Stadium: Stadium Round: 26 Ground: Hardcourt outdoor
| ITF M15 Guatemala | 2021/11/26 15:30 | Alejandro Mendoza v Colin Sinclair | 3-6,7-6,2-6 |
| ITF M15 Guatemala | 2021/11/25 15:30 | Osgar O'Hoisin v Colin Sinclair | 2-6,3-6 |
| ITF M15 Guatemala | 2021/11/23 18:00 | Rafael Botran Neutze v Colin Sinclair | 3-6,1-6 |
| ITF M15 East Lansing | 2021/11/19 17:55 | Alex Knaff v Colin Sinclair | 7-6,5-7,6-2 |
| ITF M15 East Lansing | 2021/11/18 18:00 | Alexandre Rotsaert v Colin Sinclair | 5-7,6-4,2-6 |
| ITF M15 East Lansing | 2021/11/17 20:45 | Nico Mostardi v Colin Sinclair | 3-6,4-6 |
| ITF M15 Ithaca | 2021/11/04 16:45 | Colin Sinclair v Vasil Kirkov | 3-6,4-6 |
| ITF M15 Ithaca | 2021/11/03 17:55 | Michael Zheng v Colin Sinclair | 0-6,2-6 |
| ITF M15 Guatemala | 2021/11/25 18:45 | Peter Bertran v Kuan Yu Chen | 5-7,7-5,6-7 |
| ITF M15 Guatemala | 2021/11/24 15:30 | Peter Bertran v Felipe Santamaria | 6-1,6-0 |
| ITF M25 Austin | 2021/11/18 19:50 | Sander Jong v Peter Bertran | 6-7,3-6 |
| ITF M25 Austin | 2021/11/16 23:25 | Peter Bertran v Gerardo L Villasenor | 3-6,6-1,6-1 |
| ITF M25 Harlingen | 2021/11/10 22:00 | Peter Bertran v Jaimee Floyd Angele | 2-6,2-6 |
| ITF M15 Cancun | 2021/10/20 17:00 | Giles Hussey v Peter Bertran | 6-2,7-5 |
| ITF M15 Naples | 2021/10/08 14:30 | Peter Bertran v Ryan Harrison | 3-6,1-6 |
| ITF M15 Naples | 2021/10/07 17:15 | Peter Bertran v Thiago Cigarran | 6-4,6-1 |