Stadium: Court 1 Round: 26 Ground: Hardcourt outdoor
| ITF M15 Vejle | 2021/07/29 16:30 | Guy Den Ouden v Mick Veldheer | 6-4,6-0 |
| ITF M15 Vejle | 2021/07/28 12:45 | Gabriel Decamps v Mick Veldheer | 3-6,1-6 |
| ITF M15 Esch/Alzette | 2021/07/22 09:55 | Nicholas David Ionel v Mick Veldheer | 7-6,1-6,6-4 |
| ITF M15 Esch/Alzette | 2021/07/21 11:50 | Marlon Vankan v Mick Veldheer | 3-6,6-0,6-7 |
| ITF M15 Esch/Alzette | 2021/07/20 15:50 | Kirill Kivattsev v Mick Veldheer | 4-6,3-6 |
| ITF M25 Telfs | 2021/07/16 08:50 | Bogdan Ionut Apostol v Mick Veldheer | 6-4,5-7,7-5 |
| ITF M25 Telfs | 2021/07/13 09:20 | Mick Veldheer v Alibek Kachmazov | 6-4,6-0 |
| ITF M25 The Hague | 2021/06/28 10:05 | Mick Veldheer v Sidane Pontjodikromo | 5-7,3-6 |
| ITF M25 Idanha-A-Nova | 2021/07/23 09:00 | Anton Matusevich v Gilbert S K Junior | 3-6,3-6 |
| ITF M25 Idanha-A-Nova | 2021/07/22 11:55 | Anton Matusevich v Luis Faria | 6-3,2-6,7-6 |
| ITF M25 Idanha-A-Nova | 2021/07/20 10:45 | Anton Matusevich v Naoki Tajima | 6-3,7-5 |
| ITF M25 Idanha-A-Nova | 2021/07/17 08:30 | Nicolas Moreno De Alboran v Anton Matusevich | 7-6,6-4 |
| ITF M25 Idanha-A-Nova | 2021/07/16 10:00 | Simon Carr v Anton Matusevich | 4-6,6-4,4-6 |
| ITF M25 Idanha-A-Nova | 2021/07/15 11:30 | Garrett Johns v Anton Matusevich | 3-6,6-1,6-7 |
| ITF M25 Idanha-A-Nova | 2021/07/13 12:15 | Thomas Fancutt v Anton Matusevich | 4-6,6-7 |
| Wimbledon | 2021/06/24 12:05 | Bernabe Zapata Miralles v Anton Matusevich | 6-2,3-6,7-6,6-7,6-3 |