Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2023/07/04 08:30 | Akito Itagaki v Daniel Rinderer | W | 2-3 |
| Challenger Series TT | 2023/07/18 08:30 | Armin Alicic v Daniel Rinderer | L | 3-2 |
| Challenger Series TT | 2023/07/18 07:10 | Antonin Gavlas v Daniel Rinderer | L | 3-0 |
| Challenger Series TT | 2023/07/17 17:10 | Dauud Cheaib v Daniel Rinderer | L | 3-1 |
| Challenger Series TT | 2023/07/17 15:10 | Amirreza Abbasi v Daniel Rinderer | L | 3-0 |
| Challenger Series TT | 2023/07/17 12:30 | Michael Engelhardt v Daniel Rinderer | W | 2-3 |
| Challenger Series TT | 2023/07/17 11:10 | Miroslav Horejsi v Daniel Rinderer | L | 3-1 |
| Challenger Series TT | 2023/07/17 06:30 | Hannes Hormann v Daniel Rinderer | W | 0-3 |
| Challenger Series TT | 2023/07/04 08:30 | Akito Itagaki v Daniel Rinderer | W | 2-3 |
| Challenger Series TT | 2023/07/04 09:50 | Kirill Fadeev v Akito Itagaki | L | 3-0 |
| Challenger Series TT | 2023/07/04 08:30 | Akito Itagaki v Daniel Rinderer | L | 2-3 |
| Challenger Series TT | 2023/07/03 18:30 | David Reitspies v Akito Itagaki | L | 3-2 |
| Challenger Series TT | 2023/07/03 15:50 | Benjamin Fruchart v Akito Itagaki | L | 3-1 |
| Challenger Series TT | 2023/07/03 13:50 | Mathias Golab v Akito Itagaki | W | 1-3 |
| Challenger Series TT | 2023/07/03 09:50 | Dennis Klein v Akito Itagaki | L | 3-0 |
| Challenger Series TT | 2023/07/03 07:10 | Tobias Slanina v Akito Itagaki | L | 3-0 |
| Challenger Series TT | 2023/06/20 07:50 | Sven Happek v Akito Itagaki | L | 3-0 |