| Luxembourg Open XD | 05/05 07:00 | - | Duijs/Loos v Schlevoigt/Meyer | L | 0-2 | |
| Dutch Int. - Doubles Mixtes | 04/14 07:05 | - | Su/Lee v Duijs/Loos | L | 2-0 | |
| Estonie Int. - Doubles Mixtes | 01/13 07:20 | - | Duijs/Loos v Ducrot/Hoyaux | L | 0-2 | |
| Slovenia Future Series XD | 11/25 13:00 | - | Duijs/Loos v Birker/Au Yeong | L | 0-2 | |
| Hungarian Int. XD | 11/03 10:30 | - | Duijs/Loos v Tomic/Vitman | L | 0-2 | |
| Dutch Open XD | 10/13 07:15 | - | Duijs/Loos v Liao/Liu | L | 0-2 | |
| Belgian International 2019, XD, Qualification | 09/14 10:45 | - | Duijs/Loos v Chiu/Lin | L | 0-2 | |
| Bonn Int. XD | 06/16 10:00 | - | Duijs/Loos v Russ / Kelly | L | 0-2 | |
| Luxembourg Open XD | 05/07 08:00 | - | Faza/Rismawardani v Duijs/Loos | L | 2-0 | |
| Luxembourg Open XD | 05/06 09:40 | - | Duijs/Loos v Bizjak/Novak | W | 2-0 | |
| Luxembourg Open XD | 05/06 07:40 | - | Feltes/Sinico v Duijs/Loos | W | 0-2 | |
| Dutch Int. - Doubles Mixtes | 04/14 14:20 | - | Yeung/Yeung v Duijs/Loos | L | 2-0 |