Stadium: Court 6 Round: 54 Ground: Clay
| ITF M25 Alkmaar | 2021/06/20 10:30 | Takanyi Garanganga v Guillaume Dermiens | 3-6,1-6 |
| ITF M15 Antalya | 2021/06/08 07:00 | Franco Roncadelli v Guillaume Dermiens | 6-2,6-0 |
| ITF M15 Antalya | 2021/06/07 09:35 | Credit Chaiyarin v Guillaume Dermiens | 0-6,4-6 |
| ITF M15 Antalya | 2021/05/31 08:30 | Nicolas Parizzia v Guillaume Dermiens | 6-3,1-6,10-5 |
| ITF M15 Monastir | 2021/04/11 11:00 | Guillaume Dermiens v Arthur Bouquier | 6-4,5-7,10-12 |
| ITF M15 Monastir | 2021/04/05 09:00 | Hazem Naw v Guillaume Dermiens | 6-2,6-2 |
| ITF M15 Monastir | 2021/04/04 10:30 | Guillaume Dermiens v Samuel Puskar | 6-2,6-3 |
| ITF M15 Monastir | 2021/03/08 12:30 | Guillaume Dermiens v Constant De La Bassetiere | 3-6,2-6 |
| 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 |
| ITF M15 Alkmaar | 2020/08/23 08:30 | Cheraag Bajwa v Zachary Eisinga | 1-6,2-6 |