Stadium: Court 4 Round: 44 Ground: Clay
| ITF - M25 Velenje | 2021/07/05 12:05 | Michele Vianello v Dusan Rajic | 6-4,6-2 |
| ITF - M25 Velenje | 2021/07/04 07:30 | Inaki Cabrera Bello v Dusan Rajic | 1-6,4-6 |
| ITF - M25 Belgrad | 2021/06/28 07:00 | Edoardo Lavagno v Dusan Rajic | 6-1,6-2 |
| ITF - M25 Belgrad | 2021/06/27 07:00 | Dusan Rajic v Ivan Mikhaylyuk | 2-6,6-0,12-10 |
| ITF - M15 Brcko | 2021/05/21 13:05 | Dusan Rajic v Eric Vanshelboim | 3-6,1-6 |
| ITF - M15 Brcko | 2021/05/21 07:35 | Kristjan Tamm v Dusan Rajic | 4-6,5-7 |
| ITF - M15 Brcko | 2021/05/18 12:00 | Lazar Milicevic v Dusan Rajic | 7-6,6-4 |
| ITF - M15 Brcko | 2021/05/18 07:00 | Valentin Lapalu v Dusan Rajic | 1-6,6-3,6-10 |
| UTR Pro Tennis Series - Beograd | 2021/07/10 07:00 | Yaraslav Shyla v Dusan Obradovic | 1-6,6-2,6-4 |
| UTR Pro Tennis Series - Beograd | 2021/07/09 07:30 | Dusan Obradovic v Michalis Sakellaridis | 6-4,5-4 |
| UTR Pro Tennis Series - Beograd | 2021/07/07 10:30 | Dusan Obradovic v Olexiy Kolisnyk | 6-0,5-4 |
| UTR Pro Tennis Series - Beograd | 2021/07/06 12:00 | Dusan Obradovic v Constant De La Bassetiere | 6-1,3-6,5-2 |
| UTR Pro Tennis Series - Beograd | 2021/07/05 07:30 | Nikola Slavic v Dusan Obradovic | 6-7,6-7 |
| ITF - M25 Belgrad | 2021/06/29 07:00 | Jaimee Floyd Angele v Dusan Obradovic | 6-2,7-6 |
| ITF - M25 Belgrad | 2021/06/28 07:00 | Dusan Obradovic v Luka Pavlovic | 6-4,3-6,10-4 |
| ITF - M25 Belgrad | 2021/06/27 09:00 | Dusan Obradovic v Marat Sharipov | 6-3,6-1 |