| Europa Conference League 2023/2024 - Appearances as Assistant | ||||
| 26/10/2023 | AZ Alkmaar | - | Aston Villa | 1:4 |
| 30/11/2023 | Olimpija Ljubljana | - | Lille OSC | 0:2 |
| Europa Conference League 2023/2024 - Appearances as Assistant | ||||
| 26/10/2023 | AZ Alkmaar | - | Aston Villa | 1:4 |
| 30/11/2023 | Olimpija Ljubljana | - | Lille OSC | 0:2 |
| Complete name: | Lasse Koslowski |
| Born: | 14/07/1987 |
| Place of birth: |
Berlin, 
Germany |
| Residence: | Berlin |
| Nationality: |
Germany |
| Profession: | selbständig |
| Club: | Frohnauer SC |