| Bundesliga 1989/1990 - Appearances as Referee |  |
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| 04/11/1989 | Bayer 05 Uerdingen | - | 1. FC Nürnberg | 3:3 | 4 | - | - |
| 16/03/1990 | Werder Bremen | - | 1. FC Köln | 4:0 | 3 | - | - |
| Bundesliga 1989/1990 - Appearances as Referee | |
|
|
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| 04/11/1989 | Bayer 05 Uerdingen | - | 1. FC Nürnberg | 3:3 | 4 | - | - |
| 16/03/1990 | Werder Bremen | - | 1. FC Köln | 4:0 | 3 | - | - |
| Complete name: | Serge Muhmenthaler |
| Born: | 20/05/1953 |
| Place of birth: |
Grenchen, 
Switzerland |
| Nationality: |
Switzerland |
| Bundesliga (GER) appearances: | 4 |