| Europa League 1969/1970 - Appearances as Referee |  |
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| 01/10/1969 | TJ Sparta ČKD Praha | - | Inter | 0:1 | - | - | - |
| Europa League 1969/1970 - Appearances as Referee | |
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| 01/10/1969 | TJ Sparta ČKD Praha | - | Inter | 0:1 | - | - | - |
| Complete name: | Eugen Boller |
| Born: | |
| Place of birth: |
Switzerland |
| Residence: | Reinach |
| Nationality: |
Switzerland |