Stadium: Court 2 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Girona | 2021/10/23 09:00 | Maks Kasnikowski v Pol Toledo Bague | 3-6,2-6 |
| ITF M15 Girona | 2021/10/22 10:30 | Ivan Gakhov v Maks Kasnikowski | 6-4,5-7,5-7 |
| ITF M15 Girona | 2021/10/21 08:00 | Fermin Tenti v Maks Kasnikowski | 3-6,4-6 |
| ITF M15 Girona | 2021/10/19 09:00 | Maks Kasnikowski v Aleksandre Metreveli | 5-7,6-2,7-5 |
| Challenger Szczecin | 2021/09/12 12:10 | Vitaliy Sachko v Maks Kasnikowski | 6-7,6-1,6-3 |
| Challenger Warsaw | 2021/08/25 15:40 | Camilo Ugo Carabelli v Maks Kasnikowski | 6-2,6-4 |
| ITF M15 Gdynia | 2021/08/11 12:30 | Petr Hajek v Maks Kasnikowski | 6-4,6-7,7-5 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/05 08:35 | Maks Kasnikowski v Zsombor Piros | 4-6,7-6,6-7 |
| ITF M15 Madrid | 2021/10/27 09:45 | Stefan Micov v Manish Sureshkumar | 6-3,4-6,7-6 |
| ITF M15 Girona | 2021/10/19 09:00 | Alexander Weis v Manish Sureshkumar | 2-6,7-6,6-2 |
| ITF M15 Platja D'Aro | 2021/10/14 09:00 | Manish Sureshkumar v Maxime Chazal | 4-6,5-7 |
| ITF M15 Platja D'Aro | 2021/10/13 10:20 | Pol Amoros Ramos v Manish Sureshkumar | 2-6,5-7 |
| ITF M15 Platja D'Aro | 2021/10/07 13:35 | Giovanni Fonio v Manish Sureshkumar | 6-0,6-1 |
| ITF M15 Platja D'Aro | 2021/10/05 08:25 | Alex Barrena v Manish Sureshkumar | 5-7,4-6 |
| Challenger Murcia | 2021/09/26 10:40 | Manish Sureshkumar v Jonathan Mridha | 6-7,4-6 |
| ITF M25 Madrid | 2021/09/14 07:00 | Manish Sureshkumar v Mario G Fernandez | 6-4,6-3 |