| ITF M25 Falun | 2021/09/27 12:00 | Marius Ruzgas v Mans Dahlberg | 5-7,4-6 |
| ITF M25 Jonkoping | 2021/09/20 10:30 | Marius Ruzgas v Mats Rosenkranz | 5-7,5-7 |
| ITF M15 Frederiksberg | 2021/08/04 08:00 | Marius Ruzgas v Vasil Kirkov | 2-6,2-6 |
| ITF M15 Vejle | 2021/07/27 09:15 | Marius Ruzgas v Alexander Kotzen | 2-6,6-4,3-6 |
| UTR Pro Tennis Series Copenhagen | 2021/06/19 10:00 | Daniel De Jonge v Marius Ruzgas | 3-6,7-6,6-1 |
| UTR Pro Tennis Series Copenhagen | 2021/06/18 12:30 | Philip Hjorth v Marius Ruzgas | 6-4,1-6,3-6 |
| UTR Pro Tennis Series Copenhagen | 2021/06/17 12:30 | Ludvig Aaes v Marius Ruzgas | 2-6,6-6 |
| UTR Pro Tennis Series Copenhagen | 2021/06/15 11:00 | Dominik Palan v Marius Ruzgas | 3-6,4-5 |
| ITF M15 Frederiksberg | 2021/08/01 10:00 | Gabriel Decamps v Simon Friis Soendergaard | 6-4,6-2 |
| ITF USA F27 | 2017/08/09 18:00 | Genaro Alberto Olivieri v Simon Friis Soendergaard | 6-4,5-2 |
| ITF USA F27 Qual | 2017/08/07 16:25 | Simon Friis Soendergaard v Francisco Dias | 7-6,2-6,6-3 |