Germany: M15 Frankfurt am Main - Doubles - Main |
| Semi-finals | Haerteis J./Schell N. | Donders D./Visker N. | 2:0 (7:63, 6:2) | details | 11.08.2023 |
| Quarter-finals | Donders D./Visker N. | Chepelev A./Golubev D. | 2:0 (6:2, 7:5) | details | 10.08.2023 |
| 1/8-finals | Donders D./Visker N. | Grey D./Penzlin J. | 2:1 (6:4, 4:6, 13:11) | details | 08.08.2023 |
Netherlands: M15 Eindhoven - Doubles - Main |
| 1/8-finals | De Jonge D./Den Heijer G. | Donders D./Visker N. | 2:0 (6:3, 6:1) | details | 02.08.2023 |
Luxembourg: M25 Esch/Alzette - Doubles - Main |
| Quarter-finals | Donders D./Visker N. | Knaff A./Rodesch C. | 0:2 (63:7, 1:6) | details | 12.07.2023 |
| 1/8-finals | Gil Garcia A./Mishkin K. | Donders D./Visker N. | 0:2 (3:6, 64:7) | details | 11.07.2023 |
| 1/8-finals | Mora M./Papamalamis T. | Donders D./Visker N. | CAN. | details | 11.07.2023 |
Netherlands: M25 The Hague - Doubles - Main |
| Quarter-finals | Hammond L./Hornung M. | Donders D./Visker N. | 2:1 (7:61, 2:6, 10:5) | details | 06.07.2023 |
| 1/8-finals | Pel S./Van Baal A. J. W. | Donders D./Visker N. | 0:2 (64:7, 5:7) | details | 04.07.2023 |
Turkey: M15 Antalya 10 - Doubles - Main |
| Quarter-finals | Donders D./Visker N. | Gulin S./Rudiukov I. | 0:2 (3:6, 2:6) | details | 06.04.2023 |
| 1/8-finals | Donders D./Visker N. | Den Heijer G./Pontjodikromo S. | 2:0 (6:3, 7:5) | details | 04.04.2023 |
Turkey: M15 Antalya 9 - Doubles - Main |
| Semi-finals | Donders D./Visker N. | Den Heijer G./Pontjodikromo S. | 0:2 (62:7, 3:6) | details | 31.03.2023 |
| Quarter-finals | Madaras N./Martinez M. | Donders D./Visker N. | 0:2 (2:6, 0:6) | details | 30.03.2023 |
| 1/8-finals | Alcala Gurri M./Kumasaka T. | Donders D./Visker N. | 0:2 (1:6, 2:6) | details | 28.03.2023 |
Belgium: M25 Eupen - Doubles - Main |
| Quarter-finals | Donders D./Visker N. | Fery A./Schoolkate T. | 0:2 (1:6, 2:6) | details | 09.09.2021 |
| 1/8-finals | Gadamauri B./Rojas O. | Donders D./Visker N. | 1:2 (7:61, 2:6, 4:10) | details | 07.09.2021 |