Stadium: Court 13 Round: 62
| ITF M15 Platja D'Aro | 2021/10/03 11:00 | Jorge Martinez Martinez v Ivan Kazakov | 6-7,6-3,10-2 |
| ITF M25 Ricany | 2021/08/30 09:00 | Antonin Stepanek v Ivan Kazakov | 6-1,7-5 |
| ITF M25 Poznan | 2021/08/24 14:00 | Ivan Kazakov v Michal Mikula | 1-6,2-6 |
| ITF M25 Poznan | 2021/08/24 08:00 | Ivan Kazakov v Flemming Peters | 2-6,7-5,10-3 |
| ITF M25 Poznan | 2021/08/22 08:00 | Oscar Weightman v Ivan Kazakov | 6-3,2-6,1-10 |
| ITF M15 Warmbad-Villach | 2021/08/16 07:00 | Ivan Kazakov v Gonzalo Achondo | 6-3,0-6,8-10 |
| ITF M15 Antalya | 2021/06/27 06:30 | Ivan Kazakov v Stefanos Sakellaridis | 1-6,4-6 |
| ITF M15 Antalya | 2021/06/20 07:00 | Ivan Kazakov v Ray Ho | 2-6,1-6 |
| ITF M15 Platja D'Aro | 2021/10/03 11:00 | Nil Boixader Roca v Noah Regas | 7-6,6-4 |
| UTR Pro Tennis Series Barcelona | 2021/08/08 07:00 | Noah Regas v Jordi Samper-Montana | 2-6,1-6 |
| UTR Pro Tennis Series Barcelona | 2021/08/07 07:00 | Noah Regas v Angel G Melgar | 7-5,6-3 |
| UTR Pro Tennis Series Barcelona | 2021/08/05 08:30 | Noah Regas v Daniel Sancho Arbizu | 4-6,4-6 |
| ITF M25 Reus | 2021/04/11 07:00 | Noah Regas v Francisco Andreu Garcia | 6-3,1-6,3-10 |