Stadium: Cancha 2 Round: 14 Ground: Clay
| Challenger Guayaquil | 2021/11/04 19:40 | Tomas Martin Etcheverry v Nicolas Alvarez Varona | 6-4,3-6,7-6 |
| Challenger Guayaquil | 2021/11/02 22:00 | Nicolas Alvarez Varona v Hidalgo, Diego | 2-6,6-4,6-3 |
| Challenger Guayaquil | 2021/11/01 16:00 | Nicolas Alvarez Varona v Gonzalez, Alejandro | 4-6,6-7 |
| Challenger Guayaquil | 2021/10/31 16:00 | Nicolas Alvarez Varona v Francisco Castro | 6-0,6-0 |
| Challenger Losinj | 2021/10/19 12:00 | Nicolas Alvarez Varona v Nerman Fatic | 5-7,2-6 |
| Challenger Losinj | 2021/10/18 08:00 | Nicolas Alvarez Varona v Reboul, Fabien | 6-4,6-4 |
| Challenger Losinj | 2021/10/17 08:00 | Nicolas Alvarez Varona v Sabanov, Ivan | 6-2,6-2 |
| Alicante, Spain | 2021/10/12 09:45 | Balaji, N. Sriram v Nicolas Alvarez Varona | 5-7,6-4,6-4 |
| Challenger - Buenos Aires | 2021/10/18 15:00 | Francisco Comesana v Matos, Rafael | 6-4,6-1 |
| Challenger - Buenos Aires | 2021/10/17 14:00 | Llanes, Francisco v Matos, Rafael | 0-6,6-4,1-6 |
| Challenger - Santiago | 2021/10/12 14:00 | Matos, Rafael v Diego F Flores | 2-6,6-4,4-6 |
| Challenger - Santiago | 2021/10/11 15:40 | Daniel Antonio Nunez v Matos, Rafael | 4-6,6-7 |
| Challenger - Santiago | 2021/10/03 14:00 | Alexis Gautier v Matos, Rafael | 6-3,6-2 |
| Challenger Tulln | 2021/09/05 13:00 | Matos, Rafael v Simon, Tobias | 6-7,2-6 |
| Cordenons, Italy | 2021/08/01 09:00 | Camilo Ugo Carabelli v Matos, Rafael | 4-6,7-5,6-2 |
| Challenger - Aix en Provence | 2021/06/13 11:15 | Nikolas Sanchez Izquierdo v Matos, Rafael | 6-2,6-2 |