Stadium: Court 4 Round: 44 Ground: Clay
| ITF - M25 Kiseljak | 2021/05/23 10:45 | Barun, Bozo v Martinez Arjona, Samuel | 6-3,6-2 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/05/19 15:05 | Barun, Bozo v Naoki Tajima | 6-7,1-6 |
| ITF - M15 Prijedor | 2021/05/14 10:15 | Matheus P De Almeida v Barun, Bozo | 6-1,6-1 |
| ITF - M15 Prijedor | 2021/05/11 08:00 | Matic Dimic v Barun, Bozo | 2-6,6-2,7-10 |
| ITF - M15 Prijedor | 2021/05/10 08:00 | Elgin Khoeblal v Barun, Bozo | 2-6,5-7 |
| ITF - M15 Prijedor | 2021/05/09 07:00 | Breut, Lilian v Barun, Bozo | 6-2,2-6,8-10 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/04/21 12:40 | Rogic Hadzalic, Alen v Barun, Bozo | 7-6,7-5 |
| Challenger - Split | 2021/04/12 08:30 | Barun, Bozo v Lukas Klein | 1-6,4-6 |
| ITF - M25 Kiseljak | 2021/05/23 13:15 | Drazen Petrovic v Suntic, Sabit | 6-3,5-7,10-5 |
| ITF - M15 Brcko | 2021/05/18 09:30 | Drazen Petrovic v Lazar Vojinovic | 2-6,3-6 |
| ITF - M15 Brcko | 2021/05/17 15:30 | Boris Butulija v Drazen Petrovic | 2-6,5-7 |
| ITF - M15 Brcko | 2021/05/16 14:00 | Drazen Petrovic v Macura, Milan | 6-2,6-1 |
| ITF - M15 Prijedor | 2021/05/09 09:30 | Drazen Petrovic v Lazar Vojinovic | 3-6,6-0,4-10 |
| ITF - M15 Antalya | 2021/01/04 07:00 | Jorge Martinez Martinez v Drazen Petrovic | 6-0,6-1 |
| ITF - M15 Antalya | 2021/01/03 07:00 | Sven Corbinais v Drazen Petrovic | 4-6,2-6 |