| Champions League 1982/1983 - Appearances as Referee |  |
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 |
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| 15/09/1982 | BFC Dynamo | - | Hamburger SV | 1:1 | - | - | - |
| 03/11/1982 | Sporting CP | - | CSKA Sofia | 0:0 | 1 | - | - |
| 16/03/1983 | Juventus | - | Aston Villa | 3:1 | - | - | - |
| Champions League 1982/1983 - Appearances as Referee | |
|
|
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| 15/09/1982 | BFC Dynamo | - | Hamburger SV | 1:1 | - | - | - |
| 03/11/1982 | Sporting CP | - | CSKA Sofia | 0:0 | 1 | - | - |
| 16/03/1983 | Juventus | - | Aston Villa | 3:1 | - | - | - |
| Complete name: | Johannes Nicolaus Ignacius Keizer |
| Born: | 06/10/1940 † 18/11/2024 |
| Place of birth: |
Volendam, 
Netherlands |
| Nationality: |
Netherlands |