| WTT Contender Lima - Mixed double | 2022/06/16 15:00 | Mittelham/Qiu v Gunduz/Altinkaya | W | 3-0 |
| European Games XD | 2023/06/23 11:30 | Mittelham/Qiu v Ni/Mladenovic | W | 3-1 |
| VM i bordtennis - Mixed double | 2023/05/23 16:30 | Gauzy/Pavade v Mittelham/Qiu | L | 3-2 |
| VM i bordtennis - Mixed double | 2023/05/22 16:30 | Liang/Zhang v Mittelham/Qiu | W | 0-3 |
| VM i bordtennis - Mixed double | 2023/05/21 12:50 | Yigenler/Yilmaz v Mittelham/Qiu | W | 1-3 |
| WTT Singapore Smash - Mixed double | 2023/03/11 11:30 | Mittelham/Qiu v Ishiy/Takahashi | L | 1-3 |
| WTT Contender Durban XD | 2023/01/12 08:00 | Mittelham/Qiu v Xue/Qian | L | 1-3 |
| European Championships XD | 2022/08/14 12:15 | Mittelham/Qiu v Gardos/Polcanova | L | 1-3 |
| European Championships XD | 2022/08/14 08:05 | Mittelham/Qiu v Moregard/Bergstrom | W | 3-2 |
| VM i bordtennis - Mixed double | 2023/05/21 18:00 | Ionescu/Szocs v Gunduz/Altinkaya | L | 3-0 |
| WTT Feeder Antalya XD | 2023/03/30 07:00 | Gunduz/Altinkaya v Levajac/Lupulesku | L | 0-3 |
| WTT Feeder Antalya XD | 2023/03/29 07:35 | Gunduz/Altinkaya v Choong/Lyne | W | 3-2 |
| European Championships XD | 2022/08/14 07:30 | Dyjas/Partyka v Gunduz/Altinkaya | L | 3-0 |
| European Championships XD | 2022/08/13 12:45 | Gunduz/Altinkaya v Alexandrov/Trifonova | W | 3-1 |
| WTT Contender - Tunis - Mixed double | 2022/08/04 11:00 | Feng/Chen v Gunduz/Altinkaya | L | 3-0 |
| WTT Contender - Tunis - Mixed double | 2022/08/03 16:00 | Tanviriyavechakul/Sawettabut v Gunduz/Altinkaya | W | 0-3 |
| WTT Contender Lima - Mixed double | 2022/06/16 15:00 | Mittelham/Qiu v Gunduz/Altinkaya | L | 3-0 |