Stadium: CEE Logistics-C8 Round: 26 Ground: Clay
| ITF M25 Marburg | 2021/07/05 08:00 | Guy Den Heijer v Maximilian Homberg | 6-7,6-2,10-8 |
| 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 The Hague | 2021/06/27 08:00 | Mick Veldheer v Jarno Jans | 6-4,6-1 |
| ITF M25 Klosters | 2021/06/25 08:55 | Dominic Stephan Stricker v Mick Veldheer | 6-2,6-0 |
| ITF M25 Klosters | 2021/06/24 06:55 | Mick Veldheer v Sandro Ehrat | 6-3,5-7,6-3 |
| ITF M25 Klosters | 2021/06/22 09:45 | Mick Veldheer v Damien Wenger | 1-6,6-2,6-4 |
| ITF M15 Antalya | 2021/05/19 08:50 | Davide Galoppini v Mick Veldheer | 7-5,7-5 |