final stage | Huracán | Peñarol | 1974-09-25 | 0 - 3 |
| group stage | Portuguesa (Ven) | Atlético Nacional | 1974-02-21 | 0 - 0 |
| group stage | Valencia FC (ven) | Atlético Nacional | 1974-02-19 | 1 - 2 |
| group stage | Atlético Nacional | Millonarios | 1974-02-14 | 0 - 3 |
| Copa Libertadores 1973 | ||||
| group stage | Peñarol | Botafogo | 1973-03-14 | 2 - 2 |
| Olympic Games 1972 | ||||
| 2nd stage | Soviet Union OT | Morocco OT | 1972-09-03 | 3 - 0 |
| 1st stage | Hungary OT | Iran OT | 1972-08-27 | 5 - 0 |
| Copa Libertadores 1972 | ||||
| 1/2 final stage | Independiente | Sao Paulo | 1972-05-04 | 2 - 0 |
| group stage | Cerro Porteno | Olimpia Asuncion | 1972-03-09 | 1 - 3 |
| group stage | Valencia FC (ven) | Peñarol | 1972-02-27 | 1 - 2 |
| group stage | Valencia FC (ven) | Deportivo Italia | 1972-02-13 | 1 - 1 |
| Copa Libertadores 1971 | ||||
| 1/2 final stage | Universitario | Palmeiras | 1971-04-14 | 1 - 2 |
| group stage | Sporting Cristal | Boca Juniors | 1971-03-01 | 2 - 0 |
| group stage | Deportivo Italia | Palmeiras | 1971-02-10 | 0 - 3 |
| Copa Libertadores 1970 | ||||
| 1/4 finals play-off | Universidad de Chile | Nacional (UR) | 1970-04-28 | 2 - 1 |
| group stage | Boca Juniors | Universitario La Paz | 1970-03-07 | 4 - 0 |
| group stage | Deportivo Galicia | Peñarol | 1970-02-27 | 0 - 1 |
| group stage | América de Quito | Universitario | 1970-02-22 | 0 - 3 |
| WC 1970 qualifiers - S. America | ||||
| Peru | Bolivia | 1969-08-17 | 3 - 0 | |
| Chile | Ecuador | 1969-07-27 | 4 - 1 | |
| Copa Libertadores 1969 | ||||
| 1/2 finals | Universidad Católica | Estudiantes | 1969-05-01 | 1 - 3 |
| group stage | Union Magdalena | Deportivo Cali | 1969-02-23 | 2 - 2 |
| Olympic Games 1968 | ||||
| 1st stage | Bulgaria OT | Thailand OT | 1968-10-14 | 7 - 0 |
| Copa Libertadores 1968 | ||||
| group stage | El Nacional | Universidad de Chile | 1968-02-18 | 3 - 1 |
| group stage | El Nacional | Universidad Católica | 1968-02-11 | 2 - 1 |
| Copa Libertadores 1967 | ||||
| group stage | Santa Fe | BolÃvar | 1967-05-10 | 1 - 2 |
| group stage | Ind. Medellin | BolÃvar | 1967-05-07 | 2 - 0 |
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