| ITF Women Nanjing Qual | 2018/03/25 05:10 | Cao, Siqi v Wei Zheng | 6-2,6-0 |
| ITF Women Nanjing Qual | 2018/03/24 05:30 | Cao, Siqi v Shuoran Wang | 6-3,6-1 |
| ITF Women Nanjing | 2018/03/20 05:20 | Cao, Siqi v Fang Ying Xun | 1-6,1-6 |
| ITF Women Xiamen | 2018/02/26 02:00 | Cao, Siqi v Sheng, Yuqi | 5-7,2-6 |
| ITF Women Xiamen | 2018/02/25 04:30 | Cao, Siqi v Cai, Xinyu | 4-6,6-3,6-3 |
| Shenzhen, Simples W-WITF-CHN-02A | 2017/11/07 04:00 | Lin Zhu v Cao, Siqi | 6-2,6-0 |
| ITF Women Liuzhou | 2017/10/24 03:50 | Dalila Jakupovic v Cao, Siqi | 6-3,6-0 |
| ITF Women Hua Hin Qual | 2017/09/24 14:05 | Ka, Andrea v Cao, Siqi | 7-6,6-1 |
| ITF Women Nanjing Qual | 2018/03/25 04:30 | Emma Raducanu v Oleksandra Oliynykova | 7-6,6-1 |
| ITF Women Nanjing Qual | 2018/03/24 05:30 | Koike, Satsuki v Emma Raducanu | 0-6,0-6 |