Stadium: Court 2 Round: 14 Ground: Clay
| ITF M15 - Monastir | 2021/05/09 08:30 | Luca Potenza v Lucas Catarina | 1-6,6-2,6-1 |
| ITF M15 - Monastir | 2021/05/08 08:30 | Lucas Catarina v Alexander Donski | 7-6,1-6,6-4 |
| ITF M15 - Monastir | 2021/05/07 08:30 | Alibek Kachmazov v Lucas Catarina | 6-7,2-6 |
| ITF M15 - Monastir | 2021/05/06 08:30 | Zachary Svajda v Lucas Catarina | 4-6,3-6 |
| ITF M15 - Monastir | 2021/05/05 08:30 | Giorgio Ricca v Lucas Catarina | 2-6,6-3,3-6 |
| ITF M15 - Monastir | 2021/05/02 08:30 | Benjamin Pietri v Lucas Catarina | 0-6,0-6 |
| ITF M15 - Monastir | 2021/05/01 08:30 | Yuta Kawahashi v Lucas Catarina | 3-6,1-6 |
| ITF M15 - Monastir | 2021/04/30 10:20 | Alibek Kachmazov v Lucas Catarina | 2-6,2-6 |
| 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 - Kvalifikation | 2021/04/04 13:10 | Alexey Vatutin v Ronald Slobodchikov | 6-2,6-3 |
| ITF M15 - La Nucia | 2021/03/11 11:40 | Ronald Slobodchikov v Pablo Llamas Ruiz | 2-6,1-6 |
| ITF M15 - La Nucia | 2021/03/09 14:30 | Ronald Slobodchikov v Arthur Fils | 6-2,7-5 |
| Challenger - Gran Canaria | 2021/02/21 13:15 | Michael Vrbensky v Ronald Slobodchikov | 6-2,6-3 |