Stadium: Court 1 Round: 25
| ITF Portugal F18 | 2018/09/27 09:00 | Merckx, Jonas v Desein, Niels | 4-6,6-7 |
| ITF Portugal F18 | 2018/09/25 09:00 | Tchoutakian, Maxime v Merckx, Jonas | 2-6,4-6 |
| ITF Belgium F10 | 2018/08/30 09:00 | Merckx, Jonas v Sinclair, Colin | 2-6,6-4,1-6 |
| ITF Belgium F10 | 2018/08/29 07:30 | Merckx, Jonas v Carr, Simon | 7-6,4-6,6-2 |
| ITF Belgium F10 | 2018/08/28 08:00 | Merckx, Jonas v Buvaysar Gadamauri | 6-1,6-3 |
| ITF Belgium F9 | 2018/08/23 11:00 | Juan Bautista Otegui v Merckx, Jonas | 6-2,6-4 |
| ITF Belgium F9 | 2018/08/21 10:30 | Mertens, Nico v Merckx, Jonas | 2-6,2-6 |
| Meerbusch, Allemagne, Qualifications | 2018/08/11 14:35 | Nicola Kuhn v Merckx, Jonas | 7-5,6-4 |
| ITF Portugal F18 | 2018/09/25 09:00 | Maiga, Riccardo v Leote Prata, Martim | 6-2,7-5 |
| ITF Portugal F17 | 2018/09/17 14:30 | Rodrigues, Pedro Gabriel v Leote Prata, Martim | 3-6,7-6,6-2 |
| ITF Portugal F16 | 2018/08/21 10:00 | Cacao, Tiago v Leote Prata, Martim | 6-4,6-4 |
| ITF Portugal F15 | 2018/08/16 09:00 | Kanar, Jonathan v Leote Prata, Martim | 6-1,6-4 |
| ITF Portugal F15 | 2018/08/15 13:05 | Leote Prata, Martim v van Veggel, Renato | 6-2,6-3 |
| ITF Portugal F11 | 2018/07/04 09:55 | Leote Prata, Martim v Luca Castelnuovo | 6-7,3-6 |
| ITF Portugal F10 | 2018/06/27 10:30 | Leote Prata, Martim v Alexander Donski | 1-6,7-6,3-6 |
| ITF Spain F14 | 2018/06/04 12:40 | Leote Prata, Martim v Alberto Barroso Campos | 1-6,0-6 |