Round: 44 Ground: Clay
| 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 Portugal F2 Qual | 2018/02/24 10:00 | Guillaume Dermiens v Martim L Prata | 5-7,6-3,4-6 |
| ITF Turkey F43 | 2017/11/11 08:30 | Guillaume Dermiens v Moritz Trocker | 2-6,6-7 |
| ITF Turkey F38 | 2017/10/07 07:00 | Guillaume Dermiens v Jakob Johansson-Holm | 1-6,4-6 |
| ITF Turkey F37 | 2017/10/01 09:00 | Guillaume Dermiens v Philipp Schroll | 5-7,2-6 |
| ITF Turkey F36 | 2017/09/23 07:30 | Durukan Durmus v Guillaume Dermiens | 3-6,6-4,6-1 |
| ITF Chile F3 | 2017/12/02 14:00 | Javier Naser v Joaquin P M Bannen | 6-3,6-0 |