Stadium: Court 5 Round: 26 Ground: Clay
| ITF M25 - Telfs - Herrdubbel | 2021/07/15 15:15 | Novansky/Palovic v Kopp/Veldheer | 2-6,6-7 |
| ITF M25 - Telfs - Herrdubbel | 2021/07/13 12:00 | Novansky/Palovic v Kopp/Veldheer | 2-6,6-7 |
| ITF M15 - Antalya - Herrdubbel | 2021/05/18 11:00 | Kopp/Veldheer v Luz/Roveri Sidney | 6-2,2-6,7-10 |
| ITF M15 - Antalya - Herrdubbel | 2021/05/13 12:50 | Friberg/Yitbarek v Kopp/Veldheer | 6-2,6-4 |
| ITF M15 - Antalya - Herrdubbel | 2021/05/11 12:30 | Kopp/Veldheer v Forti/Galoppini | 6-1,6-4 |
| ITF M15 - Antalya - Herrdubbel | 2021/05/06 12:50 | Kopp/Veldheer v Luz/Roveri Sidney | 2-6,2-6 |
| ITF M15 - Antalya - Herrdubbel | 2021/05/05 12:30 | Glinka/Tkemaladze v Kopp/Veldheer | 4-6,2-6 |
| ITF M15 - Antalya - Herrdubbel | 2021/02/24 12:50 | P De Almeida/Reis da Silva v Kopp/Veldheer | 6-2,6-3 |