 Kazakhstan: M15 Aktobe 2 - Doubles - Main |
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| 1/8-finals | Den Heijer G./Donders D. | Kukasian A./Nesterov P. | 0:2 (5:7, 2:6) | details | 12.03.2024 |
| Kazakhstan: M15 Aktobe - Doubles - Main |
|---|
| Semi-finals | Liaonenka A./Zgirovsky A. | Den Heijer G./Donders D. | 2:0 (6:3, 7:5) | details | 08.03.2024 |
| Quarter-finals | Lomakin G./Philippov E. | Den Heijer G./Donders D. | 1:2 (5:7, 6:3, 4:10) | details | 07.03.2024 |
| 1/8-finals | Den Heijer G./Donders D. | Baiant R./Gloeckler M. | 2:0 (6:2, 6:4) | details | 05.03.2024 |
 Egypt: M15 Sharm ElSheikh 2 - Doubles - Main |
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| 1/8-finals | Elsayed A./Ibrahim K. | Den Heijer G./Donders D. | 2:1 (7:64, 65:7, 10:5) | details | 06.02.2024 |
 Kuwait: M15 Zahra 3 - Doubles - Main |
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| Semi-finals | Den Heijer G./Donders D. | Bakshi A./Tkemaladze Z. | 0:2 (0:6, 4:6) | details | 15.12.2023 |
| Quarter-finals | Den Heijer G./Donders D. | Alkotop M./Dorofeev A. | WO. | details | 14.12.2023 |
| 1/8-finals | Den Heijer G./Donders D. | Schuetze C./Steiner M. | 2:0 (7:66, 6:2) | details | 12.12.2023 |
 Greece: M25 Heraklion - Doubles - Main |
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| Final | Forti F./Romano F. | Den Heijer G./Donders D. | 2:1 (4:6, 7:61, 10:4) | details | 04.11.2023 |
| Semi-finals | Sakellaridis M./Santibanez S. | Den Heijer G./Donders D. | WO. | details | 03.11.2023 |
| Quarter-finals | Den Heijer G./Donders D. | Pontjodikromo S./Visker N. | 2:0 (6:4, 7:62) | details | 02.11.2023 |
| 1/8-finals | Antonopoulos C./Gima S. | Den Heijer G./Donders D. | 1:2 (6:4, 3:6, 4:10) | details | 31.10.2023 |
| Greece: M15 Heraklion 4 - Doubles - Main |
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| Semi-finals | Den Heijer G./Donders D. | Pontjodikromo S./Visker N. | 1:2 (4:6, 7:5, 5:10) | details | 27.10.2023 |
| Quarter-finals | Charlton J./Fenty A. | Den Heijer G./Donders D. | WO. | details | 26.10.2023 |
| 1/8-finals | Huber D./Kahoun J. | Den Heijer G./Donders D. | 0:2 (62:7, 61:7) | details | 24.10.2023 |
| 1/8-finals | Kielan S./Ojakaar O. | Den Heijer G./Donders D. | CAN. | details | 24.10.2023 |
| Greece: M15 Heraklion 3 - Doubles - Main |
|---|
| Quarter-finals | Den Heijer G./Donders D. | Huber D./Kahoun J. | 0:2 (4:6, 3:6) | details | 19.10.2023 |
| 1/8-finals | Den Heijer G./Donders D. | Parker S./Quayle D. | 2:1 (3:6, 6:3, 10:8) | details | 18.10.2023 |
 Netherlands: M15 Alkmaar - Doubles - Main |
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| Semi-finals | Jong A. M./Nijboer R. | Den Heijer G./Donders D. | 2:1 (6:2, 65:7, 11:9) | details | 30.06.2023 |
| Quarter-finals | Den Heijer G./Donders D. | Clavel T./Stuurman R. | 2:0 (6:2, 6:0) | details | 29.06.2023 |
| 1/8-finals | Den Heijer G./Donders D. | Lalami Laaroussi Y./Von der Schulenburg J. | 2:0 (7:5, 6:3) | details | 27.06.2023 |
