| UTR Pro Tennis Series Barcelona | 2021/08/06 07:00 | Kolisnyk, Olexiy v Daniel Sancho Arbizu | 6-4,6-2 |
| UTR Pro Tennis Series Barcelona | 2021/08/05 08:30 | Kolisnyk, Olexiy v Pereira, Miguel Fernando | 4-6,6-6 |
| UTR Pro Tennis Series Barcelona | 2021/08/04 11:30 | Colas Sanchez, Alberto v Kolisnyk, Olexiy | 0-6,2-6 |
| UTR Pro Tennis Series Barcelona | 2021/08/03 10:00 | Alvaro Bueno Gil v Kolisnyk, Olexiy | 1-6,6-3,6-6 |
| UTR Pro Tennis Series Pazardzhik | 2021/07/18 06:00 | Ilya Snitari v Kolisnyk, Olexiy | 7-5,3-6,2-5 |
| UTR Pro Tennis Series Pazardzhik | 2021/07/17 07:00 | Gorazd Srbljak v Kolisnyk, Olexiy | 0-6,6-4,3-6 |
| UTR Pro Tennis Series Pazardzhik | 2021/07/16 09:00 | Kolisnyk, Olexiy v Dmitrii Vasilev | 6-3,6-4 |
| UTR Pro Tennis Series Pazardzhik | 2021/07/15 07:30 | Kolisnyk, Olexiy v Yanais Laurent | 6-4,3-6,6-4 |
| UTR Pro Tennis Series Barcelona | 2021/08/06 11:30 | Deviatiarov, Marat v Guerrero Melgar, Angel | 6-2,6-1 |
| UTR Pro Tennis Series Barcelona | 2021/08/05 10:00 | Deviatiarov, Marat v Carretero, Pablo | 6-0,6-1 |
| UTR Pro Tennis Series Barcelona | 2021/08/04 07:00 | Jay Friend v Deviatiarov, Marat | 7-5,4-6,3-5 |
| UTR Pro Tennis Series Barcelona | 2021/08/03 08:30 | Federico Zeballos v Deviatiarov, Marat | 7-6,6-4 |
| ITF M15 Novomoskovsk | 2021/06/03 16:55 | Aliaksandr Liaonenka v Deviatiarov, Marat | 1-6,4-6 |
| ITF M15 Novomoskovsk | 2021/05/26 08:20 | Oleksandr Ovcharenko v Deviatiarov, Marat | 7-6,6-4 |
| ITF - M15 Tbilisi | 2021/05/18 07:00 | Deviatiarov, Marat v Marek Gengel | 1-6,4-6 |
| ITF M15 Jerusalem | 2021/05/13 07:00 | Justin Roberts v Deviatiarov, Marat | 6-1,6-2 |