| WTT - Feeder Panagyurishte | 2022/09/02 13:05 | Kay Stumper v Aidos Kenzhigulov | W | 3-2 |
| WTT - Feeder Olomouc | 2022/08/26 16:55 | Maharu Yoshimura v Kay Stumper | L | 3-2 |
| WTT - Feeder Olomouc | 2022/08/26 12:20 | Yaroslav Zhmudenko v Kay Stumper | W | 1-4 |
| WTT - Feeder Olomouc | 2022/08/25 17:55 | Jan Valenta v Kay Stumper | W | 1-4 |
| WTT Contender - Tunis - Kwal. | 2022/08/02 10:00 | Jules Rolland v Kay Stumper | L | 3-2 |
| WTT - Contender - Tunis | 2022/08/01 14:00 | Manav Vikash Thakkar v Kay Stumper | W | 1-3 |
| WTT - Feeder - Boedapest | 2022/07/20 11:10 | Tomislav Pucar v Kay Stumper | W | 1-4 |
| WTT - Feeder - Boedapest | 2022/07/19 16:30 | Aleksandar Karakasevic v Kay Stumper | W | 0-4 |
| WTT - Feeder Panagyurishte | 2022/09/02 11:35 | Haidong Xu v Kai Zhou | W | 1-4 |
| WTT - Feeder Panagyurishte - Kwal. | 2022/09/01 13:40 | Kwangil Baek v Kai Zhou | W | 0-3 |
| WTT - Feeder Panagyurishte - Kwal. | 2022/08/31 12:00 | Kai Zhou v Elmurod Kholikov | W | 3-0 |
| WTT - Feeder Panagyurishte - Kwal. | 2022/08/30 11:00 | Kai Zhou v Jesus Cantero | W | 3-0 |
| WTT Feeder Olomouc Quals | 2022/08/24 17:15 | Kai Zhou v Chan-Hyeok Park | L | 1-3 |
| WTT Feeder Olomouc Quals | 2022/08/24 11:30 | Kai Zhou v Lilian Bardet | W | 3-2 |
| WTT Feeder Olomouc Quals | 2022/08/23 15:50 | Rafael Turrini v Kai Zhou | W | 0-3 |
| North American Open | 2019/12/08 20:55 | Can Akkuzu v Kai Zhou | L | 4-2 |