Stadium: Court 8 Round: 44 Ground: Clay
| ITF M15 St Petersburg | 2021/04/15 09:45 | Constantin Bittoun Kouzmine v Alexey Zakharov | 4-6,4-6 |
| ITF M15 St Petersburg | 2021/04/14 10:40 | Vladimir Ivanov v Constantin Bittoun Kouzmine | 1-6,7-6,2-6 |
| ITF M15 St Petersburg | 2021/04/12 10:25 | Pavel Shchaya-Zubrov v Constantin Bittoun Kouzmine | 0-6,3-6 |
| 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 Sharm El Sheikh | 2021/04/05 10:00 | Lorenzo Rottoli v Lukas Palovic | 6-3,6-1 |
| ITF M15 Sharm El Sheikh | 2021/03/28 13:00 | Lukas Palovic v Volodymyr Uzhylovskyi | 7-6,5-7,8-10 |
| ITF M15 Bratislava | 2021/03/10 10:25 | Lukas Palovic v Kyrian Jacquet | 1-6,3-6 |
| ITF M15 Bratislava | 2021/03/04 09:25 | Lukas Palovic v Zsombor Piros | 3-6,2-6 |
| ITF M15 Bratislava | 2021/03/03 12:55 | Lukas Pokorny v Lukas Palovic | 6-7,5-7 |
| ITF M15 Sharm El Sheikh | 2021/02/01 08:00 | Lukas Palovic v Takashi Saito | 4-6,3-6 |
| ITF M15 Sharm El Sheikh | 2021/01/31 07:00 | Karlo Cubelic v Lukas Palovic | 6-3,3-6,1-10 |
| ITF M15 Bratislava | 2020/11/25 10:30 | Filip Misolic v Lukas Palovic | 7-6,3-6,7-6 |