| Swedish Open Qual | 2023/05/11 16:55 | Filip Karlborg v Xiaodong Sheng | L | 0-2 |
| Swedish Open Qual | 2023/05/11 11:40 | Filip Karlborg v Marcus Viscovich | W | 2-0 |
| Luxembourg Open Qual | 2023/05/04 08:40 | Kian-Yu Oei v Filip Karlborg | L | 2-0 |
| Dutch Int. Qual | 2023/04/13 09:30 | Filip Karlborg v Magnus Klinggaard | L | 1-2 |
| Polish Open Qual | 2023/03/23 10:20 | Joakim Oldorff v Filip Karlborg | L | 2-0 |
| Polish Open Qual | 2023/03/22 16:45 | Filip Karlborg v Armin Sarosi | W | 2-0 |
| Portugal Int. Qual | 2023/03/08 13:00 | Filip Karlborg v Simon Baron-Vezilier | L | 0-2 |
| Estonian Int. Qual | 2023/01/12 11:30 | Johan Azelius v Filip Karlborg | L | 2-0 |
| European Games | 2023/06/26 08:30 | Toma Junior Popov v Karl Kert | L | 2-0 |
| Lithuanian Int. | 2023/06/09 13:15 | Rui Yang Ryan Tan v Karl Kert | L | 2-1 |
| Austrian Open Qual | 2023/05/25 08:35 | Harsheel Dani v Karl Kert | L | 2-0 |
| Swedish Open Qual | 2023/05/11 07:35 | Marcus Viscovich v Karl Kert | L | 2-0 |
| Polish Open Qual | 2023/03/22 16:10 | Daniel S Farid v Karl Kert | L | 2-1 |
| Polish Open Qual | 2023/03/22 08:25 | Camilo Borst v Karl Kert | W | 0-2 |
| Iceland Int. | 2023/01/27 14:15 | Karl Kert v Marcus Viscovich | L | 0-2 |
| Estonian Int. Qual | 2023/01/12 10:55 | Iikka Heino v Karl Kert | L | 2-0 |