| ITF M15 Heraklion | 2021/11/02 08:30 | Marius Ruzgas v Ryan James Storrie | 4-6,1-6 |
| UTR Pro Tennis Series Copenhagen | 2021/10/24 07:00 | Vilhelm Fridell v Marius Ruzgas | 2-6,6-3,6-7 |
| UTR Pro Tennis Series Copenhagen | 2021/10/23 09:30 | Arslan Temirhanov v Marius Ruzgas | 3-6,5-7 |
| UTR Pro Tennis Series Copenhagen | 2021/10/22 08:30 | Adam Heinonen v Marius Ruzgas | 3-6,6-3,3-5 |
| UTR Pro Tennis Series Copenhagen | 2021/10/21 08:30 | Alexander Stage v Marius Ruzgas | 2-6,2-6 |
| 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 |