| Hellas Int. Qual | 2019/05/02 11:30 | Christopher Klauer v Batuhan Yilmaz | W | 2-0 |
| Dutch Int. Qual | 2019/04/11 18:00 | Sebastian Bugtrup v Christopher Klauer | L | 2-0 |
| Swiss Open WD Qual | 2019/03/07 10:10 | Christopher Klauer v Gergo Pytel | L | 0-2 |
| Swiss Open WD Qual | 2019/01/10 09:00 | Valentin Singer v Christopher Klauer | L | 2-0 |