| Champions League 1981/1982 - Appearances as Referee |  |
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 |
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| 30/09/1981 | Glentoran FC | - | Progrès Niedercorn | 4:0 | 2 | - | - |
| 04/11/1981 | Aston Villa | - | BFC Dynamo | 0:1 | 1 | - | - |
| Champions League 1981/1982 - Appearances as Referee | |
|
|
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| 30/09/1981 | Glentoran FC | - | Progrès Niedercorn | 4:0 | 2 | - | - |
| 04/11/1981 | Aston Villa | - | BFC Dynamo | 0:1 | 1 | - | - |
| Complete name: | Johannes Nicolaus Ignacius Keizer |
| Born: | 06/10/1940 † 18/11/2024 |
| Place of birth: |
Volendam, 
Netherlands |
| Nationality: |
Netherlands |