Stadium: Ochsenhausen, Germany
| 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 | 2023/11/13 15:30 | Akito Itagaki v Alexander Valuch | L | 0-3 |
| Challenger Series TT | 2023/11/13 12:50 | Dennis Klein v Akito Itagaki | L | 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 | 2023/11/13 16:10 | Martin Baechler v Sven Happek | L | 3-0 |
| Challenger Series TT | 2023/11/13 13:30 | Alexander Valuch v Sven Happek | L | 3-1 |
| Challenger Series TT | 2023/11/13 12:10 | Dauud Cheaib v Sven Happek | L | 3-1 |
| Challenger Series TT | 2023/11/13 07:30 | Dennis Klein v Sven Happek | L | 3-0 |
| Challenger Series TT | 2023/10/10 09:10 | Sven Happek v Armin Alicic | L | 0-3 |
| Challenger Series TT | 2023/10/09 19:50 | Sven Happek v Admir Duranspahic | L | 0-3 |
| Challenger Series TT | 2023/10/09 17:10 | Sven Happek v Dauud Cheaib | L | 0-3 |
| Challenger Series TT | 2023/10/09 14:30 | Mike Hollo v Sven Happek | L | 3-1 |