Stadium: Court 4 Round: 44 Ground: Clay
| ITF M15 - Huy | 2021/08/23 11:35 | Guillaume Dermiens v Charles Tzicas | 6-3,6-0 |
| ITF M15 - Huy | 2021/08/22 13:10 | Guillaume Dermiens v Cedric Stanke | 6-3,6-1 |
| ITF M25 - Koksijde | 2021/08/17 08:00 | Guillaume Dermiens v Francesco Passaro | 2-6,1-6 |
| ITF M25 - Koksijde | 2021/08/16 11:50 | Guillaume Dermiens v Alen Moritz Hodzic | 6-4,6-3 |
| ITF M15 - Esch/Alzette | 2021/07/21 14:25 | Guillaume Dermiens v Patrick Kypson | 1-6,3-6 |
| ITF M15 - Esch/Alzette | 2021/07/20 12:55 | Guillaume Dermiens v Raphael Calzi | 1-6,6-4,6-4 |
| ITF M15 - Esch/Alzette | 2021/07/19 09:00 | Lucas Szewczyk v Guillaume Dermiens | 3-6,2-6 |
| ITF M15 - Esch/Alzette | 2021/07/18 14:25 | Floris Podzimek v Guillaume Dermiens | 3-6,1-6 |
| ITF M15 - Huy | 2021/08/23 15:05 | Thorsten Sollie v Leon Hoeveler | 6-4,7-5 |
| ITF M15 - Huy | 2021/08/22 15:50 | Thorsten Sollie v Jurriaan Bol | 3-6,6-2,10-2 |
| ITF Germany F15 | 2018/10/08 08:00 | Piotr Grynkowski v Thorsten Sollie | 7-5,7-5 |
| ITF Belgium F10 Qual | 2018/08/26 08:00 | Julien De Cuyper v Thorsten Sollie | 6-2,7-5 |
| ITF Netherlands F5 | 2018/08/18 08:00 | Thorsten Sollie v Zachary Eisinga | 4-6,6-4,4-6 |
| ITF Netherlands F3 | 2018/07/07 10:00 | Baptiste Anselmo v Thorsten Sollie | 6-1,7-5 |
| ITF Netherlands F2 Qual | 2018/07/01 08:00 | Valentin Guenther v Thorsten Sollie | 7-6,6-7,6-4 |
| ITF Netherlands F2 Qual | 2018/06/30 09:30 | Thorsten Sollie v Nicolas Zaidman | 6-3,7-5 |