| European Championships | 2022/08/16 14:30 | Ibrahim Gunduz v Giorgos Konstantinopoulos | L | 3-0 |
| European Championships | 2022/08/16 10:35 | Carlos Caballero v Giorgos Konstantinopoulos | W | 1-3 |
| European Championships | 2022/08/14 13:55 | Yevhen Pryshchepa v Giorgos Konstantinopoulos | L | 3-2 |
| WTT Contender Zagreb Quals | 2022/06/14 18:55 | Giorgos Konstantinopoulos v Peng Xiang | L | 0-3 |
| WTT Contender Zagreb Quals | 2022/06/14 13:45 | Pavel Sirucek v Giorgos Konstantinopoulos | W | 1-3 |
| TT Elite Series | 2022/03/18 12:30 | Giorgos Konstantinopoulos v Artur Bialek | W | 3-0 |
| TT Elite Series | 2022/03/18 11:00 | Giorgos Konstantinopoulos v Piotr Chodorski | W | 3-0 |
| TT Elite Series | 2022/03/18 09:30 | Giorgos Konstantinopoulos v Maciej Makajew | W | 3-0 |
| WTT Feeder Olomouc Quals | 2022/08/23 18:10 | Esteban Dorr v Guankai Niu | L | 3-1 |
| Oman Open U21 Women | 2019/11/02 07:10 | Linwei Sai v Guankai Niu | L | 3-0 |
| Oman Open U21 Women | 2019/11/01 06:30 | Guankai Niu v Amir Hossein Hodaei | W | 3-0 |
| Oman Open U21 Women | 2019/10/31 15:50 | Guankai Niu v Maciej Kubik | W | 3-1 |
| Czech Republic Extraleague | 2019/02/16 18:35 | Jingkun Liang v Guankai Niu | L | 4-0 |
| Czech Republic Extraleague | 2019/02/16 14:20 | Dang Qiu v Guankai Niu | W | 1-4 |
| Czech Republic Extraleague | 2019/02/15 19:00 | Guankai Niu v Ovidiu Ionescu | W | 4-3 |
| Czech Republic Extraleague | 2019/02/14 16:20 | Guankai Niu v Denis Ivonin | W | 4-1 |