| Europa League 1987/1988 - Appearances as Referee |  |
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| 30/09/1987 | TJ Bohemians ČKD Praha | - | KSK Beveren | 1:0 | - | - | - |
| 21/10/1987 | GD Chaves | - | Budapest Honved SE | 1:2 | - | - | - |
| Europa League 1987/1988 - Appearances as Referee | |
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| 30/09/1987 | TJ Bohemians ČKD Praha | - | KSK Beveren | 1:0 | - | - | - |
| 21/10/1987 | GD Chaves | - | Budapest Honved SE | 1:2 | - | - | - |
| Complete name: | Karl-Josef Assenmacher |
| Born: | 30/05/1947 |
| Place of birth: |
Germany |
| Residence: | Fischenich |
| Nationality: |
Germany |
| Bundesliga (GER) appearances: | 153 |