Stadium: Court 2 Round: 26 Ground: Clay
| ITF - M25 Kiseljak | 2021/05/26 09:00 | Micov, Stefan v Barun, Bozo | 4-6,1-6 |
| 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 | Barun, Bozo v Drazen Petrovic | 6-1,6-3 |
| 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 - M25 Kiseljak | 2021/05/26 08:00 | Breut, Lilian v Aldin Setkic | 3-6,3-6 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/05/19 16:20 | Aldin Setkic v Timo Legout | 6-4,4-6,6-7 |
| ITF - M15 Prijedor | 2021/05/16 08:55 | Aldin Setkic v Nerman Fatic | 6-3,4-6,6-2 |
| ITF - M15 Prijedor | 2021/05/15 14:30 | Aldin Setkic v Denis Yevseyev | 7-5,6-2 |
| ITF - M15 Prijedor | 2021/05/14 11:00 | Rogic Hadzalic, Alen v Aldin Setkic | 6-3,2-6,5-7 |
| ITF - M15 Prijedor | 2021/05/14 07:00 | Joao Lucas Reis da Silva v Aldin Setkic | 2-6,2-6 |
| ITF - M15 Prijedor | 2021/05/13 07:50 | Kawakami, Rimpei v Aldin Setkic | 2-6,4-6 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/04/25 09:00 | David Pichler v Aldin Setkic | 6-7,3-6 |