| Welsh Int. | 2023/11/30 09:00 | Lucas Claerbout v Koenig, Joel | L | 2-0 |
| Irish Open | 2023/11/16 12:00 | Samuel Hsiao v Koenig, Joel | L | 2-0 |
| Hungarian Int. | 2023/11/03 09:40 | Koenig, Joel v Heino, Iikka | L | 0-2 |
| Hungarian Int. | 2023/11/02 12:45 | Koenig, Joel v Bruno Carvalho | W | 2-0 |
| Dutch Open | 2023/10/12 14:00 | Koenig, Joel v Christensen, Jeppe Bruun | L | 0-2 |
| Nouvelle Aquitane Future Series | 2023/07/08 00:50 | Bruno Carvalho v Koenig, Joel | L | 2-1 |
| Nouvelle Aquitane Future Series | 2023/07/07 14:00 | Neil Bhabuta v Koenig, Joel | W | 0-2 |
| Nouvelle Aquitane Future Series | 2023/07/07 08:20 | Paul Tournefier v Koenig, Joel | W | 0-2 |
| Estonie Int. - | 2024/01/12 09:00 | Brian Holtschke v Fabian Roth | W | 1-2 |
| Welsh Int. | 2023/12/01 17:40 | Fabian Roth v Ade Resky Dwicahyo | L | 0-2 |
| Welsh Int. | 2023/12/01 10:00 | Yanis Gaudin v Fabian Roth | W | 0-2 |
| Welsh Int. | 2023/11/30 09:40 | Kim Kristensen, D. v Fabian Roth | W | 0-2 |
| Irish Open | 2023/11/17 10:20 | Fabian Roth v Mark Caljouw | L | 0-2 |
| Irish Open | 2023/11/16 20:20 | Samuel Hsiao v Fabian Roth | W | 1-2 |
| Irish Open | 2023/11/16 12:20 | Mathias Solgaard v Fabian Roth | W | 1-2 |
| Hylo Open | 2023/11/01 15:40 | Tien Chen Chou v Fabian Roth | L | 2-0 |