Stadium: Court 6 Round: 27 Ground: Clay
| ITF M15 Oldenzaal MD | 2021/08/17 14:20 | Jans/Van Baal v De Jonge/Ouden | 0-6,7-6,6-10 |
| ITF M15 Frederiksberg MD | 2021/08/04 14:10 | De Jonge/Ouden v Hannestad/Soendergaard | 1-6,3-6 |
| 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 Oldenzaal MD | 2021/08/17 12:25 | Uryson/Wenger v Binding/Whitehouse | 6-1,3-6,8-10 |