| Abu Dhabi Masters | 2023/10/18 13:05 | Duc Phat Le v Kai Schaefer | L | 2-1 |
| Abu Dhabi Masters | 2023/10/18 06:00 | Aashinsa Herath v Kai Schaefer | W | 0-2 |
| Dutch Open | 2023/10/13 12:30 | Kai Schaefer v Karan Rajan Rajarajan | L | 1-2 |
| Dutch Open | 2023/10/12 10:20 | Kai Schaefer v Gregoire Deschamp | W | 2-1 |
| Scottish Open | 2023/10/06 14:40 | Collins Valentine Filimon v Kai Schaefer | L | 2-1 |
| Scottish Open | 2023/10/06 09:20 | Bernardo Atilano v Kai Schaefer | W | 0-2 |
| Belgian Int. | 2023/09/14 11:15 | Kai Schaefer v Louis Ducrot | L | 1-2 |
| Australian Open | 2023/08/02 02:25 | Su Li Yang v Kai Schaefer | L | 2-0 |
| French Open | 2023/10/26 11:45 | Toma Junior Popov v Anthony Sinisuka Ginting | L | 1-2 |
| French Open | 2023/10/25 10:05 | Toma Junior Popov v Srikanth Kidambi | W | 2-0 |
| Denmark Open | 2023/10/19 19:05 | Hongyang Weng v Toma Junior Popov | L | 2-0 |
| Denmark Open | 2023/10/17 07:00 | Toma Junior Popov v Shifeng Li | W | 2-1 |
| Arctic Open | 2023/10/11 09:30 | Toma Junior Popov v Kiran George | L | 1-2 |
| Hongkong Open | 2023/09/13 03:05 | Anders Antonsen v Toma Junior Popov | L | 2-0 |
| China Open | 2023/09/06 09:50 | Toma Junior Popov v Chun-Yi Lin | L | 1-2 |
| Mistrzostwa Świata | 2023/08/23 09:25 | Toma Junior Popov v Kodai Naraoka | L | 0-2 |