| DFB-Pokal 2020/2021 - Appearances as Assistant | ||||
| 13/09/2020 | Eintracht Norderstedt | - | Bayer Leverkusen | 0:7 |
| 22/12/2020 | 1899 Hoffenheim | - | SpVgg Greuther Fürth | 6:7 pso |
| DFB-Pokal 2020/2021 - Appearances as Assistant | ||||
| 13/09/2020 | Eintracht Norderstedt | - | Bayer Leverkusen | 0:7 |
| 22/12/2020 | 1899 Hoffenheim | - | SpVgg Greuther Fürth | 6:7 pso |
| Complete name: | Thorben Siewer |
| Born: | 05/07/1987 |
| Place of birth: |
Germany |
| Residence: | Drolshagen |
| Nationality: |
Germany |
| Profession: | Controller |
| Club: | FC Schreibershof |