Stadium: Court 1 Round: 44 Ground: Hardcourt outdoor
| ITF China F11 Qual | 2018/07/14 02:50 | Kai, Wai Yu v He, Xiaoyu | 6-2,6-2 |
| ITF China F10 Qual | 2018/07/07 02:00 | Zou, Weibowen v Kai, Wai Yu | 6-3,7-6 |
| ITF China F9 Qual | 2018/07/01 04:00 | Bingyu Yu v Kai, Wai Yu | 6-2,6-1 |
| ITF Hong Kong F1 | 2018/06/26 02:00 | Hong Kit Wong v Kai, Wai Yu | 6-4,6-4 |
| ITF Hong Kong F1 Qual | 2018/06/24 03:25 | Alex Hunt v Kai, Wai Yu | 2-6,1-6 |
| ITF Hong Kong F1 Qual | 2018/06/23 02:00 | Kai, Wai Yu v Sam Ryan Ziegann | 6-3,6-3 |
| ITF China F5 Qual | 2018/05/07 04:20 | Wang, Chukang v Kai, Wai Yu | 6-4,6-3 |
| ITF China F5 Qual | 2018/05/05 08:55 | Kai, Wai Yu v Su, Chuanqi | 6-1,6-0 |