Stadium: Court 2 Round: 25 Ground: Clay
| ITF M15 Vejle | 2021/07/26 08:00 | Adrian Oetzbach v Iiro Vasa | 6-3,7-5 |
| ITF M15 Esch/Alzette | 2021/07/19 08:55 | Marlon Vankan v Adrian Oetzbach | 6-3,6-7,10-6 |
| ITF M15 Esch/Alzette | 2021/07/18 09:45 | Rana-Roop Singh Bhullar v Adrian Oetzbach | 3-6,2-6 |
| ITF M15 Monastir | 2020/12/09 10:00 | Eliakim Coulibaly v Adrian Oetzbach | 6-2,6-4 |
| ITF M15 Monastir | 2020/12/07 13:30 | Tom Schonenberg v Adrian Oetzbach | 6-7,3-6 |
| ITF M15 Monastir | 2020/12/07 09:00 | Adrian Oetzbach v Alexander Kotzen | 6-2,6-4 |
| ITF M15 Monastir | 2020/11/30 12:00 | Adrian Oetzbach v Fausto Tabacco | 6-2,3-6,11-13 |
| ITF M15 Monastir | 2020/11/30 08:00 | Tom Schonenberg v Adrian Oetzbach | 4-6,4-6 |
| 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 |
| ITF M15 Sofia | 2021/07/06 11:05 | Francisco Comesana v Vasil Kirkov | 6-3,6-2 |
| ITF M15 Champaign | 2021/06/23 19:10 | Vasil Kirkov v Kyle Seelig | 6-4,3-6,6-7 |