| UTR Pro Copenhagen | 2023/05/31 06:00 | Christian Sigsgaard v Olle S Lidholt | 6-1,6-2 |
| UTR Pro Copenhagen | 2023/05/30 07:30 | Christian Sigsgaard v Julian Cundom | 6-1,6-0 |
| UTR Pro Copenhagen | 2023/05/29 07:30 | Christian Sigsgaard v Petr Iamachkine | 6-4,6-3 |
| UTR Pro Copenhagen | 2023/05/28 07:30 | Christian Sigsgaard v Hans Albert Schubert | 6-0,6-2 |
| ITF M25 Nottingham Qual | 2023/04/30 09:00 | Christian Sigsgaard v Ioannis Xilas | 6-7,2-6 |
| ITF M25 Nottingham | 2023/04/28 12:30 | Christian Sigsgaard v August Holmgren | 5-7,4-6 |
| ITF M25 Nottingham | 2023/04/27 14:05 | Clement Chidekh v Christian Sigsgaard | 4-6,3-6 |
| ITF M25 Nottingham | 2023/04/25 10:25 | Christian Sigsgaard v Mark Whitehouse | 6-4,6-1 |
| UTR Pro Copenhagen | 2023/06/01 06:00 | Adam Heinonen v Domen Gostincar | 6-2,6-2 |
| UTR Pro Copenhagen | 2023/05/31 09:00 | Adam Heinonen v Masato Perera | 5-7,6-0,6-1 |
| UTR Pro Copenhagen | 2023/05/30 06:00 | Marshall Tutu v Adam Heinonen | 4-6,6-3,3-6 |
| UTR Pro Copenhagen | 2023/05/29 09:00 | Cornelius Alexander Shalmi v Adam Heinonen | 1-6,3-6 |
| ITF M15 Kalmar | 2023/05/18 10:20 | Max Dahlin v Adam Heinonen | 6-3,2-6,6-4 |
| ITF M15 Kalmar | 2023/05/17 09:00 | Arslanbek Temirhanov v Adam Heinonen | 6-7,4-6 |
| ITF M25 Varnamo | 2023/05/09 08:15 | Adam Heinonen v Sebastian Eriksson | 6-4,2-6,7-10 |
| ITF M25 Varnamo | 2023/05/08 09:45 | Adam Heinonen v Kiyan Santino Kasemi | 6-1,6-1 |