| KL Masters | 2023/11/02 05:45 | Jason Gunawan v Jia Wei Joel Koh | L | 2-0 |
| KL Masters | 2023/11/01 05:15 | Faiz Rozain v Jia Wei Joel Koh | W | 1-2 |
| Vietnam Open | 2023/09/13 13:20 | Jia Heng Jason Teh v Jia Wei Joel Koh | L | 2-0 |
| Indonesia Masters | 2023/09/06 08:25 | Kiran George v Jia Wei Joel Koh | L | 2-0 |
| Sørøstasiatiske leker | 2023/05/13 05:30 | Jia Wei Joel Koh v Jun Hao Leong | L | 0-2 |
| Thailand Masters - Kval | 2023/01/31 04:00 | Jia Wei Joel Koh v Hyeok Jin Jeon | L | 0-2 |
| Estonian Int. | 2023/01/13 17:30 | Yu Kai Huang v Jia Wei Joel Koh | L | 2-0 |
| Estonian Int. | 2023/01/13 10:20 | Jia Wei Joel Koh v Kai Schaefer | W | 2-1 |
| Norwegian Int. | 2023/11/10 10:20 | Markus Barth v Mikolaj Szymanowski | L | 0-2 |
| Hylo Open Qual | 2023/10/31 08:30 | Markus Barth v Luka Wraber | L | 0-2 |
| Abu Dhabi Masters | 2023/10/18 06:00 | Korakrit Laotrakul v Markus Barth | L | 2-0 |
| Dutch Open | 2023/10/12 15:20 | Markus Barth v Mads Juel Moller | L | 0-2 |
| Scottish Open | 2023/10/06 11:20 | Samuel O'Brien Ricketts v Markus Barth | L | 2-1 |
| Cameroon Int. | 2023/08/27 11:00 | Somi Romdhani v Markus Barth | W | 1-2 |
| European Games | 2023/06/29 10:00 | Julien Carraggi v Markus Barth | L | 2-1 |
| Denmark Masters | 2023/06/09 13:00 | Alwi Farhan v Markus Barth | L | 2-0 |