| Challenger Series TT | 2023/06/15 07:10 | Sven Happek v Liang Qiu | L | 2-3 |
| Challenger Series TT | 2022/12/19 16:10 | Sven Happek v Liang Qiu | W | 3-0 |
| Challenger Series TT | 2022/10/10 15:10 | Liang Qiu v Sven Happek | W | 1-3 |
| Challenger Series TT | 2022/09/19 11:10 | Sven Happek v Liang Qiu | L | 0-3 |
| Challenger Ochsenhausen | 2022/01/20 15:30 | Liang Qiu v Sven Happek | L | 3-1 |
| Challenger Ochsenhausen | 2021/12/01 10:10 | Sven Happek v Liang Qiu | L | 0-3 |
| Challenger Ochsenhausen | 2021/11/10 07:30 | Liang Qiu v Sven Happek | L | 3-1 |
| Challenger Ochsenhausen | 2021/10/27 06:30 | Sven Happek v Liang Qiu | L | 0-3 |
| Challenger Ochsenhausen | 2021/09/29 06:30 | Sven Happek v Liang Qiu | L | 0-3 |
| Challenger Ochsenhausen | 2021/03/31 07:10 | Liang Qiu v Sven Happek | L | 3-0 |
| Challenger Ochsenhausen | 2021/02/24 10:10 | Sven Happek v Liang Qiu | L | 0-3 |
| Challenger Ochsenhausen | 2021/01/28 08:50 | Sven Happek v Liang Qiu | W | 3-1 |
| Challenger Ochsenhausen | 2020/12/02 10:50 | Sven Happek v Liang Qiu | L | 1-3 |
| Challenger Ochsenhausen | 2020/11/18 13:30 | Sven Happek v Liang Qiu | L | 0-3 |
| Challenger Ochsenhausen | 2020/10/07 07:10 | Liang Qiu v Sven Happek | L | 3-1 |
| Challenger Ochsenhausen | 2020/07/20 07:50 | Liang Qiu v Sven Happek | W | 2-3 |
| Challenger Ochsenhausen | 2020/07/14 08:20 | Sven Happek v Liang Qiu | L | 0-3 |
| Challenger Ochsenhausen | 2020/06/17 08:40 | Sven Happek v Liang Qiu | L | 1-4 |
| Challenger Ochsenhausen | 2020/06/03 08:40 | Sven Happek v Liang Qiu | W | 4-1 |
| Challenger Ochsenhausen | 2020/05/22 14:10 | Sven Happek v Liang Qiu | L | 2-4 |
| Challenger Ochsenhausen | 2020/05/22 10:30 | Sven Happek v Liang Qiu | W | 4-3 |
| Challenger Ochsenhausen | 2020/04/27 10:30 | Liang Qiu v Sven Happek | L | 4-2 |