| Europa League 1969/1970 - Appearances as Referee |  |
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 |
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| 16/09/1969 | FC Zürich | - | Kilmarnock FC | 3:2 | - | - | - |
| 26/11/1969 | Newcastle United | - | FC Porto | 1:0 | - | - | - |
| Europa League 1969/1970 - Appearances as Referee | |
|
|
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| 16/09/1969 | FC Zürich | - | Kilmarnock FC | 3:2 | - | - | - |
| 26/11/1969 | Newcastle United | - | FC Porto | 1:0 | - | - | - |
| Complete name: | Wolfgang Riedel |
| Born: | 19/12/1928 † 12/11/2007 |
| Place of birth: |
Falkensee, 
Germany |
| Nationality: |
Germany |