| ITF Portugal F18 | 2018/09/22 13:00 | Eduardo Morais v Illia Stoliar | 6-4,6-7,4-6 |
| ITF Portugal F17 | 2018/09/15 09:30 | Danail Banov v Illia Stoliar | 3-6,6-2,6-3 |
| ITF Portugal F16 | 2018/08/18 08:30 | Nicolas Alvarez Varona v Illia Stoliar | 6-1,6-1 |
| ITF Portugal F14 | 2018/08/05 07:00 | Illia Stoliar v Eduardo Morais | 5-7,3-6 |
| ITF Portugal F14 | 2018/08/04 10:00 | Illia Stoliar v Bernardo A P E Oliveira | 4-6,6-4,7-5 |
| ITF Portugal F13 | 2018/07/28 08:30 | Illia Stoliar v Egill Sigurdsson | 2-6,0-6 |
| ITF Portugal F11 Qual | 2018/06/30 08:30 | Illia Stoliar v Henrique Brancal | 6-4,3-6,6-7 |
| ITF Portugal F10 | 2018/06/24 12:00 | Alexander Donski v Illia Stoliar | 6-2,6-4 |
| 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 Brazil F2 | 2018/04/29 15:00 | Alex Blumenberg v Igor Sao Thiago | 6-4,5-7,6-4 |
| ITF Brazil F1 | 2018/04/22 15:30 | Gustavo De O Cruz v Igor Sao Thiago | 6-4,5-7,6-1 |
| ITF Portugal F8 | 2018/04/18 12:10 | Igor Sao Thiago v Miliaan Niesten | 1-6,3-6 |