Stadium: Court 3 Round: 62 Ground: Hardcourt outdoor
| ITF Portugal F10 | 2018/06/24 12:00 | Alexander Donski v Illia Stoliar | 6-2,6-4 |
| ITF Portugal F9 | 2018/06/18 10:30 | Duarte Vale v Alexander Donski | 6-3,7-5 |
| ITF Portugal F9 | 2018/06/17 11:30 | Alexander Donski v Tiago Torres | 6-3,6-7,6-3 |
| ITF Portugal F9 | 2018/06/16 13:00 | Alexander Donski v Russell Henderson | 2-6,6-4,6-4 |
| ITF Bulgaria F1 | 2018/05/16 07:00 | Lucas Catarina v Alexander Donski | 6-2,6-2 |
| ITF Greece F5 | 2018/03/27 09:00 | Domagoj Biljesko v Alexander Donski | 6-3,4-6,7-5 |
| ITF Greece F4 | 2018/03/18 09:30 | Alexander Donski v Jannik Sinner | 4-6,5-7 |
| ITF Greece F4 | 2018/03/17 07:30 | Michael Vrbensky v Alexander Donski | 6-7,6-7 |
| ITF Portugal F10 | 2018/06/24 12:00 | Manuel Luis Lamelas v Guilherme W Osorio | 1-6,0-6 |
| ITF Portugal F10 | 2018/06/23 15:00 | Renato Van Veggel v Guilherme W Osorio | 1-6,1-6 |
| ITF USA F31 | 2017/09/20 20:45 | Samir Iftikhar v Guilherme W Osorio | 2-6,1-6 |
| ITF USA F31 | 2017/09/20 20:00 | Samir Iftikhar v Guilherme W Osorio | 2-6,1-6 |
| ITF USA F31 | 2017/09/18 18:00 | Guilherme W Osorio v Pol Wattanakul | 6-2,6-0 |
| ITF USA F31 | 2017/09/17 19:00 | Guilherme W Osorio v Luis Humberto Lopez | 6-1,6-4 |
| ITF Portugal F16 | 2017/08/14 09:00 | Guilherme W Osorio v Ryan Peniston | 3-6,1-6 |
| ITF Portugal F16 | 2017/08/13 10:00 | Simon Carr v Guilherme W Osorio | 4-6,5-7 |