| Europa League 1967/1968 - Appearances as Referee |  |
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| 28/02/1968 | FC Zürich | - | Sporting CP | 3:0 | - | - | - |
| Europa League 1967/1968 - Appearances as Referee | |
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| 28/02/1968 | FC Zürich | - | Sporting CP | 3:0 | - | - | - |
| Complete name: | Wolfgang Riedel |
| Born: | 19/12/1928 † 12/11/2007 |
| Place of birth: |
Falkensee, 
Germany |
| Nationality: |
Germany |