| Bundesliga 1988/1989 - Appearances as Referee |  |
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| 19/11/1988 | 1. FC Kaiserslautern | - | Hamburger SV | 0:0 | 2 | - | - |
| 25/03/1989 | Bayern München | - | Bayer Leverkusen | 2:0 | - | - | - |
| Bundesliga 1988/1989 - Appearances as Referee | |
|
|
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| 19/11/1988 | 1. FC Kaiserslautern | - | Hamburger SV | 0:0 | 2 | - | - |
| 25/03/1989 | Bayern München | - | Bayer Leverkusen | 2:0 | - | - | - |
| Complete name: | Serge Muhmenthaler |
| Born: | 20/05/1953 |
| Place of birth: |
Grenchen, 
Switzerland |
| Nationality: |
Switzerland |
| Bundesliga (GER) appearances: | 4 |