| UTR Pro Tennis Series Copenhagen | 2021/10/20 10:00 | Drew Van Orderlain v Alexander Stage | 6-4,3-6,6-3 |
| UTR Pro Tennis Series Copenhagen | 2021/10/19 07:00 | Adam Heinonen v Alexander Stage | 6-3,6-3 |
| UTR Pro Tennis Series Copenhagen | 2021/10/19 08:30 | Drew Van Orderlain v Marius Ruzgas | 3-6,4-6 |
| UTR Pro Tennis Series Copenhagen | 2021/10/18 10:00 | Marius Ruzgas v Simon Friis Soendergaard | 2-6,4-5 |
| 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 |