Round: 44 Ground: Clay
| 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 Italy F13 | 2018/06/03 08:00 | Guillaume Dermiens v Kristjan Tamm | 1-6,4-6 |
| ITF Italy F13 | 2018/06/02 07:30 | Guillaume Dermiens v Michelangelo Endrizzi | 6-4,6-3 |
| ITF Portugal F4 | 2018/03/12 10:00 | Guillaume Dermiens v Lucas Hellfritsch | View |
| ITF Portugal F4 | 2018/03/11 11:30 | Igor Marcondes v Guillaume Dermiens | 6-7,7-6,2-6 |
| ITF Portugal F3 | 2018/03/04 12:00 | Antonio P Neto v Guillaume Dermiens | 7-6,6-4 |
| ITF Spain F4 | 2018/02/04 09:00 | Alexander Igoshin v Aloys J W Van Baal | 6-1,7-5 |
| ITF Spain F4 | 2018/02/03 12:00 | Sidane Pontjodikromo v Aloys J W Van Baal | 4-6,3-6 |
| ITF Spain F3 | 2018/01/28 13:00 | Sergio Martos Gornes v Aloys J W Van Baal | 6-0,6-4 |
| ITF Spain F3 | 2018/01/27 14:00 | Lazar Vojinovic v Aloys J W Van Baal | 6-3,0-6,2-6 |