Stadium: Court 3 Round: 62 Ground: Hardcourt outdoor
| ITF M25 - Eupen | 2021/09/07 09:30 | Guillaume Dermiens v Loic Cloes | 3-6,0-6 |
| ITF M25 - Eupen | 2021/09/06 07:30 | Guillaume Dermiens v Adan Freire Da Silva | 7-6,6-1 |
| ITF M25 - Eupen | 2021/09/05 09:00 | Guillaume Dermiens v Gosse Panagoulopoulos | 6-2,6-2 |
| ITF M15 - Huy | 2021/08/24 09:20 | Guillaume Dermiens v Thorsten Sollie | 4-6,3-6 |
| 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 - Monastir | 2021/11/07 08:30 | Alessandro Coccioli v Josh Reid | 7-5,6-2 |
| ITF - M15 - Monastir | 2021/08/30 11:00 | Yuta Kawahashi v Alessandro Coccioli | 6-0,6-2 |
| ITF - M15 - Monastir | 2021/08/29 10:30 | Syed Mohd Agil Syed Naguib v Alessandro Coccioli | 6-0,0-6,5-10 |