| U20 World Cup 1983 in Mexiko - Appearances as Referee |  |
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| 04/06/1983 | Uruguay | - | USA | 3:2 | 1 | - | - |
| U20 World Cup 1983 in Mexiko - Appearances as Referee | |
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| 04/06/1983 | Uruguay | - | USA | 3:2 | 1 | - | - |
| Complete name: | Ivan Grégr |
| Born: | 21/05/1942 |
| Place of birth: |
Praha, 
CSSR |
| Residence: | Praha |
| Nationality: |
Czech Republic |
| Profession: | Mechaniker |
| Club: | Karriereende |