| Europa League 1989/1990 - Appearances as Referee |  |
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| 17/10/1989 | Paris Saint-Germain | - | Juventus | 0:1 | - | - | - |
| 21/11/1989 | Olympiakos Piraeus | - | AJ Auxerre | 1:1 | - | - | - |
| Europa League 1989/1990 - Appearances as Referee | |
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| 17/10/1989 | Paris Saint-Germain | - | Juventus | 0:1 | - | - | - |
| 21/11/1989 | Olympiakos Piraeus | - | AJ Auxerre | 1:1 | - | - | - |
| Complete name: | John Blankenstein |
| Born: | 12/02/1949 † 25/08/2006 |
| Place of birth: |
Den Haag, 
Netherlands |
| Nationality: |
Netherlands |