| UTR Pro Tennis Series Zadar | 2021/07/03 12:00 | Bozo Barun v Aleksei Khomich | 7-6,6-0 |
| UTR Pro Tennis Series Zadar | 2021/07/02 08:00 | Deni Zmak v Bozo Barun | 6-2,6-2 |
| UTR Pro Tennis Series Zadar | 2021/07/01 14:00 | Arthus De La Bassetiere v Bozo Barun | 7-6,6-2 |
| UTR Pro Tennis Series Zadar | 2021/06/30 12:00 | Ihor Dudun v Bozo Barun | 1-6,1-5 |
| UTR ProTennis Series Zadar | 2021/06/28 09:30 | Vito Tonejc v Bozo Barun | 6-3,3-6,5-3 |
| ITF M15 Sarajevo | 2021/06/02 10:50 | Bozo Barun v Matheus P De Almeida | 3-6,2-6 |
| ITF M15 Sarajevo | 2021/06/01 10:30 | Bozo Barun v Matej Galik | 6-3,4-6,10-7 |
| ITF M15 Sarajevo | 2021/05/31 12:00 | Bozo Barun v Nicolas Zanellato | 6-3,6-1 |
| UTR Pro Tennis Series Zadar | 2021/07/01 09:30 | Warren Sinius v Jerko Brkic | 6-3,6-5 |
| UTR Pro Tennis Series Zadar | 2021/06/30 08:00 | Warren Sinius v Constant De La Bassetiere | 3-6,6-6 |
| UTR Pro Tennis Series Zadar | 2021/06/29 11:00 | Warren Sinius v Frane Nincevic | 5-7,3-6 |
| UTR Pro Tennis Series Zadar | 2021/06/28 12:30 | Warren Sinius v Josip Krstanovic | 2-6,1-5 |
| UTR Pro Tennis Series - Kodaň | 2021/06/20 08:00 | Alexander Konigsfeldt v Warren Sinius | 6-1,6-0 |
| UTR Pro Tennis Series - Kodaň | 2021/06/19 07:00 | Nikolaj Katic v Warren Sinius | 4-5 |
| UTR Pro Tennis Series - Kodaň | 2021/06/18 12:30 | Ludvig Aaes v Warren Sinius | 7-6,6-2 |
| UTR Pro Tennis Series - Kodaň | 2021/06/17 09:30 | Dominik Palan v Warren Sinius | 2-2 |