Stadium: Court 3 Round: 26 Ground: Hardcourt outdoor
| ITF - M15 Sharm El Sheikh | 2021/03/24 07:30 | Deviatiarov, Marat v Babji Siva Atturu | 6-2,6-0 |
| ITF - M15 Sharm El Sheikh | 2021/03/17 07:30 | Deviatiarov, Marat v Petros Chrysochos | 3-6,2-6 |
| ITF M15 Kazan | 2021/03/10 11:30 | Stepin, Alexander v Deviatiarov, Marat | 6-4,7-5 |
| ITF M15 St Petersburg | 2021/02/11 12:55 | Jan Choinski v Deviatiarov, Marat | 6-4,6-7,6-1 |
| ITF M15 St Petersburg | 2021/02/10 10:40 | Alibek Kachmazov v Deviatiarov, Marat | 2-6,4-6 |
| ITF M15 St Petersburg | 2021/02/04 11:45 | Deviatiarov, Marat v Ivan Gakhov | 6-1,2-6,3-6 |
| ITF M15 St Petersburg | 2021/02/02 08:20 | Deviatiarov, Marat v Mikhail Gorokhov | 6-1,6-3 |
| Eastern European Championship | 2020/12/29 14:40 | Deviatiarov, Marat v Kekez, Duje | 3-6,6-7 |
| ITF - M15 Sharm El Sheikh | 2021/03/24 07:30 | Lorens, Mikolaj v Makoto Ochi | 3-6,0-6 |
| ITF - M15 Sharm El Sheikh | 2021/03/21 07:30 | Lucas Miedler v Makoto Ochi | 6-3,7-6 |
| ITF - M15 Sharm El Sheikh | 2021/03/20 07:30 | Makoto Ochi v Yu Hsiou Hsu | 6-4,2-6,6-3 |
| ITF - M15 Sharm El Sheikh | 2021/03/19 09:20 | Marek Gengel v Makoto Ochi | 3-6,6-3,3-6 |
| ITF - M15 Sharm El Sheikh | 2021/03/18 09:40 | Makoto Ochi v Niki, Takuto | 6-3,6-2 |
| ITF - M15 Sharm El Sheikh | 2021/03/17 11:30 | Makoto Ochi v Krainer, L. | 6-3,6-7,6-4 |
| ITF - M15 Sharm El Sheikh | 2021/03/10 13:45 | Makoto Ochi v Niels Visker | 6-4,3-6,6-7 |
| Nonthaburi, Singles M-ITF-THA-01A | 2020/02/07 02:30 | Sebastian Fanselow v Makoto Ochi | 6-0,6-3 |