Stadium: Court 4 Round: 54 Ground: Hardcourt indoor
| ITF M15 St Petersburg - Kval | 2021/04/11 15:45 | Alexandr Binda v Pavel Shchaya-Zubrov | 4-6,6-4,9-11 |
| ITF M15 St Petersburg | 2021/04/04 07:00 | Pavel Shchaya-Zubrov v Illya Beloborodko | 2-6,0-6 |
| ITF M15 St Petersburg - Kval | 2021/02/07 13:35 | Andrew Paulson v Pavel Shchaya-Zubrov | 6-2,6-2 |
| ITF M15 Antalya | 2021/01/18 09:00 | Pavel Shchaya-Zubrov v Billy Harris | 0-6,2-6 |
| ITF M15 Antalya | 2021/01/11 07:00 | Yan Sabanin v Pavel Shchaya-Zubrov | 6-2,6-3 |
| ITF M15 Antalya | 2021/01/10 06:00 | Pavel Shchaya-Zubrov v Bulat Galiev | 6-3,6-2 |
| ITF M15 Kazan | 2020/03/10 07:00 | Igor Trunov v Pavel Shchaya-Zubrov | 6-7,6-3,10-6 |
| ITF M15 Kazan | 2020/03/09 07:00 | Radimir Lutkovskii v Pavel Shchaya-Zubrov | 2-6,1-6 |
| ITF M15 St Petersburg | 2021/04/07 09:55 | Illya Beloborodko v Constantin Bittoun Kouzmine | 6-3,6-1 |
| ITF M15 St Petersburg | 2021/04/05 08:40 | Constantin Bittoun Kouzmine v Matic Spec | 6-7,6-7 |
| ITF M15 St Petersburg | 2021/04/04 11:55 | Jaimee Floyd Angele v Constantin Bittoun Kouzmine | 6-1,1-6,7-10 |
| ITF M15 Poitiers | 2021/03/14 11:45 | Constantin Bittoun Kouzmine v Vincent Stouff | 6-3,6-7,7-10 |
| ITF M15 Bratislava | 2021/03/10 10:30 | Constantin Bittoun Kouzmine v Vitaliy Sachko | 6-3,2-6,3-6 |
| ITF M15 Bratislava | 2021/03/09 09:00 | Martin Dobry v Constantin Bittoun Kouzmine | 3-6,0-6 |
| ITF M15 Bratislava | 2021/03/08 15:00 | Jan Jermar v Constantin Bittoun Kouzmine | 6-7,2-6 |
| ITF M15 Bratislava | 2021/03/04 09:00 | Baptiste Crepatte v Constantin Bittoun Kouzmine | 5-7,6-4,6-3 |