| International du Portugal | 2024/03/08 12:40 | Sacha Leveque v Koenig, Joel | L | 2-0 |
| Open de Suède | 2024/01/19 08:20 | Koenig, Joel v Jia Wei Joel Koh | L | 0-2 |
| 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 |
| International d'Islande | 2024/01/28 13:00 | Muh Azahbru Kasra v Mads Juel Moller | W | 1-2 |
| International d'Islande | 2024/01/28 12:40 | Mathias Solgaard v Mads Juel Moller | W | 0-2 |
| International d'Islande | 2024/01/27 17:20 | Salomon Adam Thomasen v Mads Juel Moller | W | 0-2 |
| International d'Islande | 2024/01/27 10:45 | Kjell Wagener v Mads Juel Moller | W | 0-2 |
| International d'Islande | 2024/01/26 14:15 | Jonathan McDonald v Mads Juel Moller | W | 0-2 |
| Estonie Int. - | 2024/01/13 08:20 | Mads Juel Moller v Danylo Bosniuk | L | 0-2 |
| Estonie Int. - | 2024/01/12 14:00 | Mads Juel Moller v Jia Wei Joel Koh | D | 1-1 |
| Estonie Int. - | 2024/01/12 09:55 | Mads Juel Moller v Manraj Singh | W | 2-1 |