Stadium: Court 3 Round: 54 Ground: Clay
| ITF - Rio do Sul M25 | 2021/10/21 17:35 | Ignacio Carou v Joao Eduardo Schiessl | 6-4,6-2 |
| ITF - Rio do Sul M25 | 2021/10/19 14:55 | Joao Eduardo Schiessl v Mateus Alves | 6-4,3-6,7-6 |
| ITF - Recife M15 | 2021/09/23 13:30 | Nicolas Zanellato v Joao Eduardo Schiessl | 7-5,6-0 |
| ITF - Recife M15 | 2021/09/22 14:10 | Joao Eduardo Schiessl v Ignacio Carou | 0-6,6-2,7-6 |
| ITF - Medellin M25 | 2021/09/12 15:00 | Pedro Sakamoto v Joao Eduardo Schiessl | 6-2,6-1 |
| ITF - Ibague M15 | 2021/09/05 15:00 | Joao Eduardo Schiessl v Juan Sebastian Osorio | 4-6,6-2,4-10 |
| ITF - Quinta Do Lago M25 | 2021/10/17 10:00 | Goncalo Falcao v Paulo A S Dos Santos | 6-1,6-4 |
| ITF - Loule M25 | 2021/10/10 13:00 | Paulo A S Dos Santos v Miguel Gomes | 5-7,1-6 |
| ITF - Setubal M25 | 2021/10/06 14:15 | Illia Stoliar v Paulo A S Dos Santos | 1-6,6-1,7-6 |
| ITF - Setubal M25 | 2021/10/05 11:20 | Alberto Morolli v Paulo A S Dos Santos | 6-4,1-6,6-10 |
| ITF - Setubal M25 | 2021/10/04 10:00 | Martim Simoes v Paulo A S Dos Santos | 2-6,6-4,8-10 |
| ITF - Sintra M25 | 2021/09/06 13:30 | Paulo A S Dos Santos v Henrik Heise Korsgaard | 7-5,5-7,6-10 |
| ITF - Sintra M25 | 2021/09/05 12:00 | Paulo A S Dos Santos v Illia Stoliar | 6-2,6-2 |
| ITF - Oldenzaal M15 | 2021/08/15 07:30 | Jarno Jans v Paulo A S Dos Santos | 7-5,6-1 |