| Youth Youth League 2019/2020 - Appearances as Referee |  |
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 |
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| 18/09/2019 | Paris Saint-Germain | - | Real Madrid | 1:2 | 5 | - | - |
| 06/11/2019 | Real Madrid | - | Galatasaray | 2:4 | 4 | 1 | - |
| Youth Youth League 2019/2020 - Appearances as Referee | |
|
|
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| 18/09/2019 | Paris Saint-Germain | - | Real Madrid | 1:2 | 5 | - | - |
| 06/11/2019 | Real Madrid | - | Galatasaray | 2:4 | 4 | 1 | - |
| Complete name: | Stephan Klossner |
| Born: | 30/05/1981 |
| Place of birth: |
Switzerland |
| Nationality: |
Switzerland |