| Challenger Series TT | 2022/02/25 07:30 | Sven Happek v Josip Huzjak | L | 3-2 |
| Challenger Ochsenhausen | 2021/12/15 10:10 | Sven Happek v Josip Huzjak | W | 2-3 |
| Challenger Ochsenhausen | 2021/12/03 08:50 | Sven Happek v Josip Huzjak | L | 3-2 |
| Challenger Ochsenhausen | 2021/07/14 11:50 | Sven Happek v Josip Huzjak | L | 3-1 |
| Challenger Ochsenhausen | 2021/03/31 09:50 | Josip Huzjak v Sven Happek | L | 2-3 |
| Challenger Ochsenhausen | 2021/03/10 10:50 | Sven Happek v Josip Huzjak | L | 3-1 |
| Challenger Ochsenhausen | 2021/01/29 08:50 | Sven Happek v Josip Huzjak | W | 1-3 |
| Challenger Ochsenhausen | 2020/04/29 10:30 | Sven Happek v Josip Huzjak | L | 4-0 |
| Challenger Ochsenhausen | 2020/03/17 14:15 | Josip Huzjak v Sven Happek | L | 0-3 |
| Challenger Ochsenhausen | 2020/03/16 10:50 | Sven Happek v Josip Huzjak | W | 2-3 |
| Challenger Ochsenhausen | 2020/02/06 08:50 | Sven Happek v Josip Huzjak | L | 3-0 |
| Challenger Ochsenhausen | 2020/02/04 08:40 | Sven Happek v Josip Huzjak | L | 3-2 |
| Challenger Ochsenhausen | 2020/01/09 12:10 | Josip Huzjak v Sven Happek | W | 3-0 |
| Challenger Ochsenhausen | 2019/07/10 10:30 | Josip Huzjak v Sven Happek | L | 2-3 |
| Challenger Ochsenhausen | 2019/07/09 07:40 | Sven Happek v Josip Huzjak | L | 3-0 |
| Challenger Ochsenhausen | 2019/05/20 18:00 | Josip Huzjak v Sven Happek | L | 1-3 |
| Challenger Ochsenhausen | 2018/11/22 10:50 | Sven Happek v Josip Huzjak | L | 3-0 |
| Challenger Ochsenhausen | 2018/05/18 08:30 | Josip Huzjak v Sven Happek | W | 3-0 |
| Challenger Ochsenhausen | 2017/11/22 08:10 | Josip Huzjak v Sven Happek | W | 3-2 |
| Challenger Ochsenhausen | 2017/07/20 09:10 | Josip Huzjak v Sven Happek | L | 0-3 |
| Challenger Ochsenhausen | 2017/05/12 10:30 | Sven Happek v Josip Huzjak | L | 3-1 |
| Challenger Ochsenhausen | 2017/01/11 10:10 | Josip Huzjak v Sven Happek | W | 3-1 |