Stadium: Centre Court Round: 54 Ground: Clay
| ITF - M25 Alkmaar | 2021/06/24 14:55 | Dax Donders v Javier Barranco Cosano | 4-6,2-6 |
| ITF - M25 Alkmaar | 2021/06/23 18:05 | Dax Donders v Amaury Raynel | 5-7,6-3,6-1 |
| ITF - M15 Skopje | 2021/05/30 08:00 | Dax Donders v Taiyo Yamanaka | 4-6,4-6 |
| ITF - M15 Antalya | 2021/05/09 07:00 | Dax Donders v Alafia Ayeni | 5-7,3-6 |
| ITF - M15 Antalya | 2021/05/03 07:00 | Dax Donders v Colin Sinclair | 6-1,3-6,4-10 |
| ITF - M15 Antalya | 2021/05/02 06:00 | Dax Donders v Oscar Moraing | 4-6,6-4,10-7 |
| ITF - M15 Antalya | 2021/03/30 07:00 | Max Houkes v Dax Donders | 6-2,6-2 |
| ITF - M15 Antalya | 2021/03/28 06:30 | Dax Donders v Edoardo Eremin | 7-6,2-6,10-6 |
| ITF - M25 Alkmaar | 2021/06/21 14:25 | Guillaume Dermiens v Zachary Eisinga | 4-6,7-5,13-11 |
| ITF - M25 Alkmaar | 2021/06/20 12:30 | Lodewijk Weststrate v Zachary Eisinga | 2-6,1-6 |
| ITF - M15 Cairo | 2021/05/04 08:00 | Zachary Eisinga v Martin Dimitrov | 1-6,6-7 |
| ITF - M15 Cairo | 2021/05/03 08:00 | Zachary Eisinga v Ali Alshati | 3-6,6-0,10-8 |
| ITF - M15 Cairo | 2021/04/28 10:00 | Zachary Eisinga v Shintaro Mochizuki | 4-6,2-6 |
| ITF - M15 Cairo | 2021/04/19 10:30 | Zachary Eisinga v Fares Zakaria | 2-6,6-3,3-10 |
| ITF - M15 Cairo | 2021/04/18 07:00 | Zachary Eisinga v Anton Magnusson | 6-2,4-6,10-2 |
| ITF - M15 Alkmaar | 2020/08/24 08:30 | Raphael Collignon v Zachary Eisinga | 6-4,6-3 |