Stadium: Court 13 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Oldenzaal | 2021/08/15 07:30 | Jans, Jarno v Paulo A S Dos Santos | 7-5,6-1 |
| ITF M15 Xativa | 2021/08/01 13:00 | Paulo A S Dos Santos v Alexis Boureau | 2-6,3-6 |
| ITF M15 Castelo Branco | 2021/07/26 08:30 | Clement Chidekh v Paulo A S Dos Santos | 7-6,6-1 |
| ITF M15 Cordoba | 2021/04/07 13:30 | Paulo A S Dos Santos v Lucio Carnevalle | 1-6,2-6 |
| ITF M15 Cordoba | 2021/04/06 13:00 | Paulo A S Dos Santos v Gimenez, J. | 7-6,3-6,12-10 |
| ITF M15 Cordoba | 2021/04/05 14:00 | Paulo A S Dos Santos v Ezequiel Simonit | 3-6,6-1,10-8 |
| ITF M15 Cordoba | 2021/04/04 12:30 | Roman Andres Burruchaga v Paulo A S Dos Santos | 6-1,5-7,6-10 |
| ITF - M15 Villa Maria | 2021/03/29 12:30 | Ignacio Carou v Paulo A S Dos Santos | 6-0,6-1 |
| ITF M15 Castelo Branco | 2021/07/25 16:00 | Stoliar, Illia v Rodeia, Andre | 7-6,5-7,6-10 |
| ITF M25 Idanha-A-Nova | 2021/07/19 12:50 | Stoliar, Illia v Daniel Little | 2-6,4-6 |
| ITF M25 Idanha-A-Nova | 2021/07/18 13:00 | Andre Stewart v Stoliar, Illia | 5-7,3-6 |
| ITF M25 Idanha-A-Nova | 2021/07/13 10:25 | Rodrigues, Daniel v Stoliar, Illia | 2-6,6-4,11-9 |
| ITF M25 Idanha-A-Nova | 2021/07/12 15:15 | Bruno Ouvidor v Stoliar, Illia | 2-6,1-6 |
| ITF M25 Idanha-A-Nova | 2021/07/12 08:00 | Stoliar, Illia v Kuzey Cekirge | 6-2,6-3 |
| ITF M15 Marbella | 2021/05/23 07:00 | Michael Zhu v Stoliar, Illia | 6-1,6-4 |
| ITF - M25 Vale Do Lobo | 2021/03/07 12:00 | Alejandro Moro Canas v Stoliar, Illia | 6-2,6-2 |