Stadium: Court 2 Round: 14 Ground: Grass
| Challenger Nottingham | 2021/06/19 11:30 | Mackenzie McDonald v Anton Matusevich | 6-2,6-3 |
| Challenger Nottingham | 2021/06/16 12:35 | Thomas Fabbiano v Anton Matusevich | 6-7,4-6 |
| Challenger Nottingham | 2021/06/14 15:30 | Anton Matusevich v Mikael Ymer | 6-3,7-5 |
| Challenger Nottingham | 2021/06/06 16:45 | Ramkumar Ramanathan v Anton Matusevich | 2-6,7-6,7-6 |
| ITF M15 Helsinki | 2021/06/02 10:20 | Bruno Kuzuhara v Anton Matusevich | 4-6,6-4,7-5 |
| ITF M15 Kouvola | 2021/05/30 08:00 | Anton Matusevich v Naoki Tajima | 6-1,4-6,6-0 |
| ITF M15 Kouvola | 2021/05/29 07:00 | Alessandro Bega v Anton Matusevich | 4-6,4-6 |
| ITF M15 Kouvola | 2021/05/28 07:15 | Anton Matusevich v Zsombor Velcz | 6-1,6-3 |