Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2023/11/13 18:10 | Akito Itagaki v Sven Happek | W | 3-2 |
| Challenger Series TT | 2023/10/05 14:30 | Sven Happek v Akito Itagaki | W | 2-3 |
| Challenger Series TT | 2023/06/20 07:50 | Sven Happek v Akito Itagaki | L | 3-0 |
| Challenger Series TT | 2024/02/26 18:50 | Akito Itagaki v Dennis Klein | W | 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 | 2024/02/26 19:30 | Sven Happek v Mohammed Javad Sohrabi | L | 0-3 |
| Challenger Series TT | 2024/02/26 16:10 | Sven Happek v Haruki Harada | L | 1-3 |
| Challenger Series TT | 2024/02/26 14:10 | Dennis Klein v Sven Happek | L | 3-0 |
| Challenger Series TT | 2024/02/26 11:30 | Liang Qiu v Sven Happek | L | 3-0 |
| Challenger Series TT | 2024/02/26 08:50 | Samuel Amann v Sven Happek | W | 1-3 |
| Challenger Series TT | 2024/02/06 13:50 | Sven Happek v Dauud Cheaib | L | 1-3 |
| Challenger Series TT | 2024/02/06 12:25 | Rafael Turrini v Sven Happek | L | 3-1 |
| Challenger Series TT | 2024/02/06 11:30 | Sven Happek v Aljaz Godec | W | 3-2 |