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