Stadium: Court 17 Round: 26 Ground: Clay
| ITF M25 Aparecida De Goiania | 2021/11/09 16:30 | Nicolas Zanellato v Lucas Obeid | 6-0,6-2 |
| ITF M15 Brasilia | 2021/11/03 18:00 | Mateo Barreiros Reyes v Nicolas Zanellato | 7-6,2-6,6-4 |
| ITF M25 Rio do Sul | 2021/10/22 13:50 | Gustavo Heide v Nicolas Zanellato | 6-2,3-6,7-6 |
| ITF M25 Rio do Sul | 2021/10/21 16:10 | Nicolas Zanellato v Oscar Jose Gutierrez | 6-7,6-1,6-1 |
| ITF M25 Rio do Sul | 2021/10/20 16:30 | Nicolas Zanellato v Caio Gruber | 6-2,6-1 |
| ITF M15 Recife | 2021/09/24 15:25 | Eduardo Ribeiro v Nicolas Zanellato | 6-4,6-7,6-3 |
| ITF M15 Recife | 2021/09/23 13:30 | Nicolas Zanellato v Joao Eduardo Schiessl | 7-5,6-0 |
| ITF M15 Recife | 2021/09/22 17:40 | Daniel V C Rebelo v Nicolas Zanellato | 0-6,1-6 |
| ITF M25 Aparecida De Goiania | 2021/11/09 15:35 | Fernando Yamacita v Matias Zukas | 2-6,1-6 |
| Challenger Guayaquil | 2021/10/31 18:30 | Murkel Dellien v Matias Zukas | 6-3,6-2 |
| ITF M25 Guayaquil | 2021/10/29 15:00 | Juan Bautista Torres v Matias Zukas | 6-7,6-4,7-6 |
| ITF M25 Guayaquil | 2021/10/28 17:40 | Miguel L Sicco v Matias Zukas | 0-6,0-6 |
| ITF M25 Guayaquil | 2021/10/26 17:05 | Santiago Padilla Cote v Matias Zukas | 1-6,2-6 |
| Challenger Bogota | 2021/10/18 20:00 | Matias Zukas v Roberto Quiroz | 4-6,6-7 |
| Challenger Ambato | 2021/09/24 17:45 | Juan Pablo Varillas v Matias Zukas | 6-2,6-4 |
| Challenger Ambato | 2021/09/21 15:00 | Matias Zukas v Renzo Olivo | 6-4,5-7,6-4 |