| Champions League 2023/2024 - Appearances as Assistant | ||||
| 08/11/2023 | PSV Eindhoven | - | RC Lens | 1:0 |
| Champions League 2023/2024 - Appearances as Assistant | ||||
| 08/11/2023 | PSV Eindhoven | - | RC Lens | 1:0 |
| Complete name: | Lasse Koslowski |
| Born: | 14/07/1987 |
| Place of birth: |
Berlin, 
Germany |
| Residence: | Berlin |
| Nationality: |
Germany |
| Profession: | selbständig |
| Club: | Frohnauer SC |