Stadium: Hard Court 2 Round: 62 Ground: Hardcourt outdoor
| ITF M25 Eupen | 2021/09/07 07:30 | Dax Donders v Rayane Oumaouche | 4-6,3-6 |
| ITF M25 Eupen | 2021/09/06 13:05 | Dax Donders v Andre Megrabian | 6-4,6-3 |
| ITF M25 Eupen | 2021/09/05 10:30 | Dax Donders v Stephan Iserath | 6-2,6-2 |
| ITF M15 Oldenzaal | 2021/08/15 14:00 | Dax Donders v Arthur Van Der Kooij | 6-1,6-4 |
| ITF M25 Marburg | 2021/07/05 10:35 | Christoph Negritu v Dax Donders | 7-6,7-6 |
| ITF M25 The Hague | 2021/06/28 07:50 | Lodewijk Weststrate v Dax Donders | 6-7,6-1,10-5 |
| ITF M25 The Hague | 2021/06/27 08:00 | Dax Donders v Zachary Eisinga | 6-2,7-5 |
| ITF M25 Alkmaar | 2021/06/24 14:55 | Dax Donders v Javier Barranco Cosano | 4-6,2-6 |
| ITF M15 Heraklion | 2021/11/02 07:00 | Leon Hoeveler v Axel Bergdahl | 7-6,7-6 |
| ITF M15 Heraklion | 2021/11/01 09:00 | Max Van Wijk v Axel Bergdahl | 5-7,2-6 |
| ITF M25 Falun | 2021/09/26 13:00 | Vladimir Ivanov v Axel Bergdahl | 6-4,2-6,10-6 |
| ITF M25 Jonkoping | 2021/09/20 08:50 | Axel Bergdahl v Tibo Colson | 2-6,0-6 |
| ITF M25 Jonkoping | 2021/09/19 11:00 | Tom Hands v Axel Bergdahl | 5-7,6-4,6-10 |