| UTR Pro Tennis Series Amsterdam | 2021/12/06 11:30 | Sem Verbeek v Tim Sandkaulen | 5-7,6-7 |
| UTR Pro Tennis Series Amsterdam | 2021/11/07 10:30 | Guy Den Heijer v Sem Verbeek | 6-3,6-3 |
| UTR Pro Tennis Series Amsterdam | 2021/11/06 13:30 | Thorsten Sollie v Sem Verbeek | 6-4,4-6,5-7 |
| UTR Pro Tennis Series Amsterdam | 2021/11/05 10:30 | Sem Verbeek v Mikhail Minakov | 6-2,6-3 |
| UTR Pro Tennis Series Amsterdam | 2021/11/03 12:00 | Sem Verbeek v Benjamin Dhoe | 6-3,6-4 |
| UTR Pro Tennis Series Amsterdam | 2021/11/02 13:30 | Sem Verbeek v Amadatus Admiraal | 6-2,6-2 |
| UTR Pro Tennis Series Amsterdam | 2021/11/01 10:30 | Tom Clavel v Sem Verbeek | 6-2,4-6,4-6 |
| Challenger Porto | 2021/06/29 16:40 | Sem Verbeek v Gastao Elias | 7-6,4-6,1-6 |
| UTR Pro Tennis Series Amsterdam | 2021/12/06 11:30 | Zachary Eisinga v Jurriaan Bol | 2-6,6-4,6-1 |
| ITF M15 Sharm El Sheikh | 2021/11/08 11:30 | Zachary Eisinga v Louis Allen | 5-7,7-5,8-10 |
| ITF M15 Sharm El Sheikh | 2021/11/07 17:00 | Zachary Eisinga v Danyil Chornous | 6-1,6-2 |
| ITF M15 Sharm El Sheikh | 2021/11/03 11:30 | Zachary Eisinga v Mason Recci | 4-6,4-6 |
| ITF M15 Sharm El Sheikh | 2021/11/02 07:30 | Zachary Eisinga v Abdulhamid Mubarak | 6-2,7-5 |
| ITF M15 Sharm El Sheikh | 2021/11/01 07:00 | Zachary Eisinga v Sebastian Sorger | 6-4,6-1 |
| ITF M15 Sharm El Sheikh | 2021/10/31 08:00 | Zachary Eisinga v Bogdan Seleznev | 6-3,6-0 |
| ITF M15 Cairo | 2021/09/30 11:45 | Luciano Darderi v Zachary Eisinga | 6-2,6-0 |