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