| Bundesliga 1990/1991 Upper Play-Off - Appearances as Referee |  |
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 |
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| 07/06/1991 | Donawitzer SV Alpine | - | Rapid Wien | 2:0 | 1 | - | 1 |
| Bundesliga 1990/1991 Upper Play-Off - Appearances as Referee | |
|
|
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| 07/06/1991 | Donawitzer SV Alpine | - | Rapid Wien | 2:0 | 1 | - | 1 |
| Complete name: | Udo Kratzer |
| Born: | 12/02/1945 |
| Place of birth: |
Austria |
| Nationality: |
Austria |