| ITF Portugal F18 | 2018/09/26 11:05 | Fred Gil v Igor Sao Thiago | 6-7,6-1,6-1 |
| ITF Portugal F18 | 2018/09/24 10:55 | Joao Graca v Igor Sao Thiago | 5-7,1-6 |
| ITF Portugal F18 | 2018/09/23 13:00 | Illia Stoliar v Igor Sao Thiago | 6-4,3-6,3-6 |
| ITF Portugal F17 | 2018/09/17 14:45 | Maksim Tikhomirov v Igor Sao Thiago | 6-7,6-2,6-3 |
| ITF Brazil F4 Qual | 2018/05/14 14:50 | Enrique Bogo v Igor Sao Thiago | 6-1,2-6,6-3 |
| ITF Brazil F4 Qual | 2018/05/13 12:00 | Franco Roncadelli v Igor Sao Thiago | 5-7,3-6 |
| ITF Brazil F3 | 2018/05/07 12:30 | Felipe Garla v Igor Sao Thiago | 6-4,4-6,7-5 |
| ITF Brazil F3 | 2018/05/06 12:30 | Joao M Nusdeo v Igor Sao Thiago | 3-6,3-6 |
| ITF Peru F2 | 2018/09/29 14:30 | Joao Ferreira v Javier Araya | 6-1,6-1 |
| ITF Peru F1 | 2018/09/25 15:00 | Joao Ferreira v Mariano Kestelboim | 6-2,2-6,4-6 |
| ITF Peru F1 | 2018/09/23 15:30 | Alan Postay v Joao Ferreira | 4-6,3-6 |
| ITF Portugal F18 | 2018/09/23 10:30 | Rafael Izquierdo Luque v Joao Ferreira | 6-1,6-1 |
| ITF Peru F1 | 2018/09/22 14:30 | Joao Ferreira v Ivan R G Huerta | 6-3,6-3 |
| ITF Portugal F12 Qual | 2018/07/21 09:00 | Alvaro S-R Ariza v Joao Ferreira | 6-4,6-0 |
| ITF Portugal F11 Qual | 2018/06/30 08:30 | Joao Ferreira v Marko Vejnovic | 1-6,1-6 |
| ITF Portugal F10 | 2018/06/23 12:00 | Joao Ferreira v Tiago R Fernandes | 2-6,6-7 |