Stadium: Court 21 Round: 25 Ground: Clay
| ITF M15 Cairo | 2021/12/01 13:35 | Daniil Ostapenkov v Giuseppe Tresca | 3-6,1-6 |
| ITF M15 Cairo | 2021/11/25 10:20 | Duckhee Lee v Daniil Ostapenkov | 6-4,6-3 |
| ITF M15 Cairo | 2021/11/24 07:55 | Daniil Ostapenkov v Tsung-Hao Huang | 6-1,6-0 |
| ITF M15 Sharm El Sheikh | 2021/11/10 14:05 | Saba Purtseladze v Daniil Ostapenkov | 7-6,6-3 |
| ITF M15 Sharm El Sheikh | 2021/11/03 08:00 | Daniil Ostapenkov v Emiliano Maggioli | 6-3,1-6,2-6 |
| ITF M15 Sharm El Sheikh | 2021/10/27 08:00 | Karim-Mohamed Maamoun v Daniil Ostapenkov | 7-6,6-0 |
| Davis Cup | 2021/09/19 17:40 | Federico Coria v Daniil Ostapenkov | 6-3,6-1 |
| Davis Cup | 2021/09/18 14:00 | Diego Schwartzman v Daniil Ostapenkov | 4-6,3-6 |
| Challenger Antalya | 2021/12/09 07:00 | Duckhee Lee v Oleg Prihodko | 3-6,3-6 |
| Challenger Antalya | 2021/12/07 07:30 | Oleg Prihodko v Riccardo Bonadio | 7-6,6-4 |
| Challenger Antalya | 2021/12/06 11:30 | Cezar Cretu v Oleg Prihodko | 6-2,6-4 |
| Challenger Antalya Qual | 2021/12/05 11:00 | Oleg Prihodko v Mick Veldheer | 1-6,6-3,6-2 |
| ITF M15 Antalya | 2021/11/24 09:20 | Oleg Prihodko v Lucas Gerch | 1-6,6-4,2-6 |
| ITF M15 Antalya | 2021/11/16 06:25 | Bogdan Ionut Apostol v Oleg Prihodko | 6-4,4-6,7-6 |
| ITF M15 Antalya | 2021/11/11 08:40 | Oleg Prihodko v Bastian Malla | 4-6,1-6 |
| ITF M15 Antalya | 2021/11/03 11:05 | Oleg Prihodko v Marsel Ilhan | 6-3,3-6,3-6 |