Stadium: Ochsenhausen, Germany
| 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 | 2023/10/16 09:10 | Dennis Klein v Dauud Cheaib | L | 2-3 |
| Challenger Series TT | 2023/10/16 06:30 | Dennis Klein v Kirill Fadeev | W | 3-0 |
| Challenger Series TT | 2023/09/08 12:50 | Dennis Klein v Dauud Cheaib | W | 3-0 |
| Challenger Series TT | 2023/09/08 11:25 | Dennis Klein v Rafael Turrini | L | 2-3 |
| Challenger Series TT | 2023/09/08 09:50 | Dennis Klein v Miguel Nunez | W | 3-0 |
| Challenger Series TT | 2023/09/08 06:30 | Dennis Klein v Corentin Mazaud | W | 3-1 |
| Challenger Series TT | 2023/09/07 17:50 | Dennis Klein v Oliver Both | W | 3-0 |
| Challenger Series TT | 2023/09/07 16:30 | Dennis Klein v Dauud Cheaib | W | 3-1 |
| Challenger Series TT | 2023/10/16 09:50 | Akito Itagaki v Simon Berglund | L | 0-3 |
| Challenger Series TT | 2023/10/16 07:50 | Akito Itagaki v Jong-Eon Yeon | W | 3-2 |
| Challenger Series TT | 2023/10/06 09:10 | Akito Itagaki v Sushmit Sriram | L | 0-3 |
| Challenger Series TT | 2023/10/05 19:50 | Akito Itagaki v Miguel Nunez | L | 0-3 |
| Challenger Series TT | 2023/10/05 17:10 | Akito Itagaki v Hannes Hormann | W | 3-1 |
| Challenger Series TT | 2023/10/05 14:30 | Sven Happek v Akito Itagaki | W | 2-3 |
| Challenger Series TT | 2023/10/05 11:50 | Daniel Rinderer v Akito Itagaki | L | 3-1 |
| Challenger Series TT | 2023/10/05 09:50 | Akito Itagaki v Alexander Valuch | L | 0-3 |