Stadium: Campo 4 Round: 14 Ground: Clay
| ITF M25 Guayaquil | 2021/08/03 14:30 | Juan A H Serrano v Nicolas Alvarez | 6-3,3-6,6-3 |
| 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 Jose 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 Oeiras | 2021/05/23 11:35 | Nicolas Alvarez v Timofey Skatov | 3-6,2-6 |
| Challenger Todi | 2021/07/17 16:35 | Matheus P De Almeida v Mario Vilella Martinez | 6-7,6-3,1-6 |
| Challenger Todi | 2021/07/16 13:00 | Nicolas Jarry v Matheus P De Almeida | 6-3,3-6,1-6 |
| Challenger Todi | 2021/07/14 13:00 | Matheus P De Almeida v Dmitry Popko | 3-6,6-1,6-2 |
| Challenger Todi | 2021/07/13 12:45 | Filippo Baldi v Matheus P De Almeida | 6-1,4-6,1-6 |
| Challenger Todi | 2021/07/12 13:00 | Matheus P De Almeida v Federico Zeballos | 6-1,6-3 |
| Challenger Todi | 2021/07/11 09:55 | Matheus P De Almeida v Stephane Robert | 6-1,6-1 |
| ITF M25 Casinalbo | 2021/07/09 14:00 | Franco Agamenone v Matheus P De Almeida | 6-2,6-7,7-5 |
| ITF M25 Casinalbo | 2021/07/08 08:45 | Matheus P De Almeida v Francesco Maestrelli | 6-3,6-3 |