| Super League 1988/1989 Abstieg Gruppe A - Appearances as Referee |  |
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| 29/04/1989 | FC Zürich | - | FC St. Gallen | 2:3 | 6 | 1 | - |
| Super League 1988/1989 Abstieg Gruppe A - Appearances as Referee | |
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| 29/04/1989 | FC Zürich | - | FC St. Gallen | 2:3 | 6 | 1 | - |
| Complete name: | Serge Muhmenthaler |
| Born: | 20/05/1953 |
| Place of birth: |
Grenchen, 
Switzerland |
| Nationality: |
Switzerland |
| Bundesliga (GER) appearances: | 4 |