| Lithuanian Int. Qual | 2019/06/06 08:55 | Brady, Mark v De Decker, Sander | L | 2-0 |
| Latvia Int. Qual | 2019/05/30 12:00 | Loo, Marcus v De Decker, Sander | W | 1-2 |
| Hellas Int. Qual | 2019/05/03 06:30 | Dogan, Haktan v De Decker, Sander | L | 2-0 |
| Open de Suisse - Doubles Femmes - Qualif. | 2018/04/12 08:05 | Mohamed A Belarbi v De Decker, Sander | L | 2-1 |