Stadium: Quadra Central Round: 25 Ground: Clay
| ITF M25 Rio do Sul | 2021/10/24 16:10 | Pedro Boscardin Dias v Gustavo Heide | 7-6,6-4 |
| ITF M25 Rio do Sul | 2021/10/23 16:00 | Pedro Boscardin Dias v Facundo Juarez | 6-3,6-4 |
| ITF M25 Rio do Sul | 2021/10/22 14:20 | Pedro Boscardin Dias v Marcelo Zormann | 6-3,5-7,6-3 |
| ITF M25 Rio do Sul | 2021/10/21 14:50 | Gilbert S K Junior v Pedro Boscardin Dias | 6-2,3-6,2-6 |
| ITF M25 Rio do Sul | 2021/10/20 17:05 | Pedro Boscardin Dias v Gabriel Roveri Sidney | 6-4,6-2 |
| ITF M15 Recife | 2021/09/25 16:00 | Pedro Boscardin Dias v Jose Pereira | 6-7,3-6 |
| ITF M15 Recife | 2021/09/24 14:00 | Pedro Boscardin Dias v Wilson Leite | 7-6,7-6 |
| ITF M15 Recife | 2021/09/23 13:30 | Pedro Boscardin Dias v Enrique Bogo | 7-6,6-1 |
| Challenger Sao Paulo | 2021/11/30 16:55 | Facundo Diaz Acosta v Gonzalo Villanueva | 7-5,6-1 |
| Challenger Sao Paulo | 2021/11/29 15:05 | Gonzalo Villanueva v Alejandro Gomez | 6-4,7-6 |
| Challenger Sao Paulo | 2021/11/28 13:00 | Gonzalo Villanueva v Tomas Lipovsek Puches | 3-6,6-3,6-1 |
| Challenger Brasilia | 2021/11/21 14:35 | Gonzalo Villanueva v Luca Castelnuovo | 6-7,6-3,3-6 |
| Challenger Campinas | 2021/11/14 16:00 | Hernan Casanova v Gonzalo Villanueva | 7-6,4-6,7-5 |
| Challenger Montevideo | 2021/11/09 16:00 | Facundo Bagnis v Gonzalo Villanueva | 6-1,7-6 |
| Challenger Montevideo | 2021/11/08 16:30 | Tomas Lipovsek Puches v Gonzalo Villanueva | 3-6,2-6 |
| Challenger Montevideo | 2021/11/07 18:05 | Rodrigo Arus v Gonzalo Villanueva | 1-6,0-6 |