Stadium: Cancha 6 Round: 27 Ground: Hardcourt outdoor
| ITF M15 Cochabamba | 2021/11/16 19:05 | Alejandro Mendoza v Luis Molina | 6-7,4-6 |
| ITF M15 Cancun | 2021/10/20 19:00 | Alejandro Mendoza v Emil Reinberg | 0-6,2-6 |
| ITF M15 Cancun | 2021/10/15 17:00 | Giles Hussey v Alejandro Mendoza | 6-3,6-1 |
| ITF M15 Cancun | 2021/10/13 20:10 | Alejandro H Franco v Alejandro Mendoza | 6-4,5-7,0-6 |
| ITF M15 Cancun | 2021/10/05 15:30 | Alejandro Mendoza v Sho Shimabukuro | 7-6,3-6,1-6 |
| ITF M15 Cancun | 2021/09/28 17:00 | Alejandro Mendoza v Seita Watanabe | 6-7,0-6 |
| Challenger Ambato | 2021/09/19 17:10 | Alejandro Gonzalez v Alejandro Mendoza | 6-2,6-2 |
| Challenger Quito | 2021/09/13 15:00 | Alexis Gautier v Alejandro Mendoza | 6-1,6-0 |
| 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 Tallahassee | 2021/10/27 14:00 | Colin Sinclair v Ryan Shane | 6-3,3-6,6-7 |
| ITF M15 Ithaca | 2021/10/05 16:00 | Taha Baadi v Colin Sinclair | 7-6,7-5 |
| ITF M25 Budapest | 2021/09/28 10:45 | Pawel Juszczak v Colin Sinclair | 6-2,7-6 |