Stadium: Court 2 Round: 54 Ground: Hardcourt indoor
| ITF M15 Ostrava | 2021/11/21 13:30 | Bozo Barun v Simon Sedliak | 7-6,6-3 |
| 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 |
| ITF M15 Ostrava | 2021/11/21 09:00 | Radovan Michalik v Christopher Patzanovsky | 4-6,7-5,8-10 |
| ITF M15 Heraklion | 2021/11/14 11:00 | Christopher Patzanovsky v Leopold Zima | 3-6,3-6 |
| ITF M15 Heraklion | 2021/11/09 07:00 | Kai Lemstra v Christopher Patzanovsky | 6-2,6-4 |
| ITF M15 Heraklion | 2021/11/08 09:00 | Moritz Poswiat v Christopher Patzanovsky | 5-7,6-1,8-10 |
| ITF M15 Heraklion | 2021/11/07 11:00 | Paulo Knippling v Christopher Patzanovsky | 2-6,2-6 |
| ITF M25 Hamburg | 2021/10/17 11:30 | Yannik Steinegger v Christopher Patzanovsky | 6-3,7-6 |
| ITF M25 Budapest | 2021/09/28 09:40 | Buvaysar Gadamauri v Christopher Patzanovsky | 6-1,6-2 |
| ITF M25 Budapest | 2021/09/27 10:25 | Christopher Patzanovsky v Zalan Sandor Savay | 6-3,6-1 |