| Europa League 1991/1992 - Appearances as Referee |  |
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| 05/11/1991 | Trabzonspor | - | Olympique Lyon | 4:1 | - | - | - |
| 10/12/1991 | Dinamo Moskva | - | KAA Gent | 0:0 | - | - | 2 |
| Europa League 1991/1992 - Appearances as Referee | |
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| 05/11/1991 | Trabzonspor | - | Olympique Lyon | 4:1 | - | - | - |
| 10/12/1991 | Dinamo Moskva | - | KAA Gent | 0:0 | - | - | 2 |
| Complete name: | Karl-Josef Assenmacher |
| Born: | 30/05/1947 |
| Place of birth: |
Germany |
| Residence: | Fischenich |
| Nationality: |
Germany |
| Bundesliga (GER) appearances: | 153 |