| World Championship XD | 2021/11/23 22:00 | Lin/Zhang v Apolonia/Shao | W | 3-0 |
| World Championship XD | 2021/11/23 21:20 | Polansky/Matelova v Mittelham/Qiu | W | 1-3 |
| WTT Contender Tunisi DX | 2021/10/29 09:00 | Khanin/Trigolos v Mittelham/Qiu | L | 3-0 |
| WTT Contender Tunisi DX | 2021/10/28 13:30 | Abid/Zoghlami v Mittelham/Qiu | W | 0-3 |
| European Championships XD | 2021/06/25 19:00 | Balazova/Pistej v Mittelham/Qiu | W | 0-3 |
| European Championships XD | 2021/06/25 10:15 | Mittelham/Qiu v Lebesson/Yuan | W | 3-2 |
| European Championships XD | 2021/06/24 11:15 | Mittelham/Qiu v Yigenler/Yilmaz | W | 3-0 |
| European Championships XD | 2021/06/24 07:30 | Ionescu/Szocs v Mittelham/Qiu | W | 2-3 |
| European Championships XD | 2021/06/23 17:40 | Ecseki/Balint v Mittelham/Qiu | W | 0-3 |