Round: 44 Ground: Clay
| 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 F10 | 2018/06/23 12:00 | Danail Banov v Illia Stoliar | 4-6,4-6 |
| ITF Portugal F6 Qual | 2018/03/25 09:00 | Sebastien Boltz v Illia Stoliar | 6-1,6-0 |
| ITF Portugal F2 Qual | 2018/02/25 13:00 | Diego A B Sanchez v Illia Stoliar | 6-2,6-2 |
| ITF Portugal F17 | 2017/08/19 08:30 | Illia Stoliar v Felipe Muzzi | 1-6,0-6 |
| ITF Portugal F16 | 2017/08/12 10:00 | Elliott Orkin v Illia Stoliar | 6-1,6-1 |
| ITF Portugal F10 | 2017/07/03 10:00 | Julian Contzen v Illia Stoliar | 6-2,6-2 |
| ITF Portugal F12 Qual | 2018/07/22 09:00 | Gabriel Ciro Da Silva v Egill Sigurdsson | 6-2,6-0 |
| ITF Portugal F11 Qual | 2018/07/01 09:00 | Luis Faria v Egill Sigurdsson | 6-3,6-0 |
| ITF Portugal F10 | 2018/06/23 12:00 | Egill Sigurdsson v Afonso Salgado | 0-6,1-6 |
| ITF Tunisia F22 | 2018/06/02 14:00 | Egill Sigurdsson v Luigi Sorrentino | 1-6,1-6 |
| ITF Tunisia F20 | 2018/05/19 09:00 | Egill Sigurdsson v Philip Sikman | 3-6,5-7 |
| ITF Spain F11 | 2018/05/12 11:30 | Kuzey Cekirge v Egill Sigurdsson | 6-4,6-3 |
| Davis Cup | 2018/04/06 08:00 | Egill Sigurdsson v Genajd Shypheja | 6-1,6-1 |
| Davis Cup | 2018/04/05 08:00 | Alexander Lazov v Egill Sigurdsson | 6-1,6-1 |