Stadium: COURT 1 Round: 26 Ground: Clay
| ITF Belgium F6 | 2018/08/01 15:00 | Clement Geens v Benjamin Pietri | 6-2,6-3 |
| ITF Belgium F3 | 2018/07/03 11:00 | Clement Geens v Samm Butler | 3-6,6-3,7-5 |
| ITF Netherlands F1 | 2018/07/01 13:00 | Clement Geens v Botic Van De Zandschulp | 3-6,7-6,6-1 |
| ITF Netherlands F1 | 2018/06/30 13:25 | Clement Geens v Stephan Gerritsen | 7-5,6-4 |
| ITF Netherlands F1 | 2018/06/29 13:00 | Stephan Fransen v Clement Geens | 3-6,3-6 |
| ITF Netherlands F1 | 2018/06/28 15:40 | Luca Gelhardt v Clement Geens | 4-6,3-6 |
| ITF Netherlands F1 | 2018/06/26 15:10 | Michiel de Krom v Clement Geens | 1-6,3-6 |
| ITF Belgium F1 | 2018/06/23 14:00 | Marvin Netuschil v Clement Geens | 7-6,6-1 |
| ITF Belgium F5 | 2018/07/25 12:10 | Maxime Pauwels v Colin Sinclair | 7-6,4-6,6-4 |
| ITF Belgium F5 | 2018/07/24 14:00 | Colin Sinclair v Gabriel Donev | 6-3,6-4 |
| ITF Belgium F4 | 2018/07/18 12:55 | Jeremy Sonkin v Colin Sinclair | 7-6,7-5 |
| ITF Belgium F4 | 2018/07/17 13:10 | Colin Sinclair v Zizou Bergs | 0-6,7-5,6-3 |
| ITF Netherlands F3 | 2018/07/07 09:30 | Colin Sinclair v Ilco Van Buuren | 6-2,6-2 |
| ITF Netherlands F3 | 2018/07/07 08:00 | Colin Sinclair v Alban Meuffels | 2-6,4-6 |
| Davis Cup | 2018/04/04 11:50 | Colin Sinclair v Christian Didier Chin | 3-6,2-6 |
| ITF Thailand F12 | 2017/12/12 10:00 | Colin Sinclair v Daniel Altmaier | 3-6,5-7 |