Stadium: Court 2 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 M25 Poznan | 2021/08/24 08:00 | Martyn Pawelski v Sebastian Brzezinski | 3-6,4-6 |
| ITF M25 Poznan | 2021/08/22 08:00 | Martyn Pawelski v Sergo Sikharulidze | 7-5,6-4 |
| ITF M15 Lodz | 2021/08/18 13:00 | Martyn Pawelski v Timo Stodder | 6-4,2-6,6-7 |
| ITF M15 Gdynia | 2021/08/11 08:00 | Roman Andres Burruchaga v Martyn Pawelski | 6-3,6-2 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/02 07:55 | Vojtech Vlkovsky v Martyn Pawelski | 6-1,7-6 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/01 08:00 | Martyn Pawelski v Lilian Breut | 6-4,3-6,10-4 |
| ITF M25 Wroclaw | 2021/06/30 13:10 | Toby Alex Kodat v Martyn Pawelski | 6-1,7-6 |
| ITF M25 Poznan | 2020/08/24 08:00 | Martyn Pawelski v Dominik Recek | 6-7,0-6 |