| UTR Pro Tennis Series - Zadar | 2021/09/29 15:00 | Ivan Liutarevich v Deni Zmak | 4-6,6-4,6-6 |
| UTR Pro Tennis Series - Zadar | 2021/09/28 11:00 | Maxim Krapivin v Deni Zmak | 2-6,2-5 |
| UTR Pro Tennis Series - Portoroz | 2021/08/29 08:00 | Olexiy Kolisnyk v Deni Zmak | 4-6,6-2,6-3 |
| UTR Pro Tennis Series - Portoroz | 2021/08/28 07:00 | Egor Novikov v Deni Zmak | 2-6,7-6,1-5 |
| UTR Pro Tennis Series - Portoroz | 2021/08/26 08:30 | Denis Parshutin v Deni Zmak | 3-6,0-6 |
| UTR Pro Tennis Series - Portoroz | 2021/08/25 13:00 | Tilen Zitnik v Deni Zmak | 3-6,1-6 |
| UTR Pro Tennis Series - Portoroz | 2021/08/24 07:00 | Deni Zmak v Timur Maulenov | 7-6,5-1 |
| UTR Pro Tennis Series - Portoroz | 2021/08/22 10:00 | Deni Zmak v Oleksandr Bielinskyi | 6-2,7-6 |
| UTR Pro Tennis Series - Zadar | 2021/09/28 11:00 | Ivan Liutarevich v Ivan Denisov | 3-6,2-6 |
| UTR Pro Tennis Series - Zadar | 2021/09/27 11:00 | Ivan Denisov v Michalis Sakellaridis | 6-2,5-1 |
| ITF - M15 Shymkent | 2021/06/02 05:00 | Ivan Denisov v Beibit Zhukayev | 2-6,2-6 |
| ITF - M15 Shymkent | 2021/06/01 07:00 | Ivan Denisov v Olimjon Nabiev | 7-5,6-4 |
| ITF - M15 Shymkent | 2021/05/31 09:35 | Ibrokhimjon Urinov v Ivan Denisov | 1-6,1-6 |
| ITF - M15 Shymkent | 2021/05/25 04:00 | Alexandr Binda v Ivan Denisov | 6-2,6-7,10-7 |
| ITF - M15 Shymkent | 2021/05/24 06:55 | Ivan Denisov v Mark Tryakshin | 6-1,6-1 |
| ITF - M15 Shymkent | 2021/04/13 05:00 | Jack Gibbens v Ivan Denisov | 7-6,7-5 |