 Netherlands: M15 Oldenzaal - Doubles - Main |
|---|
| Quarter-finals | De Jonge D./Den Ouden G. | Binding J./Whitehouse M. | 1:2 (6:3, 4:6, 7:10) | details | 20.08.2021 |
| 1/8-finals | Jans J./Van Baal A. J. W. | De Jonge D./Den Ouden G. | 1:2 (0:6, 7:69, 6:10) | details | 17.08.2021 |
 Denmark: M15 Frederiksberg - Doubles - Main |
|---|
| 1/8-finals | De Jonge D./Den Ouden G. | Hannestad B./Soendergaard S. F. | 0:2 (1:6, 3:6) | details | 04.08.2021 |
| Netherlands: Amersfoort - Doubles - Main |
|---|
| Quarter-finals | De Jonge D./Den Ouden G. | Castelnuovo L./Guinard M. | 0:2 (3:6, 2:6) | details | 16.07.2021 |
| 1/8-finals | De Jong J./Stevens B. | De Jonge D./Den Ouden G. | 0:2 (4:6, 62:7) | details | 13.07.2021 |
 Germany: M25 Marburg - Doubles - Main |
|---|
| Final | De Jonge D./Den Ouden G. | Handel T./Steinegger Y. | 2:1 (2:6, 6:4, 11:9) | details | 10.07.2021 |
| Semi-finals | Steiner M./Zahraj P. | De Jonge D./Den Ouden G. | 1:2 (3:6, 7:5, 1:10) | details | 10.07.2021 |
| Quarter-finals | Metreveli A./Tepavac M. | De Jonge D./Den Ouden G. | 1:2 (1:6, 6:4, 4:10) | details | 09.07.2021 |
| 1/8-finals | Donders D./Weng Jing Long | De Jonge D./Den Ouden G. | 1:2 (4:6, 6:3, 7:10) | details | 06.07.2021 |
| Netherlands: M15 Alkmaar - Doubles - Main |
|---|
| Quarter-finals | Hermans M./Verbeek S. | De Jonge D./Den Ouden G. | 2:0 (6:4, 7:5) | details | 27.08.2020 |
| 1/8-finals | De Jonge D./Den Ouden G. | Hamou M./Paz J. P. | 2:0 (6:4, 6:4) | details | 26.08.2020 |
