Stadium: Court 3 Round: 25 Ground: Clay
| ITF - M15 Kazan | 2021/03/10 15:10 | Yanki Erel v Alexander Cozbinov | 6-3,6-4 |
| ITF - M15 St Petersburg | 2021/02/12 11:35 | Jan Choinski v Alexander Cozbinov | 6-2,6-7,6-4 |
| ITF - M15 St Petersburg | 2021/02/11 11:15 | Andrey Chepelev v Alexander Cozbinov | 0-6,2-6 |
| ITF - M15 St Petersburg | 2021/02/10 10:10 | Alexander Cozbinov v Daniel Michalski | 3-6,6-1,6-1 |
| ITF - M15 St Petersburg | 2021/02/08 07:00 | Alexander Cozbinov v Egor Noskin | 3-6,6-0,10-5 |
| ITF - M15 St Petersburg - Calificari | 2021/02/07 10:00 | Alexander Cozbinov v Leonid Sheyngezikht | 6-4,6-3 |
| ITF - M15 St Petersburg | 2021/02/05 08:30 | Alibek Kachmazov v Alexander Cozbinov | 6-4,7-6 |
| ITF - M15 St Petersburg | 2021/02/04 11:25 | Alexander Cozbinov v Evgeny Tyurnev | 7-5,2-6,7-6 |
| ITF - M15 Antalya | 2021/03/11 06:55 | Jeroen Vanneste v Vladimir Korolev | 3-6,3-6 |
| ITF - M15 Antalya | 2021/03/10 13:35 | Jeroen Vanneste v Mikolaj Lorens | 7-6,6-3 |
| ITF - M15 Antalya | 2021/03/03 09:45 | Radu Mihai Papoe v Jeroen Vanneste | 3-6,6-2,6-3 |
| ITF - M15 Antalya | 2021/02/09 13:15 | Jeroen Vanneste v Jacopo Berrettini | 7-6,3-6,3-6 |
| ITF - M15 Antalya | 2021/02/09 12:40 | Jeroen Vanneste v Jacopo Berrettini | 7-6,3-6,3-6 |
| ITF - M15 Antalya | 2021/02/04 06:30 | Jeroen Vanneste v Vlad Andrei Dancu | 3-6,4-6 |
| ITF - M15 Manacor | 2021/01/12 12:30 | Jeroen Vanneste v Holger Rune | 1-6,0-6 |
| ITF - M15 Manacor | 2021/01/05 12:15 | Jeroen Vanneste v Evan Furness | 2-6,5-7 |