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