| Europa League 1972/1973 - Appearances as Referee |  |
 |
 |
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| 27/09/1972 | Fenerbahçe | - | Ruch Chorzów | 1:0 | - | - | - |
| 13/12/1972 | PFC Beroe | - | OFK Beograd | 1:3 | 4 | - | - |
| Europa League 1972/1973 - Appearances as Referee | |
|
|
||||
| 27/09/1972 | Fenerbahçe | - | Ruch Chorzów | 1:0 | - | - | - |
| 13/12/1972 | PFC Beroe | - | OFK Beograd | 1:3 | 4 | - | - |
| Complete name: | Wolfgang Riedel |
| Born: | 19/12/1928 † 12/11/2007 |
| Place of birth: |
Falkensee, 
Germany |
| Nationality: |
Germany |