| Hungarian Int. Qual | 2019/10/30 13:35 | Karl Kert v Christensen, Jeppe Bruun | L | 0-2 |
| Hungarian Int. Qual | 2019/10/30 09:20 | Karl Kert v Mattias Xu | W | 2-1 |
| Open de Suisse - Doubles Femmes - Qualif. | 2019/01/17 15:00 | Lu, Kaj Sjang v Karl Kert | L | 2-0 |
| Open de Suisse - Doubles Femmes - Qualif. | 2019/01/17 11:00 | Karl Kert v Toft, Jesper | W | 2-0 |
| Open de Suisse - Doubles Femmes - Qualif. | 2018/08/29 13:30 | Qowimuramadhoni, Azmy v Karl Kert | L | 2-0 |
| Open de Suisse - Doubles Femmes - Qualif. | 2018/08/29 11:05 | Borg-Sigg, Niklas v Karl Kert | W | 0-2 |
| Open de Suisse - Doubles Femmes - Qualif. | 2018/08/29 08:30 | Svejda, Tomas v Karl Kert | W | 1-2 |
| Open de Suisse - Doubles Femmes - Qualif. | 2018/04/05 16:20 | Karl Kert v M, Kanishq | L | 0-2 |
| Belgian Int. Qual | 2019/09/11 17:25 | Jaeger, Jonas v Julien Carraggi | L | 0-2 |
| Belgian Int. Qual | 2019/09/11 12:20 | Matthias Kicklitz v Jaeger, Jonas | W | 1-2 |
| Belgian Int. Qual | 2019/09/11 09:40 | Hammes, Felix v Jaeger, Jonas | W | 1-2 |
| Dutch Int. - Qualif. | 2019/04/11 11:10 | Jaeger, Jonas v Spencer-Smith, Michael | W | 2-1 |
| Open de Suisse - Doubles Femmes - Qualif. | 2018/01/18 11:00 | Lu, Kaj Sjang v Jaeger, Jonas | L | 2-1 |