| Open de Suisse - Doubles Femmes - Qualif. | 2018/10/30 10:55 | Ethan Rose v Kramer, David | W | 1-2 |
| Open de Suisse - Doubles Femmes - Qualif. | 2018/09/20 16:55 | Kramer, David v Holub, Lukas | W | 2-0 |
| Open de Suisse - Doubles Femmes - Qualif. | 2017/12/05 11:00 | Kramer, David v Giesinger, Michael | L | 0-2 |
| Indonesia Masters XD | 2017/10/31 18:15 | Corvee, Lucas v Kramer, David | L | 2-0 |
| Open de Suisse - Doubles Femmes - Qualif. | 2017/10/31 10:00 | Kramer, David v Thomas, Juno | W | 2-0 |
| Giraldilla Int. XD | 2017/04/20 13:20 | Murat Sen v Kramer, David | L | 2-0 |
| Giraldilla Int. XD | 2018/09/28 08:30 | Kai Schaefer v Subhankar Dey | L | 1-2 |
| Giraldilla Int. XD | 2018/09/23 14:00 | Dani, Harsheel v Kai Schaefer | W | 1-2 |
| Giraldilla Int. XD | 2018/09/23 09:20 | Heino, Iikka v Kai Schaefer | W | 0-2 |
| Giraldilla Int. XD | 2018/09/22 12:00 | Messerschmidt, Rasmus v Kai Schaefer | W | 0-2 |
| Giraldilla Int. XD | 2018/08/29 12:50 | Igarashi, Yu v Kai Schaefer | L | 2-0 |
| Open d'Angleterre | 2018/07/31 09:40 | Kai Schaefer v Hans-Kristian Vittinghus | L | 1-2 |
| Open de Suisse - Doubles Femmes - Qualif. | 2018/07/17 00:55 | Kai Schaefer v Kholik, Firman Abdul | L | 1-2 |
| Giraldilla Int. XD | 2018/06/20 19:40 | Thammasin, S. v Kai Schaefer | L | 2-0 |