Stadium: Court 3 Round: 44 Ground: Clay
| ITF M15 Sibenik | 2021/05/19 15:05 | Bozo Barun v Naoki Tajima | 6-7,1-6 |
| ITF M15 Prijedor | 2021/05/14 10:15 | Matheus Pucinelli De Almeida v Bozo Barun | 6-1,6-1 |
| ITF M15 Prijedor | 2021/05/11 08:00 | Matic Dimic v Bozo Barun | 2-6,6-2,7-10 |
| ITF M15 Prijedor | 2021/05/10 08:00 | Elgin Khoeblal v Bozo Barun | 2-6,5-7 |
| ITF M15 Prijedor | 2021/05/09 07:00 | Lilian Breut v Bozo Barun | 6-2,2-6,8-10 |
| ITF M15 Sibenik | 2021/04/21 12:40 | Alen Rogic-Hadzalic v Bozo Barun | 7-6,7-5 |
| Challenger Split | 2021/04/12 08:30 | Bozo Barun v Lukas Klein | 1-6,4-6 |
| Challenger Split Qual | 2021/04/11 11:30 | Gian Marco Moroni v Bozo Barun | 3-6,6-2,6-7 |
| ITF M15 Brcko | 2021/05/16 12:30 | Samuel M Arjona v Dusan Milanovic | 7-6,4-6,1-10 |
| ITF M15 Prijedor | 2021/05/09 07:00 | Samuel M Arjona v Federico Campana | 2-6,3-6 |
| ITF M15 Las Palmas | 2021/04/25 09:00 | Nikita Alosha v Samuel M Arjona | 7-6,2-6,12-10 |
| ITF M25 Reus | 2021/04/11 10:00 | Alexander Weis v Samuel M Arjona | 7-6,5-7,10-4 |
| ITF M25 La Nucia | 2021/03/14 13:00 | Samuel M Arjona v Jesus Echevarri | 6-7,6-2,7-10 |
| ITF M15 La Nucia | 2021/03/09 09:00 | Samuel M Arjona v Simon Beaupain | 1-6,2-6 |
| ITF M15 La Nucia | 2021/03/08 09:00 | Egill Sigurdsson v Samuel M Arjona | 2-6,3-6 |
| ITF M25 Murcia | 2020/03/02 15:30 | Oleg Prihodko v Samuel M Arjona | 7-5,7-6 |