| UTR Pro Tennis Series Zadar | 2021/07/04 10:00 | Matija Pecotic v Zmak, Deni | 6-3,6-3 |
| UTR Pro Tennis Series Zadar | 2021/07/03 08:30 | Krstanovic, Josip v Zmak, Deni | 5-7,3-5 |
| UTR Pro Tennis Series Zadar | 2021/07/02 08:00 | Zmak, Deni v Barun, Bozo | 6-2,6-2 |
| UTR Pro Tennis Series Zadar | 2021/07/01 12:30 | Zmak, Deni v Vito Tonejc | 6-3,5-2 |
| UTR Pro Tennis Series Zadar | 2021/06/30 11:00 | Arthus De La Bassetiere v Zmak, Deni | 2-6,3-5 |
| UTR Pro Tennis Series Zadar | 2021/06/29 08:00 | Ihor Dudun v Zmak, Deni | 3-6,2-6 |
| ITF - M15 Rovinj | 2021/03/16 08:55 | Matteo Arnaldi v Zmak, Deni | 6-3,6-4 |
| ITF - M15 Rovinj | 2021/03/15 11:30 | Zmak, Deni v Rogic Hadzalic, Alen | 6-3,7-6 |
| ITF M15 Novomoskovsk | 2021/05/31 06:15 | Gorodynskyi, Vladyslav v Maulenov, Timur | 3-6,6-3,7-10 |
| ITF M15 Novomoskovsk | 2021/05/30 06:15 | Galfinger, Rostislav v Maulenov, Timur | 6-2,1-6,6-10 |
| ITF M15 Novomoskovsk | 2021/05/26 11:40 | Dzhavakian, Yurii v Maulenov, Timur | 3-6,6-4,7-5 |
| ITF M15 Novomoskovsk | 2021/05/25 07:00 | Ivanov, Simon Anthony v Maulenov, Timur | 6-4,5-7,7-10 |
| ITF M15 Novomoskovsk | 2021/05/24 12:00 | Mikula, Michal v Maulenov, Timur | 6-1,1-6,6-10 |
| ITF M15 Novomoskovsk | 2021/05/23 08:00 | Vescovi, Tommaso v Maulenov, Timur | 1-6,4-6 |
| ITF M15 Novomoskovsk | 2020/09/02 08:40 | Deviatiarov, Marat v Maulenov, Timur | 7-6,7-6 |
| ITF M15 Novomoskovsk | 2020/08/31 09:00 | Maulenov, Timur v Aleksandr Braynin | 3-6,6-4,10-8 |