| UTR Pro Tennis Series Florida | 2021/09/15 12:00 | Nikolay Sysoev v Roman Postolka | 2-6,2-6 |
| UTR Pro Tennis Series Florida | 2021/09/14 13:30 | Nikolay Sysoev v Michal Schmid | 6-7,2-5 |
| UTR Pro Tennis Series Florida | 2021/09/13 12:00 | Nikolay Sysoev v Omar Maldonado | 7-6,6-4 |
| ITF M15 Monastir | 2021/08/01 09:00 | Drew Baird v Nikolay Sysoev | 6-1,6-2 |
| ITF M15 Monastir | 2021/07/25 08:00 | Nikolay Sysoev v Austin Ansari | 2-6,0-6 |
| ITF M15 Monastir | 2021/07/19 09:00 | Nikolay Sysoev v Joshua Sheehy | 2-6,1-6 |
| ITF M15 Monastir | 2021/07/18 09:00 | Fermin Calvo Barcelo v Nikolay Sysoev | 3-6,6-4,6-10 |
| ITF M15 Monastir | 2021/07/11 09:00 | Evgeny Philippov v Nikolay Sysoev | 6-2,6-1 |
| UTR Pro Tennis Series Florida | 2021/09/15 17:30 | Omar Maldonado v Antonio M-Hidalgo | 1-6,0-0 |
| UTR Pro Tennis Series Florida | 2021/09/13 13:30 | Michal Schmid v Antonio M-Hidalgo | 6-4,3-2 |
| UTR Pro Tennis Series Florida | 2021/08/22 12:00 | Antonio M-Hidalgo v Theo Winegar | 6-7,6-1,6-1 |
| UTR Pro Tennis Series Florida | 2021/08/21 12:00 | Antonio M-Hidalgo v Ignacio Buse | 2-6,1-0 |
| UTR Pro Tennis Series Florida | 2021/08/20 14:00 | Antonio M-Hidalgo v Juan David Velasquez | 5-7,2-6 |
| UTR Pro Tennis Series Florida | 2021/08/18 14:30 | Antonio M-Hidalgo v Jorge Panta | 7-6,6-1 |
| UTR Pro Tennis Series Florida | 2021/08/17 14:30 | Antonio M-Hidalgo v Duilio Vallebuona | 6-3,6-2 |
| UTR Pro Tennis Series Florida | 2021/08/16 16:00 | Evan Bynoe v Antonio M-Hidalgo | 7-6,0-5 |