| Europa League 1973/1974 - Appearances as Referee |  |
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| 19/09/1973 | Standard Liège | - | Ards FC | 6:1 | 3 | - | - |
| Europa League 1973/1974 - Appearances as Referee | |
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| 19/09/1973 | Standard Liège | - | Ards FC | 6:1 | 3 | - | - |
| Complete name: | Wolfgang Riedel |
| Born: | 19/12/1928 † 12/11/2007 |
| Place of birth: |
Falkensee, 
Germany |
| Nationality: |
Germany |