Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2023/12/19 09:30 | Akito Itagaki v Dennis Klein | L | 0-3 |
| Challenger Series TT | 2023/11/13 12:50 | Dennis Klein 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 | 2023/07/03 09:50 | Dennis Klein v Akito Itagaki | L | 3-0 |
| Challenger Series TT | 2023/06/19 17:50 | Dennis Klein v Akito Itagaki | L | 3-0 |
| Challenger Series TT | 2023/05/04 19:50 | Dennis Klein v Akito Itagaki | L | 3-1 |
| Challenger Series TT | 2024/02/26 17:30 | Akito Itagaki v Liang Qiu | L | 2-3 |
| Challenger Series TT | 2024/02/26 12:50 | Akito Itagaki v Samuel Amann | L | 2-3 |
| Challenger Series TT | 2024/02/26 10:10 | Akito Itagaki v Alexander Valuch | L | 0-3 |
| Challenger Series TT | 2024/02/26 07:30 | Akito Itagaki v Haruki Harada | L | 0-3 |
| Challenger Series TT | 2024/02/23 10:10 | Akito Itagaki v Daniel Rinderer | L | 1-3 |
| Challenger Series TT | 2024/02/22 20:50 | Akito Itagaki v Benjamin Fruchart | L | 0-3 |
| Challenger Series TT | 2024/02/22 18:10 | Akito Itagaki v Rodrigo Hidalgo | L | 0-3 |
| Challenger Series TT | 2024/02/22 15:30 | Alexander Valuch v Akito Itagaki | L | 3-2 |
| Challenger Series TT | 2024/02/26 16:50 | Dennis Klein v Mohammed Javad Sohrabi | W | 3-0 |
| Challenger Series TT | 2024/02/26 14:10 | Dennis Klein v Sven Happek | W | 3-0 |
| Challenger Series TT | 2024/02/26 12:10 | Dennis Klein v Haruki Harada | L | 2-3 |
| Challenger Series TT | 2024/02/26 09:30 | Liang Qiu v Dennis Klein | W | 2-3 |
| Challenger Series TT | 2024/01/30 14:30 | Alberto Lillo v Dennis Klein | W | 0-3 |
| Challenger Series TT | 2024/01/30 13:05 | Dennis Klein v Marius Henninger | W | 3-0 |
| Challenger Series TT | 2024/01/30 10:50 | Adrien Coton v Dennis Klein | W | 0-3 |
| Challenger Series TT | 2024/01/30 09:30 | Dennis Klein v Benjamin Fruchart | L | 2-3 |