Estadio: Center Court Round: 14 Ground: Clay
| Challenger Almaty | 2021/06/10 05:30 | Filip Cristian Jianu v Dmitry Popko | 5-7,3-6 |
| Challenger Almaty | 2021/06/08 10:20 | Teymuraz Gabashvili v Filip Cristian Jianu | 1-6,3-6 |
| Challenger Almaty | 2021/06/07 06:30 | Filip Cristian Jianu v Ivan Gakhov | 4-6,7-5,7-6 |
| Challenger Almaty | 2021/06/06 06:00 | Filip Cristian Jianu v Tsung-Hua Yang | 6-2,6-3 |
| Challenger de Oeiras | 2021/05/28 11:55 | Filip Cristian Jianu v Nuno Borges | 4-6,4-6 |
| Challenger de Oeiras | 2021/05/27 13:35 | Chun Hsin Tseng v Filip Cristian Jianu | 3-6,6-3,1-6 |
| Challenger de Oeiras | 2021/05/25 14:00 | Johannes Haerteis v Filip Cristian Jianu | 3-6,0-6 |
| Challenger de Oeiras | 2021/05/24 10:00 | Filip Cristian Jianu v Federico Zeballos | 6-4,7-5 |
| ITF M15 Shymkent | 2021/06/02 10:10 | Danil Ozernoy v Alexander Shevchenko | 2-6,2-6 |
| ITF M15 Shymkent | 2021/05/26 04:00 | Pavel Verbin v Danil Ozernoy | 7-6,4-6,7-5 |
| ITF M15 Shymkent | 2021/04/12 06:40 | Piotr Pawlak v Danil Ozernoy | 6-1,7-6 |
| ITF M15 Shymkent | 2021/04/07 07:25 | Bulat Galiev v Danil Ozernoy | 6-4,6-1 |
| ITF M15 Shymkent | 2021/04/06 07:40 | Kirill Kolganov v Danil Ozernoy | 6-7,2-6 |
| ITF M15 Shymkent | 2021/04/05 07:00 | Alexander Chernomaz v Danil Ozernoy | 4-6,4-6 |
| Challenger de Nur-Sultán - Clasificación | 2021/02/28 07:25 | Tung-Lin Wu v Danil Ozernoy | 6-1,6-0 |
| Challenger de Nur-Sultan | 2021/02/21 04:00 | Ivan Nedelko v Danil Ozernoy | 6-4,6-0 |