Estadio: Court 2 Round: 25
| ITF M25 Portoviejo | 2021/07/29 14:25 | Antonio Cayetano March v Juan A H Serrano | 6-3,7-6 |
| ATP Los Cabos | 2021/07/18 00:00 | Juan A H Serrano v Nicolas Mejia | 3-6,6-3,5-7 |
| ITF M25 Santo Domingo | 2021/06/12 13:30 | Igor Marcondes v Juan A H Serrano | 7-5,2-6,7-5 |
| ITF M25 Santo Domingo | 2021/06/11 13:30 | Conner Huertas Del Pino v Juan A H Serrano | 3-6,5-7 |
| ITF M25 Santo Domingo | 2021/06/08 19:45 | Juan A H Serrano v Rowland Phillips | 6-1,3-6,10-8 |
| ITF M25 Santo Domingo | 2021/06/01 13:00 | Juan A H Serrano v Sergio Luis H Ramirez | 6-4,6-3 |
| ITF M25 Pensacola | 2021/05/20 14:25 | Juan A H Serrano v Alejandro Gonzalez | 3-6,2-6 |
| ITF M25 Pensacola | 2021/05/18 16:05 | Juan A H Serrano v Abraham Asaba | 6-1,6-2 |
| ITF M25 Portoviejo | 2021/07/31 15:00 | Nicolas Alvarez v Arklon H D Pino | 1-6,4-6 |
| ITF M25 Portoviejo | 2021/07/30 14:30 | Nicolas Alvarez v José Pereira | 7-6,6-3 |
| ITF M25 Portoviejo | 2021/07/29 16:35 | Nicolas Alvarez v Noah Schachter | 6-2,6-2 |
| ITF M25 Tulsa | 2021/06/17 01:55 | Ezekiel Clark v Nicolas Alvarez | 6-4,6-2 |
| Challenger Orlando | 2021/06/07 14:00 | Nicolas Mejia v Nicolas Alvarez | 6-3,7-5 |
| Challenger Orlando | 2021/06/06 16:20 | Strong Kirchheimer v Nicolas Alvarez | 3-6,5-7 |
| Challenger de Oeiras | 2021/05/23 11:35 | Nicolas Alvarez v Timofey Skatov | 3-6,2-6 |
| ITF M25 Vic | 2021/05/18 09:50 | Nicolas Alvarez v Maxime Hamou | 6-4,0-6,6-7 |