| DFB-Pokal 2021/2022 - Appearances as Referee |  |
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| 08/08/2021 | SV 07 Elversberg | - | 1. FSV Mainz 05 | 7:8 pso | 4 | - | - |
| DFB-Pokal 2021/2022 - Appearances as Referee | |
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| 08/08/2021 | SV 07 Elversberg | - | 1. FSV Mainz 05 | 7:8 pso | 4 | - | - |
| Complete name: | Thorben Siewer |
| Born: | 05/07/1987 |
| Place of birth: |
Germany |
| Residence: | Drolshagen |
| Nationality: |
Germany |
| Profession: | Controller |
| Club: | FC Schreibershof |