Stadium: Court 3 Round: 54 Ground: Hardcourt indoor
| ITF M15 Zlatibor | 2021/09/14 08:00 | Barun, Bozo v Pjevcevic, Petar | 6-4,0-6,9-11 |
| ITF M15 Ulcinj | 2021/08/30 07:30 | Barun, Bozo v Ioannis Xilas | 4-6,1-6 |
| ITF M15 Novi Sad | 2021/07/27 09:00 | Barun, Bozo v Charles Broom | 4-6,6-7 |
| ITF M15 Novi Sad | 2021/07/26 12:00 | Jirousek, Tomas v Barun, Bozo | 6-3,0-6,4-10 |
| ITF M15 Novi Sad | 2021/07/25 15:00 | Barun, Bozo v Postay, Alan | 6-2,6-3 |
| UTR Pro Tennis Series Zadar | 2021/07/04 07:00 | Barun, Bozo v Sinius, Warren | 6-1,6-0 |
| UTR Pro Tennis Series Zadar | 2021/07/03 12:00 | Barun, Bozo v Khomich, Aleksei | 7-6,6-0 |
| UTR Pro Tennis Series Zadar | 2021/07/02 08:00 | Zmak, Deni v Barun, Bozo | 6-2,6-2 |
| ITF - M15 Antalya | 2021/10/18 08:50 | Simon Sedliak v Lukas H Lilleengen | 3-6,2-6 |
| ITF - M15 Antalya | 2021/10/17 07:00 | Simon Sedliak v Arabaci, Mert | 6-4,6-1 |
| ITF - M15 Antalya | 2021/10/10 07:00 | Simon Sedliak v Ibrahim, Hasan | 1-6,2-6 |
| ITF M25 Budapest | 2021/09/26 07:00 | Simon Sedliak v Morris, Eric | 1-6,6-3,4-10 |
| ITF M15 Zilina | 2021/08/30 07:30 | Paul Valsecchi v Simon Sedliak | 7-5,7-5 |
| ITF M15 Bratislava | 2021/08/23 09:00 | Minarik, Kristof v Simon Sedliak | 6-2,6-0 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/02 11:05 | Matuszewski, Piotr v Simon Sedliak | 2-6,6-4,10-4 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/01 13:55 | Simon Sedliak v Samosi, Peter | 6-2,7-5 |