| 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 Series TT | 2022/02/01 13:50 | Josip Huzjak v Florian Bluhm | L | 0-3 |
| Challenger Ochsenhausen | 2022/02/01 12:25 | Amirreza Abbasi v Josip Huzjak | L | 3-1 |
| Challenger Series TT | 2022/02/01 10:10 | Samuel Amann v Josip Huzjak | W | 0-3 |
| Challenger Series TT | 2022/02/01 08:10 | Josip Huzjak v Jordy Piccolin | W | 3-1 |
| Challenger Series TT | 2022/01/31 20:10 | Amirreza Abbasi v Josip Huzjak | L | 3-1 |
| Challenger Series TT | 2022/01/31 17:30 | John Oyebode v Josip Huzjak | W | 1-3 |
| Challenger Series TT | 2022/01/31 14:50 | Josip Huzjak v Rafael Turrini | W | 3-0 |
| Challenger Series TT | 2022/01/31 11:30 | Josip Huzjak v Florian Bluhm | L | 2-3 |
| Challenger Ochsenhausen | 2022/01/28 13:50 | Evgueni Chtchetinine v Sven Happek | W | 1-3 |
| Challenger Ochsenhausen | 2022/01/28 13:05 | Alexander Valuch v Sven Happek | L | 3-0 |
| Challenger Ochsenhausen | 2022/01/28 11:30 | Sven Happek v Evgueni Chtchetinine | W | 3-0 |
| Challenger Ochsenhausen | 2022/01/28 08:50 | Sven Happek v Tal Israeli | L | 0-3 |
| Challenger Ochsenhausen | 2022/01/27 20:10 | Sven Happek v Alexander Valuch | L | 1-3 |
| Challenger Ochsenhausen | 2022/01/27 15:30 | Sven Happek v Richard Lukacs | W | 3-0 |
| Challenger Ochsenhausen | 2022/01/27 13:30 | Sven Happek v Alessandro Baciocchi | L | 2-3 |
| Challenger Ochsenhausen | 2022/01/27 10:10 | Luca Bressan v Sven Happek | W | 0-3 |