Stadium: Court 7 Round: 26 Ground: Clay
| Challenger Amersfoort MD | 2021/07/16 09:00 | De Jonge/Ouden v Castelnuovo/Guinard | 3-6,2-6 |
| Challenger Amersfoort MD | 2021/07/13 12:50 | de Jong/Stevens v De Jonge/Ouden | 4-6,6-7 |
| ITF M25 Marburg MD | 2021/07/10 15:20 | De Jonge/Ouden v Handel/Steinegger | 2-6,6-4,11-9 |
| ITF M25 Marburg MD | 2021/07/10 09:00 | Steiner/Zahraj v De Jonge/Ouden | 3-6,7-5,1-10 |
| ITF M25 Marburg MD | 2021/07/06 17:00 | Donders/Weng v De Jonge/Ouden | 4-6,6-3,7-10 |
| ITF M15 Alkmaar MD | 2020/08/27 12:45 | Hermans/Verbeek v De Jonge/Ouden | 6-4,7-5 |
| ITF M15 Alkmaar MD | 2020/08/26 14:05 | De Jonge/Ouden v Hamou/Paz | 6-4,6-4 |