| World Cup 1986 Mexico - Appearances as Referee |  |
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| 04/06/1986 | Italy | - | Argentina | 1:1 | 3 | - | - |
| 17/06/1986 | Denmark | - | Spain | 1:5 | 4 | - | - |
| World Cup 1986 Mexico - Appearances as Referee | |
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|
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| 04/06/1986 | Italy | - | Argentina | 1:1 | 3 | - | - |
| 17/06/1986 | Denmark | - | Spain | 1:5 | 4 | - | - |
| Complete name: | Johannes Nicolaus Ignacius Keizer |
| Born: | 06/10/1940 † 18/11/2024 |
| Place of birth: |
Volendam, 
Netherlands |
| Nationality: |
Netherlands |