Stadium: Court 1 Round: 26 Ground: Hardcourt outdoor
| ITF M25 Setubal | 2021/10/06 14:15 | Illia Stoliar v Paulo A S Dos Santos | 1-6,6-1,7-6 |
| ITF M25 Setubal | 2021/10/05 12:15 | Goncalo Falcao v Illia Stoliar | 4-6,6-4,6-10 |
| ITF M25 Setubal | 2021/10/04 12:10 | Cameron Price v Illia Stoliar | 1-6,1-6 |
| ITF M25 Sintra | 2021/09/13 16:20 | Mirko Lagasio v Illia Stoliar | 6-4,6-4 |
| ITF M25 Sintra | 2021/09/05 12:00 | Paulo A S Dos Santos v Illia Stoliar | 6-2,6-2 |
| ITF M15 Castelo Branco | 2021/07/25 16:00 | Illia Stoliar v Andre Rodeia | 7-6,5-7,6-10 |
| ITF M25 Idanha-A-Nova | 2021/07/19 12:50 | Illia Stoliar v Daniel Little | 2-6,4-6 |
| ITF M25 Idanha-A-Nova | 2021/07/18 13:00 | Andre Stewart v Illia Stoliar | 5-7,3-6 |
| ITF M25 Setubal | 2021/10/06 10:00 | Jumpei Yamasaki v Sebastian Fanselow | 6-4,4-6,4-6 |
| Challenger Lisbon | 2021/09/28 09:00 | Sebastian Fanselow v Nikola Milojevic | 4-6,4-6 |
| Challenger Lisbon | 2021/09/27 09:00 | Jacopo Berrettini v Sebastian Fanselow | 6-4,5-7,2-6 |
| Challenger Lisbon | 2021/09/26 09:00 | Marco Bortolotti v Sebastian Fanselow | 2-6,2-6 |
| Challenger Braga | 2021/09/20 09:00 | Nikolas Sanchez Izquierdo v Sebastian Fanselow | 6-4,1-6,6-3 |
| Challenger Braga | 2021/09/19 10:25 | Jaime Faria v Sebastian Fanselow | 0-6,2-6 |
| ITF M25 Sintra | 2021/09/15 15:35 | Adria Soriano Barrera v Sebastian Fanselow | 6-4,6-4 |
| ITF M25 Sintra | 2021/09/08 10:40 | Luca Potenza v Sebastian Fanselow | 6-4,6-4 |