Stadium: Court 18 Round: 62 Ground: Clay
| ITF M15 Eupen | 2019/08/06 12:10 | Vladimir Korolev v Denis Klok | 2-6,1-6 |
| ITF Kazakhstan F4 Qual | 2017/04/16 09:25 | Vladimir Korolev v Denis Klok | 7-6,1-6,2-6 |
| ITF M15 Antalya | 2021/04/26 07:00 | Denis Klok v Vojtech Mares | 6-3,6-2 |
| ITF M15 Antalya | 2021/04/25 07:00 | Denis Klok v Vladislav Ivanov | 6-1,7-6 |
| ITF M15 Antalya | 2021/04/18 07:00 | Denis Klok v Noel Larwig | 5-7,0-6 |
| ITF M15 Shymkent | 2021/04/15 04:00 | Denis Klok v Ivan Gakhov | 5-7,6-7 |
| ITF M15 Shymkent | 2021/04/14 08:45 | Kirill Kolganov v Denis Klok | 4-6,1-6 |
| ITF M15 Shymkent | 2021/04/08 05:30 | Denis Klok v Dostanbek Tashbulatov | 2-6,4-6 |
| ITF M15 Shymkent | 2021/04/07 03:50 | Denis Klok v Islam Orynbasar | 6-1,6-2 |
| ITF M15 Kazan | 2021/03/09 12:15 | Sergey Fomin v Denis Klok | 6-2,6-4 |
| ITF M15 Antalya | 2021/04/26 09:00 | Mattia Rossi v Vladimir Korolev | 3-6,7-6,9-11 |
| ITF M15 Antalya | 2021/04/14 08:45 | Edoardo Graziani v Vladimir Korolev | 7-6,6-2 |
| ITF M15 Antalya | 2021/04/13 07:00 | Vladimir Korolev v Federico Campana | 6-0,6-4 |
| ITF M15 Antalya | 2021/04/12 07:00 | Vladimir Korolev v Federico Marchetti | 6-2,6-2 |
| ITF M15 Antalya | 2021/04/11 07:00 | Vladimir Korolev v Davide Albertoni | 6-1,6-4 |
| ITF M15 Antalya | 2021/03/18 09:05 | Miljan Zekic v Vladimir Korolev | 6-2,6-4 |
| ITF M15 Antalya | 2021/03/17 08:00 | Vladimir Korolev v Yanki Erel | 2-6,6-0,6-1 |
| ITF M15 Antalya | 2021/03/16 06:30 | Vladimir Korolev v Marlon Vankan | 6-4,6-3 |