Stadium: Court 11 Round: 62 Ground: Hardcourt outdoor
| ITF M25 Sintra | 2021/09/07 10:45 | Alastair Gray v Korsgaard, Henrik Heise | 6-1,6-4 |
| ITF M25 Sintra | 2021/09/06 13:30 | Paulo A S Dos Santos v Korsgaard, Henrik Heise | 7-5,5-7,6-10 |
| ITF M15 Vejle | 2021/07/29 14:35 | Korsgaard, Henrik Heise v Christian Sigsgaard | 7-5,6-2 |
| ITF M15 Vejle | 2021/07/27 17:20 | Leonardo Catani v Korsgaard, Henrik Heise | 3-6,3-6 |
| UTR Pro Tennis Series Copenhagen | 2021/06/19 08:30 | Dominik Palan v Korsgaard, Henrik Heise | 6-7,5-2 |
| UTR Pro Tennis Series Copenhagen | 2021/06/18 08:00 | Henrik Atlevi v Korsgaard, Henrik Heise | 0-6,3-6 |
| UTR Pro Tennis Series Copenhagen | 2021/06/17 08:00 | Landa, Maxim v Korsgaard, Henrik Heise | 1-6,4-6 |
| UTR Pro Tennis Series Copenhagen | 2021/06/16 09:30 | Jorgensen, Sebastian Grundtvig v Korsgaard, Henrik Heise | 6-3,6-5 |
| ITF M25 Eupen | 2021/09/07 07:30 | Galarza, Juan Ignacio v Jip Van Assendelft | 4-6,6-2,10-3 |
| ITF M25 Eupen | 2021/09/06 09:15 | Jip Van Assendelft v Weng, Jing Long | 6-4,6-1 |
| ITF M25 Eupen | 2021/09/05 12:00 | Jip Van Assendelft v Hoogland, Joris | 6-2,6-1 |
| ITF M25 Alkmaar | 2021/06/20 12:00 | Jip Van Assendelft v Dhoe, Benjamin | 2-6,3-6 |
| ITF - M15 Antalya | 2021/05/30 07:30 | Jip Van Assendelft v Lema, Nicolas Agustin | 4-6,7-6,10-12 |
| ITF - M15 Antalya | 2021/05/24 10:00 | Jip Van Assendelft v Albertoni, Davide | 2-6,1-6 |
| ITF - M15 Antalya | 2021/05/23 07:00 | John Sperle v Jip Van Assendelft | 5-7,7-5,4-10 |
| ITF - M15 Monastir | 2021/04/11 10:00 | Jip Van Assendelft v Matuszewski, Piotr | 5-7,4-6 |