Stadium: Court 2 Round: 26 Ground: Hardcourt outdoor
| ITF Portugal F8 | 2018/04/17 12:20 | Monteiro, Joao v Saraiva, Bernardo | 6-2,6-2 |
| ITF Portugal F7 | 2018/04/12 11:00 | Igor Sijsling v Monteiro, Joao | 6-2,6-1 |
| ITF Portugal F6 | 2018/03/29 12:30 | Monteiro, Joao v Frederico Ferreira Silva | 6-7,4-6 |
| ITF Portugal F6 | 2018/03/28 11:30 | Monteiro, Joao v David Pichler | 7-5,7-6 |
| ITF Portugal F6 | 2018/03/27 14:55 | Monteiro, Joao v Neuchrist, Maximilian | 7-6,6-4 |
| ITF Portugal F5 | 2018/03/24 15:05 | Monteiro, Joao v Lloyd Harris | 3-6,4-6 |
| ITF Portugal F5 | 2018/03/23 10:00 | Monteiro, Joao v Cacao, Tiago | 6-4,6-1 |
| ITF Portugal F5 | 2018/03/22 16:25 | Monteiro, Joao v Kenneth Raisma | 6-4,6-1 |
| ITF Portugal F8 | 2018/04/18 15:00 | Desein, Niels v Dias, Francisco | 6-1,4-6,6-1 |
| ITF Italy F7 | 2018/04/11 13:45 | Desein, Niels v Andrea Collarini | 3-6,6-7 |
| ITF Italy F7 | 2018/04/09 16:20 | Desein, Niels v Ornago, Fabrizio | 6-2,6-1 |
| Challenger Alicante Qual | 2018/03/31 10:10 | Gimeno-Traver, Daniel v Desein, Niels | 3-6,6-1,6-2 |
| Challenger Lille Qual | 2018/03/19 11:05 | Desein, Niels v Antoine Escoffier | 6-3,3-6,3-6 |
| Challenger Lille Qual | 2018/03/18 12:00 | Desein, Niels v Corrie, Edward | 7-6,3-6,6-1 |
| Challenger Lille Qual | 2018/03/17 10:50 | Ward, Alexander v Desein, Niels | 6-4,3-6,4-6 |
| ITF Israel F1 | 2018/03/06 08:00 | Mercier, Tyler v Desein, Niels | 6-3,7-6 |