Stadium: Court 6 Round: 44 Ground: Hardcourt outdoor
| ITF M15 Cancun | 2021/12/12 15:00 | Nikolay Sysoev v Jose E Yapur | 6-0,6-1 |
| ITF M15 Cancun | 2021/12/06 14:00 | Nikolay Sysoev v Trent Bryde | 4-6,6-3,5-10 |
| ITF M25 Vero Beach | 2021/10/19 16:00 | Diogo Marques v Nikolay Sysoev | 6-2,6-4 |
| ITF M25 Vero Beach | 2021/10/18 16:00 | Nikolay Sysoev v Jordan Parker | 6-2,6-7,10-7 |
| ITF M15 Naples | 2021/10/12 13:30 | Tristan McCormick v Nikolay Sysoev | 4-6,6-4,10-5 |
| ITF M15 Naples | 2021/10/11 14:30 | Xavier Lawrence v Nikolay Sysoev | 7-6,3-6,3-10 |
| ITF M15 Naples | 2021/10/07 13:30 | Nikolay Sysoev v Juan Ignacio Galarza | 1-6,1-6 |
| ITF M15 Naples | 2021/10/06 13:30 | Nikolay Sysoev v Fletcher Scott | 6-4,6-4 |
| ITF M15 Cancun | 2021/12/08 15:10 | Arklon H D Pino v Ren Nakamura | 6-4,6-3 |
| ITF M15 Cancun | 2021/12/07 16:00 | Alan Sau Franco v Ren Nakamura | 7-6,6-3 |
| ITF M15 Cancun | 2021/12/05 17:00 | Felipe Santamaria v Ren Nakamura | 2-6,3-6 |
| ITF M15 Cancun | 2021/12/02 16:00 | Kiranpal Pannu v Ren Nakamura | 6-2,6-4 |
| ITF M15 Cancun | 2021/11/30 16:00 | Ren Nakamura v Joshua Sheehy | 6-7,0-6 |
| ITF M15 Cancun | 2021/11/29 14:00 | Masamichi Imamura v Ren Nakamura | 2-6,4-6 |
| ITF M15 Cancun | 2021/11/28 14:00 | Juan Sebastian Osorio v Ren Nakamura | 6-3,3-6,9-11 |
| ITF M25 Afula | 2021/11/09 12:50 | Rio Noguchi v Ren Nakamura | 7-6,6-2 |