Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2022/10/10 07:10 | Karl Zimmermann v Kirill Fadeev | W | 2-3 |
| Challenger Series TT | 2023/03/09 07:30 | Kirill Fadeev v Samuel Amann | W | 3-1 |
| Challenger Series TT | 2023/02/07 10:10 | Kirill Fadeev v Arman Hajiei | W | 3-2 |
| Challenger Series TT | 2023/02/07 07:30 | Kirill Fadeev v Sourav Saha | L | 2-3 |
| Challenger Series TT | 2023/02/06 18:50 | Kirill Fadeev v Bastien Dupont | W | 3-1 |
| Challenger Series TT | 2023/02/06 17:30 | Kirill Fadeev v David Reitspies | L | 1-3 |
| Challenger Series TT | 2023/02/06 12:50 | Kirill Fadeev v Siddharta Almeida | W | 3-0 |
| Challenger Series TT | 2023/02/06 10:10 | Kirill Fadeev v Dauud Cheaib | L | 0-3 |
| Challenger Series TT | 2023/02/06 07:30 | Kirill Fadeev v Dennis Klein | W | 3-1 |
| Challenger Series TT | 2023/03/09 08:10 | Karl Zimmermann v Dimitrije Levajac | L | 0-3 |
| Challenger Series TT | 2022/12/13 09:30 | Kenan Hrnic v Karl Zimmermann | W | 1-3 |
| Challenger Series TT | 2022/12/13 08:10 | Sven Happek v Karl Zimmermann | W | 1-3 |
| Challenger Series TT | 2022/12/12 18:10 | Nikola Grujic v Karl Zimmermann | W | 1-3 |
| Challenger Series TT | 2022/12/12 16:10 | Marius Henninger v Karl Zimmermann | L | 3-2 |
| Challenger Series TT | 2022/12/12 13:30 | Jeromy Loffler v Karl Zimmermann | L | 3-1 |
| Challenger Series TT | 2022/12/12 12:10 | Anton Limonov v Karl Zimmermann | L | 3-0 |
| Challenger Series TT | 2022/12/12 07:30 | Makoto Nogami v Karl Zimmermann | L | 3-2 |