| Open de Suède | 2024/01/19 08:20 | Joel Koenig v Jia Wei Joel Koh | L | 0-2 |
| Welsh Int. | 2023/11/30 09:00 | Lucas Claerbout v Joel Koenig | L | 2-0 |
| Irish Open | 2023/11/16 12:00 | Samuel Hsiao v Joel Koenig | L | 2-0 |
| Hungarian Int. | 2023/11/03 09:40 | Joel Koenig v Heino, Iikka | L | 0-2 |
| Hungarian Int. | 2023/11/02 12:45 | Joel Koenig v Bruno Carvalho | W | 2-0 |
| Dutch Open | 2023/10/12 14:00 | Joel Koenig v Christensen, Jeppe Bruun | L | 0-2 |
| Nouvelle Aquitane Future Series | 2023/07/08 00:50 | Bruno Carvalho v Joel Koenig | L | 2-1 |
| Nouvelle Aquitane Future Series | 2023/07/07 14:00 | Neil Bhabuta v Joel Koenig | W | 0-2 |