| ITF M15 Cairo | 2021/09/30 11:45 | Luciano Darderi v Zachary Eisinga | 6-2,6-0 |
| ITF M15 Cairo | 2021/09/29 08:45 | Zachary Eisinga v Amr Asrawy | 6-0,6-1 |
| ITF M15 Cairo | 2021/09/23 08:00 | Billy Harris v Zachary Eisinga | 6-1,6-0 |
| ITF M15 Cairo | 2021/09/22 10:30 | Zachary Eisinga v Muthu A Senthilkumar | 5-7,6-3,6-1 |
| ITF M15 Cairo | 2021/09/16 11:30 | Simone Roncalli v Zachary Eisinga | 6-3,6-4 |
| ITF M15 Cairo | 2021/09/15 10:40 | Gabriel Ciro Da Silva v Zachary Eisinga | 7-6,4-6,2-6 |
| ITF M15 Huy | 2021/08/25 12:50 | Zachary Eisinga v Marvin Netuschil | 4-6,6-7 |
| ITF M15 Oldenzaal | 2021/08/18 14:10 | Constantin Schmitz v Zachary Eisinga | 6-3,7-6 |