| Polish Open | 2024/03/23 09:00 | Kalle Koljonen v Kai Schaefer | W | 0-2 |
| Polish Open | 2024/03/22 14:40 | Kai Schaefer v Markus Barth | W | 2-0 |
| Orleans Masters - Qualifikation | 2024/03/12 13:40 | Daniil Dubovenko v Kai Schaefer | L | 2-1 |
| Orleans Masters - Qualifikation | 2024/03/12 11:55 | Kai Schaefer v Danylo Bosniuk | W | 2-0 |
| Portugal International | 2024/03/09 17:20 | Matthias Kicklitz v Kai Schaefer | L | 2-0 |
| Portugal International | 2024/03/09 10:40 | Kai Schaefer v Rafael Gavois | W | 2-0 |
| Portugal International | 2024/03/08 10:40 | Kai Schaefer v Aria Dinata | W | 2-1 |
| German Open - Qualifikation | 2024/02/27 08:00 | S. Sankar Muthusamy Subramanian v Kai Schaefer | L | 2-0 |
| Dutch International | 2024/03/15 15:40 | Victor Kauffmann v Joran Kweekel | W | 2-0 |
| Dutch International | 2024/03/15 09:00 | Victor Kauffmann v Rohan Midha | W | 2-0 |