| Youth Youth League 2017/2018 - Appearances as Referee |  |
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 |
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| 31/10/2017 | Atlético Madrid | - | Qarabağ FK | 0:1 | 5 | - | - |
| Youth Youth League 2017/2018 - Appearances as Referee | |
|
|
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| 31/10/2017 | Atlético Madrid | - | Qarabağ FK | 0:1 | 5 | - | - |
| Complete name: | Stephan Klossner |
| Born: | 30/05/1981 |
| Place of birth: |
Switzerland |
| Nationality: |
Switzerland |