| ITF M25 Aparecida De Goiania | 2021/11/09 13:10 | Mateo Barreiros Reyes v Paulo A S Dos Santos | 6-7,4-6 |
| ITF M25 Villa Allende | 2021/11/29 12:30 | Santiago Franchini v Mateo Barreiros Reyes | 7-6,6-4 |
| ITF M15 Cordoba | 2021/11/24 14:30 | Mateo Barreiros Reyes v Juan Bautista Torres | 4-6,2-6 |
| ITF M15 Cordoba | 2021/11/23 13:00 | Franco Roncadelli v Mateo Barreiros Reyes | 6-4,4-6,12-14 |
| ITF M15 Cordoba | 2021/11/22 12:00 | Tobias Franco v Mateo Barreiros Reyes | 3-6,3-6 |
| ITF M15 Cordoba | 2021/11/21 12:00 | Gonzalo Zeitune v Mateo Barreiros Reyes | 1-6,0-6 |
| ITF M25 Aparecida De Goiania | 2021/11/09 13:10 | Mateo Barreiros Reyes v Paulo A S Dos Santos | 6-7,4-6 |
| ITF M25 Aparecida De Goiania | 2021/11/08 16:00 | Gabriel Batagin v Mateo Barreiros Reyes | 3-6,2-6 |
| ITF M25 Aparecida De Goiania | 2021/11/07 17:00 | Gustavo Teisen Pereira v Mateo Barreiros Reyes | 4-6,2-6 |
| Challenger Brasilia | 2021/11/21 14:35 | Luciano Darderi v Paulo A S Dos Santos | 6-2,6-3 |
| ITF M25 Aparecida De Goiania | 2021/11/11 19:15 | Daniel Dutra Da Silva v Paulo A S Dos Santos | 5-7,6-3,6-1 |
| ITF M25 Aparecida De Goiania | 2021/11/09 13:10 | Mateo Barreiros Reyes v Paulo A S Dos Santos | 6-7,4-6 |
| ITF M25 Aparecida De Goiania | 2021/11/08 14:30 | Tobias Franco v Paulo A S Dos Santos | 6-4,1-6,2-10 |
| ITF M15 Brasilia | 2021/11/02 12:00 | Joao Eduardo Schiessl v Paulo A S Dos Santos | 6-1,7-5 |
| ITF M25 Quinta Do Lago | 2021/10/17 10:00 | Goncalo Falcao v Paulo A S Dos Santos | 6-1,6-4 |
| ITF M25 Loule | 2021/10/10 13:00 | Paulo A S Dos Santos v Miguel Gomes | 5-7,1-6 |
| ITF M25 Setubal | 2021/10/06 14:15 | Illia Stoliar v Paulo A S Dos Santos | 1-6,6-1,7-6 |