Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2023/10/16 11:50 | Dennis Klein v Akito Itagaki | W | 3-0 |
| Challenger Series TT | 2023/07/03 09:50 | Dennis Klein v Akito Itagaki | W | 3-0 |
| Challenger Series TT | 2023/06/19 17:50 | Dennis Klein v Akito Itagaki | W | 3-0 |
| Challenger Series TT | 2023/05/04 19:50 | Dennis Klein v Akito Itagaki | W | 3-1 |
| Challenger Series TT | 2023/11/13 10:10 | Dennis Klein v Alexander Valuch | W | 3-0 |
| Challenger Series TT | 2023/11/13 07:30 | Dennis Klein v Sven Happek | W | 3-0 |
| Challenger Series TT | 2023/10/17 12:50 | Simon Berglund v Dennis Klein | W | 2-3 |
| Challenger Series TT | 2023/10/17 11:25 | Dauud Cheaib v Dennis Klein | W | 2-3 |
| Challenger Series TT | 2023/10/17 09:10 | Dennis Klein v Simon Berglund | L | 0-3 |
| Challenger Series TT | 2023/10/17 06:30 | Dennis Klein v Jong-Eon Yeon | W | 3-0 |
| Challenger Series TT | 2023/10/16 17:50 | Dennis Klein v Stephane Ouaiche | L | 1-3 |
| Challenger Series TT | 2023/10/16 16:30 | Dennis Klein v Carlos Caballero | W | 3-1 |
| Challenger Series TT | 2023/11/13 10:50 | Liang Qiu v Akito Itagaki | L | 3-0 |
| Challenger Series TT | 2023/11/13 08:50 | Akito Itagaki v Martin Baechler | L | 2-3 |
| Challenger Series TT | 2023/10/17 08:30 | Akito Itagaki v Carlos Caballero | L | 0-3 |
| Challenger Series TT | 2023/10/16 19:50 | Akito Itagaki v Stephane Ouaiche | L | 2-3 |
| Challenger Series TT | 2023/10/16 17:10 | Akito Itagaki v Kirill Fadeev | L | 0-3 |
| Challenger Series TT | 2023/10/16 14:30 | Dauud Cheaib v Akito Itagaki | L | 3-1 |
| Challenger Series TT | 2023/10/16 11:50 | Dennis Klein v Akito Itagaki | L | 3-0 |
| Challenger Series TT | 2023/10/16 09:50 | Akito Itagaki v Simon Berglund | L | 0-3 |