Stadium: Court 8 Round: 25 Ground: Clay
| 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 |
| UTR Pro Tennis Series Copenhagen | 2021/06/14 09:30 | Marius Ruzgas v Warren Sinius | 6-2,6-0 |
| ITF M15 Monastir | 2021/04/26 09:00 | Marius Ruzgas v Viktor Jovic | 3-6,3-6 |
| ITF M15 Monastir | 2021/04/25 12:30 | Marius Ruzgas v Mhamed Affes | 6-1,6-2 |
| ITF M15 Vejle | 2021/07/30 07:55 | Karl Friberg v Vasil Kirkov | 6-2,7-6 |
| ITF M15 Vejle | 2021/07/27 12:20 | Adrian Oetzbach v Vasil Kirkov | 7-5,3-6,3-6 |
| UTR Pro Tennis Series Pazardzhik | 2021/07/18 07:30 | Vasil Kirkov v Valentin Vanta | 6-3,7-5 |
| UTR Pro Tennis Series Pazardzhik | 2021/07/17 07:00 | Vasil Kirkov v Adriano Dzhenev | 6-3,6-2 |
| UTR Pro Tennis Series Pazardzhik | 2021/07/16 06:00 | Vasil Kirkov v Yanaki Milev | 6-1,6-1 |
| UTR Pro Tennis Series Pazardzhik | 2021/07/14 07:30 | Vasil Kirkov v Aleksandr Braynin | 7-5,5-1 |
| UTR Pro Tennis Series Pazardzhik | 2021/07/13 10:30 | Vasil Kirkov v Gorazd Srbljak | 2-6,6-3,1-6 |
| UTR Pro Tennis Series Pazardzhik | 2021/07/12 06:00 | Vladimir Popov v Vasil Kirkov | 2-6,4-6 |