| ITF - M15 Sharm El Sheikh | 2021/11/08 11:30 | Eisinga, Zachary v Louis Allen | 5-7,7-5,8-10 |
| ITF - M15 Sharm El Sheikh | 2021/11/07 17:00 | Eisinga, Zachary v Chornous, Danyil | 6-1,6-2 |
| ITF - M15 Sharm El Sheikh | 2021/11/03 11:30 | Eisinga, Zachary v Recci, Mason | 4-6,4-6 |
| ITF - M15 Sharm El Sheikh | 2021/11/02 07:30 | Eisinga, Zachary v Mubarak, Abdulhamid | 6-2,7-5 |
| ITF - M15 Sharm El Sheikh | 2021/11/01 07:00 | Eisinga, Zachary v Sebastian Sorger | 6-4,6-1 |
| ITF - M15 Sharm El Sheikh | 2021/10/31 08:00 | Eisinga, Zachary v Bogdan Seleznev | 6-3,6-0 |
| ITF M15 Cairo | 2021/09/30 11:45 | Luciano Darderi v Eisinga, Zachary | 6-2,6-0 |
| ITF M15 Cairo | 2021/09/29 08:45 | Eisinga, Zachary v Asrawy, Amr | 6-0,6-1 |
| ITF - M15 Héraklion | 2021/11/29 10:00 | Preston Brown v Jurriaan Bol | 6-3,7-6 |
| ITF - M15 Héraklion | 2021/11/28 11:00 | Cohen, Eduardo v Jurriaan Bol | 7-5,1-6,6-10 |
| UTR Pro Tennis Series Mulheim | 2021/09/25 12:01 | Thijmen Loof v Jurriaan Bol | 2-6,3-5 |
| UTR Pro Tennis Series Mulheim | 2021/09/25 08:30 | Alen Moritz Hodzic v Jurriaan Bol | 2-6,2-6 |
| UTR Pro Tennis Series Mulheim | 2021/09/24 08:00 | Keisidis, Christos v Jurriaan Bol | 1-6,4-6 |
| UTR Pro Tennis Series Mulheim | 2021/09/23 11:00 | Colin Sinclair v Jurriaan Bol | 6-3,6-3 |
| UTR Pro Tennis Series Mulheim | 2021/09/22 12:30 | Edison Ambarzumjan v Jurriaan Bol | 6-4,2-6,2-6 |
| UTR Pro Tennis Series Mulheim | 2021/09/20 09:30 | Artem Podorozhnyi v Jurriaan Bol | 7-6,5-3 |