Stadium: Clay 6 Round: 62 Ground: Clay
| ITF Turkey F29 | 2018/09/22 09:30 | Jonathan Van Nieuwenhove v Kayra Kargin | 6-0,6-3 |
| ITF Belgium F10 Qual | 2018/08/25 08:00 | Jonathan Van Nieuwenhove v Liam Dielen | 6-2,5-7,3-6 |
| ITF Belgium F4 | 2018/07/15 08:30 | Jonathan Van Nieuwenhove v Nicolas Zaidman | 4-6,0-6 |
| ITF Belgium F4 | 2018/07/14 10:45 | Francisco Dias v Jonathan Van Nieuwenhove | 5-7,7-5,4-6 |
| ITF Belgium F4 | 2018/07/14 07:00 | Jonathan Van Nieuwenhove v Louis Van Herck | 7-6,6-3 |
| ITF Tunisia F25 | 2018/06/23 08:00 | Diego F Flores v Jonathan Van Nieuwenhove | 7-5,5-7,7-5 |
| ITF Germany F4 | 2018/06/17 12:00 | Kai Wehnelt v Jonathan Van Nieuwenhove | 6-2,6-3 |
| ITF Germany F4 | 2018/06/16 08:00 | Marek Flinner v Jonathan Van Nieuwenhove | 6-7,4-6 |
| ITF Turkey F29 | 2018/09/22 07:00 | Jordi Walder v Thomas Schwencke Lindqvist | 6-2,6-1 |
| ITF Turkey F28 | 2018/09/20 09:10 | Jordi Walder v Mathieu Perchicot | 4-6,2-6 |
| ITF Turkey F28 | 2018/09/18 09:10 | Jordi Walder v Shahin Khaledan | 6-4,6-2 |
| ITF Turkey F28 | 2018/09/16 07:30 | Sebastian Prechtel v Jordi Walder | 3-6,3-6 |
| ITF Romania F13 | 2018/09/09 10:00 | Jordi Walder v Samuele Ramazzotti | 0-6,2-6 |
| ITF Germany F13 | 2018/08/22 08:00 | Peter Heller v Jordi Walder | 7-6,6-3 |
| ITF Germany F13 | 2018/08/20 09:00 | Kai Lemstra v Jordi Walder | 3-6,6-1,3-6 |
| ITF Germany F13 | 2018/08/19 08:00 | Jim Walder v Jordi Walder | 0-6,6-2,1-6 |