Stadium: Court Central Round: 14 Ground: Hardcourt outdoor
| Challenger - Oeiras | 2021/05/23 10:00 | Filip Cristian Jianu v Cabral, Francisco | 6-7,6-4,6-2 |
| Challenger - Oeiras | 2021/05/16 14:00 | Cabral, Francisco v Alex Molcan | 1-6,1-6 |
| ITF M15 Valldoreix | 2021/05/11 08:00 | Niels Visker v Cabral, Francisco | 7-5,6-0 |
| ITF M15 Valldoreix | 2021/05/10 09:00 | Cabral, Francisco v Ryan Nijboer | 6-1,7-5 |
| ITF M15 Valldoreix | 2021/05/09 13:00 | Cabral, Francisco v Rafael Giotis | 7-5,6-0 |
| ITF M15 Majadahonda | 2021/05/02 12:00 | Cabral, Francisco v Bondarevskiy, Yan | 5-7,3-6 |
| ITF - M15 Antalya | 2021/04/20 12:00 | Maggioli, Emiliano v Cabral, Francisco | 6-4,6-3 |
| ITF - M15 Antalya | 2021/04/19 07:00 | Cabral, Francisco v Fabrizio Andaloro | 7-5,7-6 |
| Challenger - Aix en Provence | 2021/06/13 08:30 | Slobodchikov, Ronald v Oscar Jose Gutierrez | 1-6,4-6 |
| Challenger Biella | 2021/05/30 13:30 | Slobodchikov, Ronald v Camilo Ugo Carabelli | 2-6,1-6 |
| Challenger - Oeiras | 2021/05/23 10:00 | Lucas Catarina v Slobodchikov, Ronald | 6-1,6-3 |
| UTR Pro Tennis Series Barcelona | 2021/05/02 07:00 | Slobodchikov, Ronald v Dzhavakian, Yurii | 4-6,2-6 |
| UTR Pro Tennis Series Barcelona | 2021/04/28 09:30 | Slobodchikov, Ronald v Toledo Bague, Pol | 2-6,2-6 |
| UTR Pro Tennis Series Barcelona | 2021/04/27 09:30 | Slobodchikov, Ronald v Noah Lopez | 2-6,4-6 |
| UTR Pro Tennis Series Barcelona | 2021/04/26 09:30 | Calvo Barcelo, Fermin v Slobodchikov, Ronald | 4-6,3-6 |
| Challenger Oeiras Qual | 2021/04/04 13:10 | Alexey Vatutin v Slobodchikov, Ronald | 6-2,6-3 |