Stadium: Court 6 Round: 62 Ground: Hardcourt outdoor
| ITF M25 The Hague | 2021/06/27 08:00 | Dax Donders v Zachary Eisinga | 6-2,7-5 |
| 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 Skopje | 2021/05/31 08:00 | Tom Gentzsch v Louis Allen | 7-6,2-6,13-11 |
| ITF M15 Skopje | 2021/05/30 07:00 | Louis Allen v Leonid Sheyngezikht | 6-4,7-5 |
| ITF M15 Bucharest | 2021/05/24 08:00 | Valentin Royer v Louis Allen | 6-3,6-1 |
| ITF M15 Monastir | 2021/04/12 08:00 | Remy Bertola v Louis Allen | 6-2,6-0 |
| ITF M15 Monastir | 2021/04/11 08:00 | Luigi Castelletti v Louis Allen | 4-6,6-2,3-10 |
| ITF M15 Monastir | 2021/04/05 09:00 | Louis Allen v Fabio Coelho | 5-7,6-7 |
| ITF M15 Monastir | 2021/04/04 10:30 | Alessandro-D Ventre v Louis Allen | 2-6,6-3,3-10 |
| ITF M15 Monastir | 2021/03/28 09:00 | Olivier Rojas v Louis Allen | 6-2,6-0 |