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