| Lithuanian Int. | 2019/06/07 11:40 | Valentin Singer v Andraz Krapez | L | 1-2 |
| Croatian International | 2019/04/19 14:30 | Max Weisskirchen v Valentin Singer | L | 2-0 |
| Croatian International | 2019/04/19 08:30 | Valentin Singer v Filip Budzel | W | 2-0 |
| Orleans Masters - Calificari | 2019/03/19 15:00 | Valentin Singer v Siddharth Pratap Singh | L | 0-2 |
| Orleans Masters - Calificari | 2019/03/19 09:10 | Valentin Singer v Christian Kirchmayr | W | 2-1 |
| Swiss Open - Dublu Feminin - Calificari | 2019/03/07 20:20 | Aram Mahmoud v Valentin Singer | L | 2-0 |
| Swiss Open - Dublu Feminin - Calificari | 2019/02/20 14:00 | Valentin Singer v Ditlev Jaeger Holm | L | 0-2 |
| Swiss Open - Dublu Feminin - Calificari | 2019/01/10 12:00 | Valentin Singer v Valeriy Atrashchenkov | L | 1-2 |