Stadium: Court 1 Round: 25 Ground: Clay
| ITF M25 Velenje | 2021/07/06 08:00 | Domagoj Biljesko v Nicolas Parizzia | 6-3,7-5 |
| ITF M25 Velenje | 2021/07/05 09:00 | Domagoj Biljesko v Tadija Radovanovic | 6-4,4-6,11-9 |
| ITF M15 Sarajevo | 2021/06/03 10:30 | Domagoj Biljesko v Hernan Casanova | 2-6,3-6 |
| ITF M15 Sarajevo | 2021/06/02 15:55 | Zsombor Velcz v Domagoj Biljesko | 7-6,2-6,5-7 |
| ITF M15 Sarajevo | 2021/06/01 09:00 | Domagoj Biljesko v Michele Vianello | 6-3,6-4 |
| ITF M15 Sarajevo | 2021/05/31 12:00 | Domagoj Biljesko v Stevan Popovic | 6-1,6-2 |
| ITF M25 Kiseljak | 2021/05/26 10:00 | Domagoj Biljesko v Tim Heger | 6-7,6-2,3-6 |
| ITF M15 Brcko | 2021/05/21 11:20 | Artem Dubrivnyy v Domagoj Biljesko | 6-4,7-6 |