Stadium: Court CAETANO Round: 25
| ITF Portugal F15 | 2018/08/16 09:00 | Monteiro, Joao v Hoyt, Evan | 6-7,1-6 |
| ITF Portugal F15 | 2018/08/15 10:35 | Monteiro, Joao v Goncalo Falcao | 6-4,7-6 |
| ITF Portugal F14 | 2018/08/11 11:55 | Frederico Ferreira Silva v Monteiro, Joao | 6-2,6-7,7-6 |
| ITF Portugal F14 | 2018/08/10 12:00 | Rodrigues, Pedro Gabriel v Monteiro, Joao | 0-6,0-6 |
| ITF Portugal F14 | 2018/08/09 09:00 | Eon, Julien v Monteiro, Joao | 3-6,2-6 |
| ITF Portugal F14 | 2018/08/08 11:00 | Andrea Bolla v Monteiro, Joao | 3-6,0-6 |
| Segovia, Spain | 2018/08/02 16:30 | Monteiro, Joao v Ugo Humbert | 1-6,3-6 |
| Segovia, Spain | 2018/07/31 15:45 | Heyman, Christopher v Monteiro, Joao | 4-6,4-6 |
| ITF Portugal F15 | 2018/08/12 11:30 | Rodrigues, Pedro Gabriel v Semedo, Miguel | 6-3,7-6 |
| ITF Portugal F15 | 2018/08/11 08:30 | Gabriel P Tumasonis v Semedo, Miguel | 5-7,1-6 |
| ITF Portugal F14 | 2018/08/09 10:30 | Jankovits, Yannick v Semedo, Miguel | 6-1,6-1 |
| ITF Portugal F14 | 2018/08/07 13:00 | Alexis Canter v Semedo, Miguel | 5-7,0-6 |
| ITF Portugal F14 | 2018/08/06 08:30 | Semedo, Miguel v Das, Terence | 7-5,1-6,1-6 |
| ITF Portugal F13 | 2018/07/31 10:00 | Semedo, Miguel v Mazon-Hernandez, Rafael | 2-6,7-6,5-7 |
| ITF Portugal F12 Qual | 2018/07/22 10:30 | Semedo, Miguel v Graziani, Edoardo | 2-6,0-6 |
| ITF Portugal F12 Qual | 2018/07/21 12:00 | Semedo, Miguel v Collins, Sean | 6-1,1-6,6-2 |