Stadium: Court 5 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Monastir | 2021/07/12 08:00 | Jake Van Emburgh v Fermin Calvo Barcelo | 6-3,3-6,10-6 |
| ITF M15 Monastir | 2021/07/05 09:00 | Fermin Calvo Barcelo v Valentin Vacherot | 4-6,1-6 |
| UTR Pro Tennis Series Barcelona | 2021/05/02 10:00 | Ilya Snitari v Fermin Calvo Barcelo | 7-6,6-4 |
| UTR Pro Tennis Series Barcelona | 2021/05/01 11:00 | Warren Sinius v Fermin Calvo Barcelo | 0-6,0-5 |
| UTR Pro Tennis Series Barcelona | 2021/04/29 09:30 | Fermin Calvo Barcelo v Pol Toledo Bague | 2-6,0-6 |
| UTR Pro Tennis Series Barcelona | 2021/04/28 13:20 | Fermin Calvo Barcelo v Noah Lopez | 5-7,2-6 |
| UTR Pro Tennis Series Barcelona | 2021/04/26 09:30 | Fermin Calvo Barcelo v Ronald Slobodchikov | 4-6,3-6 |
| ITF M15 Monastir | 2021/07/11 09:00 | Evgeny Philippov v Nikolay Sysoev | 6-2,6-1 |
| ITF M15 Monastir | 2021/07/05 09:00 | Lorenzo Rottoli v Nikolay Sysoev | 6-1,6-4 |
| ITF M15 Antalya | 2021/06/28 10:50 | Vladimir Korolev v Nikolay Sysoev | 6-1,6-0 |
| ITF M15 Antalya | 2021/06/27 06:30 | Nikolay Sysoev v Jason Janis | 6-3,6-4 |
| ITF M15 Antalya | 2021/06/20 07:00 | Fletcher Scott v Nikolay Sysoev | 6-1,7-5 |
| ITF M15 Antalya | 2021/06/14 07:30 | Nikolay Sysoev v Daniel Antonio Nunez | 2-6,3-6 |
| ITF M15 Antalya | 2021/06/13 07:30 | Suleyman Deniz Gursoy v Nikolay Sysoev | 2-6,4-6 |
| ITF M15 Cancun | 2020/03/08 20:00 | Jose Olivares v Nikolay Sysoev | 6-3,6-2 |