Stadium: Court 1 Round: 26 Ground: Clay
| 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 |
| UTR Pro Tennis Series Copenhagen | 2021/06/14 09:30 | Sren Borup Wedege v Korsgaard, Henrik Heise | 6-2,3-6,4-3 |
| Ystad, Singles M-ITF-SWE-03A | 2019/08/07 13:00 | Korsgaard, Henrik Heise v Niklas-Salminen, Patrick | 4-6,2-6 |
| Ystad, Singles M-ITF-SWE-03A | 2019/08/06 10:15 | Ahren Moonga, Eric v Korsgaard, Henrik Heise | 1-6,4-6 |
| ITF M15 Vejle | 2021/07/28 12:50 | Christian Sigsgaard v Ryan Nijboer | 6-3,6-2 |
| ITF - M15 Héraklion | 2021/05/31 06:30 | Christian Sigsgaard v Sean Hodkin | 2-6,7-5,6-10 |
| ITF - M15 Héraklion | 2021/05/30 09:00 | Dimic, Matic v Christian Sigsgaard | 3-6,2-6 |
| ITF - M15 Tbilisi | 2021/05/22 06:00 | Christian Sigsgaard v Alexander Shevchenko | 6-7,6-7 |
| ITF - M15 Tbilisi | 2021/05/21 06:00 | Christian Sigsgaard v Benjamin Lock | 7-5,6-1 |
| ITF - M15 Tbilisi | 2021/05/20 06:00 | Christian Sigsgaard v Dzhavakian, Yurii | 6-2,6-4 |
| ITF - M15 Tbilisi | 2021/05/19 07:25 | Fayziev, Sanjar v Christian Sigsgaard | 4-6,3-6 |
| ITF - M15 Tbilisi | 2021/05/17 06:00 | Piotr Grynkowski v Christian Sigsgaard | 3-6,3-6 |