| ITF M15 Monastir | 04/04 13:55 | 62 | Ostapenkov, Daniil v Amaan Siddiqui | 6-0,6-1 | |
| ITF M15 Monastir | 04/04 08:30 | 62 | Ostapenkov, Daniil v Henry Jefferson | 6-0,6-0 | |
| ITF M15 Monastir | 04/03 15:00 | 62 | Ostapenkov, Daniil v Tushar Sharma | 6-3,6-0 | |
| ITF M15 Monastir | 03/29 13:10 | 25 | Ostapenkov, Daniil v Soriano Barrera, Adria | Retired | |
| ITF M15 Monastir | 03/27 12:30 | 62 | Ostapenkov, Daniil v Yua Taka | 6-0,6-3 | |
| ITF M15 Monastir | 03/27 08:30 | 62 | Ostapenkov, Daniil v Zhan Zheng | 6-2,6-1 | |
| ITF M15 Monastir | 03/26 08:30 | 62 | Ostapenkov, Daniil v 아투루, 바브지 시바 | 6-1,6-2 | |
| ITF M15 Monastir | 03/22 12:30 | 25 | 무, 타오 v Ostapenkov, Daniil | 6-4,6-3 | |
| ITF M15 Monastir | 03/20 13:00 | - | Ostapenkov, Daniil v 살로몬, 페데리코 | 6-2,7-5 | |
| ITF M15 Monastir | 03/20 08:00 | 62 | Ostapenkov, Daniil v Yua Taka | 6-4,7-6 | |
| ITF M25 Monastir | 02/15 08:30 | 25 | Ostapenkov, Daniil v 타부르, 클레멘트 | 0-6,5-7 | |
| ITF M25 Monastir | 02/13 15:30 | 62 | 다라스, 마이엘 v Ostapenkov, Daniil | 2-6,4-6 | |
| ITF M25 Monastir | 02/13 11:35 | 62 | Genov, Anthony v Ostapenkov, Daniil | 1-6,1-6 | |
| ITF M25 Monastir | 02/12 08:30 | 62 | Ostapenkov, Daniil v Salton, Dylan | 6-1,6-1 | |
| ITF M25 Monastir | 02/08 10:30 | 25 | Ostapenkov, Daniil v 둥, 버화 | 6-1,3-6,6-7 | |
| ITF M25 Monastir | 02/06 13:30 | 62 | Mika Brunold v Ostapenkov, Daniil | 4-6,0-6 | |
| ITF M25 Monastir | 02/06 08:30 | 62 | Shivank Bhatnagar v Ostapenkov, Daniil | 4-6,1-6 | |
| ITF M25 Monastir | 02/01 08:30 | 25 | Ostapenkov, Daniil v 빈센트 루게리, 사무엘 | 1-6,5-7 | |
| ITF M25 Monastir | 01/30 13:30 | 62 | Ostapenkov, Daniil v Genov, Anthony | 6-4,6-2 | |
| ITF M25 Monastir | 01/30 08:30 | 62 | Ostapenkov, Daniil v Karol Tomanski | Retired | |
| ITF M15 Sharm El Sheikh | 12/21 10:35 | 25 | 트케말라드즈, 주라 v Ostapenkov, Daniil | 6-1,2-6,6-4 | |
| ITF M15 Sharm El Sheikh | 12/14 08:00 | 25 | 메트레벨리, 알렉산드레 v Ostapenkov, Daniil | 6-4,2-6,6-4 | |
| ITF M15 Sharm El Sheikh | 11/21 08:00 | 62 | Ostapenkov, Daniil v Woohyuk Sim | 1-6,6-1,9-11 | |
| ITF M25 Sharm El Sheikh | 11/16 08:00 | 25 | 포민, 세르게이 v Ostapenkov, Daniil | 3-6,7-6,6-1 | |
| ITF M25 Sharm El Sheikh | 11/11 08:00 | 27 | 파커, 스투알트 v Ostapenkov, Daniil | 7-6,6-3 | |
| ITF M25 Sharm El Sheikh | 11/10 10:50 | 26 | 로, 치엔순 v Ostapenkov, Daniil | 2-6,2-6 | |
| ITF M25 Sharm El Sheikh | 11/09 11:00 | 25 | Ostapenkov, Daniil v 크리스틴, 페드자 | Retired | |
| ITF M25 Sharm El Sheikh | 11/08 10:10 | 62 | Ostapenkov, Daniil v 자카리아, 파리스 | 6-2,6-0 | |
| ITF M25 Sharm El Sheikh | 11/07 12:30 | 62 | Ostapenkov, Daniil v 무겔리, 피에트로 | 6-1,6-0 | |
| ITF M15 Sharm El Sheikh | 09/30 08:00 | 27 | Ostapenkov, Daniil v 트케말라드즈, 주라 | 3-6,6-3,0-6 |