Round: 44 Ground: Hardcourt outdoor
| ITF Women Nanjing Qual | 2018/03/31 01:30 | Cai, Xinyu v Ma, Shuyue | 5-7,3-6 |
| ITF Women Nanjing Qual | 2018/03/24 01:30 | You, Mi Zhuoma v Cai, Xinyu | 2-6,6-1,6-2 |
| ITF Women Nanjing | 2018/03/18 07:30 | Cai, Xinyu v Oleksandra Oliynykova | 3-6,6-4,4-6 |
| ITF Women Nanjing | 2018/03/17 02:30 | Cai, Xinyu v Xin, Chunxi | 6-3,6-4 |
| ITF Women Xiamen | 2018/02/25 04:30 | Cao, Siqi v Cai, Xinyu | 4-6,6-3,6-3 |
| Antalya, Qualifications Simples W-WITF-TUR-46A | 2017/12/17 07:45 | Cai, Xinyu v Mishina, Daria | 2-6,5-7 |
| Antalya, Qualifications Simples W-WITF-TUR-46A | 2017/12/11 07:15 | Cai, Xinyu v Pysson, Justine | 5-7,3-6 |
| Antalya, Qualifications Simples W-WITF-TUR-46A | 2017/12/10 07:15 | Zhibek Kulambayeva v Cai, Xinyu | 1-6,5-7 |