Stadium: Court 1 Round: 44 Ground: Clay
| ITF M25 Belgrade | 2021/06/27 09:00 | Boris Butulija v Luka Pavlovic | 4-6,3-6 |
| ITF M15 Skopje | 2021/06/07 07:00 | Cungu, Rrezart v Boris Butulija | 6-1,6-4 |
| ITF M15 Skopje | 2021/06/01 09:30 | Petr Michnev v Boris Butulija | 6-3,6-2 |
| ITF M15 Skopje | 2021/05/30 14:00 | Dian Nedev v Boris Butulija | 6-4,4-6,6-10 |
| ITF - M15 Brcko | 2021/05/17 15:30 | Boris Butulija v Drazen Petrovic | 2-6,5-7 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/04/19 12:15 | Ondrej Horak v Boris Butulija | 6-2,7-6 |
| Challenger Belgrade | 2021/04/11 10:00 | Dmitry Popko v Boris Butulija | 6-2,6-1 |
| ITF - M15 Antalya | 2021/03/21 07:00 | Boris Butulija v Bautista Vilicich | 6-4,5-7,9-11 |
| ITF M25 Kiseljak | 2021/05/25 08:00 | Barun, Bozo v Zivotic, Goran | 6-0,6-0 |
| ITF M25 Kiseljak | 2021/05/24 11:00 | Tadija Radovanovic v Zivotic, Goran | 3-6,6-4,3-10 |
| ITF M25 Kiseljak | 2021/05/23 12:00 | Zugic, Matija v Zivotic, Goran | 2-6,1-6 |
| ITF - M15 Antalya | 2020/12/06 07:00 | Zivotic, Goran v Michalis Sakellaridis | 4-6,4-6 |
| ITF - M15 Antalya | 2020/11/30 12:30 | Giovanni Oradini v Zivotic, Goran | 6-1,6-2 |
| Eastern European Championship | 2020/06/24 12:00 | Zivotic, Goran v Tadic, Vladan | 6-7,2-6 |
| Eastern European Championship | 2020/06/16 09:20 | Laslo Djere v Zivotic, Goran | 6-0,6-0 |
| Eastern European Championship | 2020/06/15 18:00 | Zivotic, Goran v Ergi Kirkin | 1-6,3-6 |