Stadium: Court 5 Round: 44 Ground: Clay
| ITF Spain F13 | 2018/05/27 08:00 | Dias, Francisco v Pol Martin Tiffon | 4-6,1-6 |
| ITF Spain F13 | 2018/05/26 07:00 | Dias, Francisco v Fernandez, Pol | 6-4,6-4 |
| ITF Spain F12 | 2018/05/19 07:00 | Dias, Francisco v Fillat Gimenez, Oriol | 3-6,3-6 |
| Challenger Lisbon Qual | 2018/05/12 14:00 | Dias, Francisco v Galarza, Juan Ignacio | 4-6,2-6 |
| Challenger Braga Qual | 2018/05/05 09:00 | Dias, Francisco v Leote Prata, Martim | 4-6,5-7 |
| ITF Spain F10 Qual | 2018/04/22 14:00 | Pla Malfeito, Jaume v Dias, Francisco | 2-6,6-3,6-2 |
| ITF Spain F10 Qual | 2018/04/21 15:30 | Dias, Francisco v Dolz, Lluis | 7-5,6-2 |
| ITF Portugal F8 | 2018/04/18 15:00 | Desein, Niels v Dias, Francisco | 6-1,4-6,6-1 |
| ITF Belgium F4 | 2018/07/14 07:00 | van Nieuwenhove, Jonathan v Louis Van Herck | 7-6,6-3 |
| ITF Tunisia F25 | 2018/06/23 08:00 | Diego F Flores v van Nieuwenhove, Jonathan | 7-5,5-7,7-5 |
| ITF Germany F4 | 2018/06/17 12:00 | Kai Wehnelt v van Nieuwenhove, Jonathan | 6-2,6-3 |
| ITF Germany F4 | 2018/06/16 08:00 | Flinner, Marek v van Nieuwenhove, Jonathan | 6-7,4-6 |
| ITF Egypt F26 | 2017/09/17 15:00 | van Nieuwenhove, Jonathan v Ren Nakamura | 4-6,2-6 |
| ITF Egypt F25 | 2017/09/10 09:00 | Krivic, Ivan v van Nieuwenhove, Jonathan | 6-2,6-1 |
| ITF Belgium F7 Qual | 2017/07/29 11:00 | van Nieuwenhove, Jonathan v Boris Fassbender | 2-6,1-6 |
| ITF Belgium F6 | 2017/07/24 08:00 | Matteo Martineau v van Nieuwenhove, Jonathan | 6-1,6-3 |