Stadion: Court 7 Round: 25 Ground: Clay
| ITF - M15 - St. Petersburg - Qualifikation | 2021/04/11 12:25 | Victor Ernaelsteen v Sergei Pogosian | 6-3,7-5 |
| ITF - M15 - St. Petersburg | 2021/04/04 13:20 | Ivan Nedelko v Sergei Pogosian | 6-1,6-1 |
| ITF - M15 - Kazan | 2021/03/11 09:10 | Sergei Pogosian v Sanjar Fayziev | 0-6,3-6 |
| ITF - M15 - Kazan | 2021/03/10 15:05 | Marat Sharipov v Sergei Pogosian | 6-4,3-6,6-7 |
| ITF - M15 - Kazan | 2021/03/09 09:30 | Sergei Pogosian v Alexander Ovcharov | 6-2,6-3 |
| ITF - M15 - Kazan | 2021/03/08 13:15 | Sergei Pogosian v Oscar Galimardanov | 6-3,5-7,10-7 |
| ITF - M15 - St. Petersburg | 2021/02/01 09:25 | Alibek Kachmazov v Sergei Pogosian | 6-2,6-0 |
| ITF - M15 - St. Petersburg | 2021/01/31 13:40 | Sergei Pogosian v Egor Agafonov | 7-6,6-3 |
| ITF - M15 - Antalya | 2021/06/03 07:30 | Pietro Rondoni v Daisuke Sumizawa | 6-3,6-2 |
| ITF - M15 - Antalya | 2021/06/02 09:20 | Daisuke Sumizawa v Santiago De La Fuente | 5-7,7-5,7-5 |
| ITF - M15 - Antalya | 2021/06/01 07:00 | Daisuke Sumizawa v Nicolas Parizzia | 4-6,6-1,6-10 |
| ITF - M15 - Antalya | 2021/05/31 07:30 | Daisuke Sumizawa v Bora Sengul | 6-1,7-6 |
| ITF - M15 - Antalya | 2021/05/23 07:30 | Daisuke Sumizawa v Miguel Fernando Pereira | 4-6,1-6 |
| ITF - M15 - Antalya | 2021/05/18 07:00 | Mariano Navone v Daisuke Sumizawa | 6-3,6-1 |
| ITF - M15 - Antalya | 2021/05/17 07:00 | Dmitrii Vasilev v Daisuke Sumizawa | 6-7,4-6 |
| ITF - M15 - Antalya | 2021/05/16 07:00 | Sebastian Bahamondes v Daisuke Sumizawa | 1-6,1-6 |