Stadium: Court 1 Round: 26 Ground: Clay
| ITF M25 Frankfurt nad Mohanem | 2021/08/10 13:55 | Tobias Simon v Christian Sigsgaard | 3-6,3-6 |
| ITF M15 Frederiksberg | 2021/08/06 09:00 | Jonathan Mridha v Christian Sigsgaard | 6-4,6-4 |
| ITF M15 Frederiksberg | 2021/08/05 10:25 | Christian Sigsgaard v Daniel De Jonge | 6-4,7-6 |
| ITF M15 Frederiksberg | 2021/08/03 09:45 | Christian Sigsgaard v Giorgio Ricca | 6-3,6-3 |
| ITF M15 Vejle | 2021/07/29 14:35 | Henrik Heise Korsgaard v Christian Sigsgaard | 7-5,6-2 |
| ITF M15 Vejle | 2021/07/28 12:50 | Christian Sigsgaard v Ryan Nijboer | 6-3,6-2 |
| ITF M15 Heráklion | 2021/05/31 06:30 | Christian Sigsgaard v Sean Hodkin | 2-6,7-5,6-10 |
| ITF M15 Heráklion | 2021/05/30 09:00 | Matic Dimic v Christian Sigsgaard | 3-6,2-6 |
| ITF M25 Frankfurt nad Mohanem | 2021/08/10 13:50 | Daniel Dutra Da Silva v Alexis Gautier | 6-0,6-3 |
| ITF M25 Bolzano | 2021/08/03 08:30 | Alexander Weis v Daniel Dutra Da Silva | 7-6,7-6 |
| ITF M25 Denia | 2021/07/30 08:00 | Daniel Dutra Da Silva v Carlos Lopez Montagud | 3-6,6-7 |
| ITF M25 Denia | 2021/07/29 09:30 | Antoine Escoffier v Daniel Dutra Da Silva | 6-3,3-6,2-6 |
| ITF M25 Denia | 2021/07/28 07:55 | Lorenzo Joaquin Rodriguez v Daniel Dutra Da Silva | 6-7,1-6 |
| ITF M25 Velenje | 2021/07/06 12:55 | Daniel Dutra Da Silva v Maj Premzl | 6-2,7-5 |
| ITF M25 Vratislav | 2021/07/01 09:00 | Alessandro Bega v Daniel Dutra Da Silva | 3-6,1-6 |
| ITF M25 Vratislav | 2021/06/30 12:55 | Carl Soderlund v Daniel Dutra Da Silva | 5-7,3-6 |