Stadium: Cancha 3 Round: 19 Ground: Clay
| Challenger - Santiago | 2021/10/03 14:00 | Oliver Crawford v Daniel Antonio Nunez | 7-5,6-2 |
| ITF M25 Medellin | 2021/09/16 16:25 | Daniel Antonio Nunez v Joao Lucas Reis da Silva | 5-7,4-6 |
| ITF M25 Medellin | 2021/09/15 15:00 | Daniel Antonio Nunez v Sergio Luis H Ramirez | 6-3,6-3 |
| ITF M15 Ibagué | 2021/09/07 16:20 | Juan Sebastian Gomez v Daniel Antonio Nunez | 7-5,6-1 |
| ITF M15 Antalya | 2021/06/21 09:10 | Daniil Savelev v Daniel Antonio Nunez | 2-6,3-6 |
| ITF M15 Antalya | 2021/06/20 07:00 | Michalis Sakellaridis v Daniel Antonio Nunez | 6-7,3-6 |
| ITF M15 Antalya | 2021/06/15 11:50 | Francisco Llanes v Daniel Antonio Nunez | 6-7,7-6,10-6 |
| ITF M15 Antalya | 2021/06/14 07:30 | Nikolay Sysoev v Daniel Antonio Nunez | 2-6,3-6 |
| Challenger - Santiago | 2021/10/03 14:00 | Alexis Gautier v Rafael Matos | 6-3,6-2 |
| Challenger Tulln | 2021/09/05 13:00 | Rafael Matos v Tobias Simon | 6-7,2-6 |
| Challenger Cordenons | 2021/08/01 09:00 | Camilo Ugo Carabelli v Rafael Matos | 4-6,7-5,6-2 |
| Challenger Aix en Provence | 2021/06/13 11:15 | Nikolas Sanchez Izquierdo v Rafael Matos | 6-2,6-2 |
| Challenger - Tallahassee | 2021/04/18 19:30 | Rafael Matos v Sekou Bangoura | 3-6,4-6 |
| Challenger - Santiago | 2021/03/16 17:10 | Pedro Sousa v Rafael Matos | 6-4,6-3 |
| Challenger - Santiago | 2021/03/15 13:00 | Joao Menezes v Rafael Matos | 6-2,6-4 |
| Challenger - Santiago | 2021/03/14 14:00 | Luis David Martinez v Rafael Matos | 2-6,3-6 |