Stadium: Court 15 Round: 26 Ground: Clay
| ITF M25 Aparecida De Goiania | 2021/11/09 17:10 | Daniel Dutra Da Silva v Joao M Nusdeo | 6-1,6-3 |
| Challenger Guayaquil | 2021/11/05 00:00 | Nicolas Kicker v Daniel Dutra Da Silva | 7-6,6-3 |
| Challenger Guayaquil | 2021/11/02 19:25 | Daniel Dutra Da Silva v Nick Hardt | 2-6,7-6,6-0 |
| Challenger Guayaquil | 2021/11/01 18:30 | Daniel Dutra Da Silva v Murkel Dellien | 7-6,6-4 |
| Challenger Guayaquil | 2021/10/31 21:00 | Oliver Crawford v Daniel Dutra Da Silva | 4-6,3-6 |
| ITF M25 Guayaquil | 2021/10/31 15:00 | Daniel Dutra Da Silva v Facundo Juarez | 6-7,3-6 |
| ITF M25 Guayaquil | 2021/10/29 17:05 | Daniel Dutra Da Silva v Paul Valsecchi | 6-1,6-1 |
| ITF M25 Guayaquil | 2021/10/28 15:00 | Daniel Dutra Da Silva v Angel Diaz Jalil | 6-4,6-2 |
| 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 |
| ITF M25 Setubal | 2021/10/05 11:20 | Alberto Morolli v Paulo A S Dos Santos | 6-4,1-6,6-10 |
| ITF M25 Setubal | 2021/10/04 10:00 | Martim Simoes v Paulo A S Dos Santos | 2-6,6-4,8-10 |