Stadium: Ochsenhausen, Germany
| Challenger Series TT | 2023/06/20 07:50 | Sven Happek v Akito Itagaki | W | 3-0 |
| Challenger Series TT | 2023/10/05 12:30 | Sven Happek v Hannes Hormann | W | 3-1 |
| Challenger Series TT | 2023/10/05 09:10 | Daniel Rinderer v Sven Happek | L | 3-1 |
| Challenger Series TT | 2023/10/05 07:10 | Sven Happek v Alexander Valuch | L | 0-3 |
| Challenger Series TT | 2023/09/19 09:50 | Sven Happek v Alvaro Gainza | L | 1-3 |
| Challenger Series TT | 2023/09/19 06:30 | Sven Happek v Jong-Eon Yeon | L | 2-3 |
| Challenger Series TT | 2023/09/18 17:50 | Sven Happek v Sudhanshu Grover | L | 1-3 |
| Challenger Series TT | 2023/09/18 16:30 | Sven Happek v Louis Reuseau | W | 3-2 |
| Challenger Series TT | 2023/09/18 11:50 | Sven Happek v Louis Price | L | 0-3 |
| 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 |
| Challenger Series TT | 2023/10/05 07:50 | Akito Itagaki v Guillaume Alcayde | L | 1-3 |
| Challenger Series TT | 2023/10/03 10:30 | Akito Itagaki v Sudhanshu Grover | L | 1-3 |
| Challenger Series TT | 2023/10/03 07:50 | Akito Itagaki v Akos Kishegyi | L | 2-3 |
| Challenger Series TT | 2023/10/02 19:10 | Akito Itagaki v Louis Price | L | 0-3 |
| Challenger Series TT | 2023/10/02 14:30 | Akito Itagaki v Sushmit Sriram | L | 1-3 |
| Challenger Series TT | 2023/10/02 12:30 | Akito Itagaki v Dauud Cheaib | L | 0-3 |