Stadium: Court 1 Round: 26 Ground: Clay
| ITF Portugal F12 | 2018/07/27 14:00 | Mate Valkusz v Tiago Cacao | 6-2,6-4 |
| ITF Portugal F12 | 2018/07/26 14:30 | Gabriel Ciro Da Silva v Tiago Cacao | 3-6,1-6 |
| ITF Portugal F12 | 2018/07/25 17:55 | Francisco Cabral v Tiago Cacao | 6-4,3-6,1-6 |
| ITF Portugal F11 | 2018/07/04 08:30 | Mark Whitehouse v Tiago Cacao | 6-3,6-4 |
| ITF Portugal F10 | 2018/07/01 10:00 | Baptiste Crepatte v Tiago Cacao | 6-2,7-5 |
| ITF Portugal F10 | 2018/06/30 10:00 | Nuno Borges v Tiago Cacao | 4-6,2-6 |
| ITF Portugal F10 | 2018/06/29 12:00 | Tiago Cacao v Fred Gil | 4-6,6-3,6-1 |
| ITF Portugal F10 | 2018/06/28 10:30 | Tiago Cacao v Wilfredo Gonzalez | 6-4,6-3 |
| ITF Portugal F13 | 2018/07/31 10:00 | Goncalo Falcao v Guilherme W Osorio | 1-6,2-6 |
| ITF Portugal F11 | 2018/07/04 14:15 | Pablo Vivero Gonzalez v Guilherme W Osorio | 5-7,6-2,6-4 |
| ITF Portugal F11 Qual | 2018/07/03 08:30 | Elio Jose Ribeiro Lago v Guilherme W Osorio | 4-6,2-6 |
| ITF Portugal F11 Qual | 2018/07/02 11:00 | Maximiliano R-Mayorga v Guilherme W Osorio | 2-6,1-6 |
| ITF Portugal F10 | 2018/06/25 09:30 | Alexander Donski v Guilherme W Osorio | 2-6,7-5,6-4 |
| 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 |