Stadium: Court 9 Round: 62 Ground: Clay
| ITF Belgium F3 Qual | 2018/07/01 08:00 | Guillaume Dermiens v Ian O'Jon | 6-2,6-2 |
| ITF Belgium F3 Qual | 2018/06/30 07:30 | Jeremy Sonkin v Guillaume Dermiens | 4-6,4-6 |
| ITF Netherlands F1 | 2018/06/26 10:35 | Mats Hermans v Guillaume Dermiens | 7-6,4-6,6-4 |
| ITF Netherlands F1 Qual | 2018/06/25 10:50 | Niels Lootsma v Guillaume Dermiens | 4-6,6-7 |
| ITF Netherlands F1 Qual | 2018/06/24 09:00 | Guillaume Dermiens v Aloys J W Van Baal | 6-2,6-2 |
| ITF Netherlands F1 Qual | 2018/06/23 08:00 | Guillaume Dermiens v Stefan Loncar | 6-2,6-3 |
| ITF Belgium F1 Qual | 2018/06/17 08:00 | Guillaume Dermiens v Quentin Folliot | 1-6,6-7 |
| ITF Belgium F1 Qual | 2018/06/16 08:00 | Guillaume Dermiens v Charles Tzicas | 6-4,6-3 |
| ITF Belgium F3 Qual | 2018/07/01 08:00 | Rodrigo Garcia v Luke Vandecasteele | 3-6,4-6 |
| ITF Belgium F3 Qual | 2018/06/30 07:30 | Luke Vandecasteele v Jeremy De Bodt | 6-1,6-4 |