| 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 Series TT | 2023/05/23 09:10 | Sven Happek v Albert Vilardell | L | 1-3 |
| Challenger Series TT | 2023/05/22 19:50 | Sven Happek v Aljaz Godec | L | 0-3 |
| Challenger Series TT | 2023/05/22 17:10 | Sven Happek v Kirill Fadeev | L | 1-3 |
| Challenger Series TT | 2023/05/22 14:30 | Michael Engelhardt v Sven Happek | L | 3-1 |
| Challenger Series TT | 2023/05/22 11:50 | Jeromy Loffler v Sven Happek | W | 0-3 |
| Challenger Series TT | 2023/05/22 09:50 | Sven Happek v Damian Zech | L | 0-3 |
| Challenger Series TT | 2023/05/22 07:50 | Sven Happek v Louis Price | W | 3-2 |
| Challenger Series TT | 2023/05/09 09:10 | Sven Happek v Humberto Manhani | L | 1-3 |
| Challenger Series TT | 2023/05/19 09:50 | Liang Qiu v Amirreza Abbasi | L | 0-3 |
| Challenger Series TT | 2023/05/19 06:30 | Liang Qiu v Antonin Gavlas | L | 0-3 |
| Challenger Series TT | 2023/05/18 17:50 | Liang Qiu v Louis Price | L | 0-3 |
| Challenger Series TT | 2023/05/18 16:30 | Liang Qiu v Peter Hribar | L | 1-3 |
| Challenger Series TT | 2023/05/18 11:50 | Liang Qiu v Marius Henninger | W | 3-0 |
| Challenger Series TT | 2023/05/18 09:10 | Liang Qiu v Florian Bluhm | L | 0-3 |
| Challenger Series TT | 2023/05/18 06:30 | Liang Qiu v Pekka Pelz | L | 2-3 |
| Challenger Series TT | 2023/03/21 13:50 | Rafael Turrini v Liang Qiu | L | 3-0 |