| ITF M15 Sharm El Sheikh | 09/29 10:45 | 26 | Borg, Leo v Ostapenkov, Daniil | 4-6,3-6 | |
| ITF M15 Sharm El Sheikh | 09/28 15:05 | 25 | Ostapenkov, Daniil v Shin, Woobin | 6-2,6-3 | |
| ITF M15 Sharm El Sheikh | 09/27 08:00 | 62 | Leonardo Rossi v Ostapenkov, Daniil | 4-6,1-6 | |
| ITF M15 Sharm El Sheikh | 09/26 09:00 | 62 | 이브라힘, 카림 v Ostapenkov, Daniil | 2-6,3-6 | |
| ITF M15 Sharm El Sheikh | 09/25 09:00 | 62 | Simone Vaccari v Ostapenkov, Daniil | 3-6,4-6 | |
| ITF M15 Sharm El Sheikh | 09/21 10:55 | 25 | Marcello Serafini v Ostapenkov, Daniil | 6-2,6-3 | |
| ITF M15 Sharm El Sheikh | 09/20 08:00 | 62 | Jacob Bradshaw v Ostapenkov, Daniil | 7-6,4-6,6-10 | |
| ITF M15 Sharm El Sheikh | 09/19 09:00 | 62 | Qabazard, Essa v Ostapenkov, Daniil | 3-6,0-6 | |
| ITF M15 Sharm El Sheikh | 09/12 08:00 | 62 | Ostapenkov, Daniil v 이, 태우 | 4-6,2-6 | |
| ITF M25 Tbilisi | 08/08 07:30 | 44 | Simakin, Ilia v Ostapenkov, Daniil | 6-1,7-6 | |
| ITF M25 Tbilisi | 08/07 06:00 | 44 | 스테파니안, 아레그 v Ostapenkov, Daniil | 1-6,1-6 | |
| ITF M25 Tbilisi | 07/31 11:45 | 44 | Shin, Maksim v Ostapenkov, Daniil | 3-6,6-4,10-4 | |
| ITF M25 Tbilisi | 07/31 06:00 | 44 | 아란자발, 미켈 v Ostapenkov, Daniil | 5-7,2-6 | |
| ITF M25 Tbilisi | 07/27 06:30 | 26 | Ostapenkov, Daniil v Polukhin, Savva | 4-6,1-6 | |
| ITF M25 Tbilisi | 07/26 09:40 | 25 | 홍, 승찬 v Ostapenkov, Daniil | 3-6,3-6 | |
| ITF M25 Tbilisi | 07/25 07:45 | 44 | Trunov, Igor v Ostapenkov, Daniil | 6-7,2-6 | |
| ITF M25 Tbilisi | 07/24 12:10 | 44 | Pavlo Rezoglazov v Ostapenkov, Daniil | 0-6,2-6 | |
| ITF M25 Nur-Sultan | 07/13 09:00 | 25 | 카타리나, 루카스 v Ostapenkov, Daniil | 6-2,6-1 | |
| ITF M25 Nur-Sultan | 07/12 07:15 | 54 | 노스킨, 이고르 v Ostapenkov, Daniil | 4-6,4-6 | |
| ITF M25 Nur-Sultan | 07/11 07:45 | 54 | Alexander Ryzhikov v Ostapenkov, Daniil | 2-6,3-6 | |
| ITF M15 Antalya | 04/27 12:40 | 25 | Ostapenkov, Daniil v 프리호드코, 올레그 | 0-6,1-6 | |
| ITF M15 Antalya | 04/19 08:45 | 62 | Li, Hanwen v Ostapenkov, Daniil | 6-4,6-7,10-8 | |
| ITF M15 Antalya | 04/18 07:00 | 62 | Ostapenkov, Daniil v 바치마이엘, 필리프 | 7-5,7-6 | |
| ITF M15 Antalya | 04/17 07:00 | 62 | 펠린, 크리스티안 v Ostapenkov, Daniil | 3-6,0-6 | |
| ITF M15 Antalya | 04/10 06:00 | 62 | Ostapenkov, Daniil v Scott, Fletcher | 6-3,3-6,4-10 | |
| ITF M15 Antalya | 04/06 09:25 | 25 | 프리호드코, 올레그 v Ostapenkov, Daniil | 6-1,6-1 | |
| ITF M15 Antalya | 04/05 06:55 | 62 | Ostapenkov, Daniil v 우스기, 카이토 | 3-6,6-4,11-9 | |
| ITF M15 Antalya | 04/04 07:00 | 62 | Ostapenkov, Daniil v 포스테이, 알란 | 6-4,6-2 | |
| ITF M15 Antalya | 04/03 07:00 | 62 | 니시와키, 카즈키 v Ostapenkov, Daniil | 1-6,7-5,9-11 | |
| ITF M15 Antalya | 03/27 07:00 | 62 | Ostapenkov, Daniil v 차이야린, 크레디트 | 4-6,4-6 |