| Challenger - Guayaquil | 2021/10/31 16:00 | Juan A H Serrano v Alejandro Gonzalez | 0-6,2-6 |
| ITF - M25 Guayaquil | 2021/10/29 15:00 | Juan A H Serrano v Facundo Juarez | 3-6,4-6 |
| ITF - M25 Guayaquil | 2021/10/28 18:35 | Juan A H Serrano v Gonzalo Achondo | 6-0,6-1 |
| ITF - M25 Guayaquil | 2021/10/26 15:00 | Juan A H Serrano v Felipe Santamaria | 6-1,6-3 |
| Challenger - Bogota | 2021/10/17 18:10 | Luca Castelnuovo v Juan A H Serrano | 6-4,6-2 |
| ITF - M15 Cancun | 2021/10/09 15:00 | Juan A H Serrano v Christian Langmo | 6-3,3-6,6-7 |
| ITF - M15 Cancun | 2021/10/07 16:25 | Juan A H Serrano v Giles Hussey | 4-6,6-2,6-3 |
| ITF - M15 Cancun | 2021/10/06 16:30 | Mwendwa Mbithi v Juan A H Serrano | 3-6,2-6 |