Round: 54 Ground: Hardcourt outdoor
| ITF Women Nonthaburi Qual | 2018/07/14 05:35 | Patcharin Cheapchandej v Jia Qi Ren | 6-2,6-1 |
| ITF Women Tianjin Qual | 2018/07/08 02:00 | Xinyu Cai v Jia Qi Ren | 6-3,7-5 |
| ITF Women Madrid Qual | 2018/06/18 10:15 | Anastasia Pribylova v Jia Qi Ren | 6-0,6-1 |
| ITF Women Hua Hin Qual | 2018/06/04 05:05 | Ange Oby Kajuru v Jia Qi Ren | 6-1,6-2 |
| ITF Women Hua Hin Qual | 2018/06/03 03:00 | Dolavee Tumthong v Jia Qi Ren | 1-6,2-6 |
| WTA Anning Qual | 2018/04/28 05:55 | Jia Qi Ren v Nika Kukharchuk | 0-6,4-6 |
| ITF Women Quanzhou | 2018/04/24 02:00 | Jacqueline Cako v Jia Qi Ren | 6-1,6-1 |
| ITF Women Nanjing Qual | 2018/04/01 05:25 | Jia Qi Ren v Lingwei Kong | 6-1,2-6,3-6 |
| ITF Women Taipei | 2018/07/26 02:00 | Ayumi Koshiishi v Hua-Chen Lee | 3-6,0-6 |
| ITF Women Taipei | 2018/07/24 03:45 | Ting-Pei Chang v Ayumi Koshiishi | 2-6,1-6 |
| ITF Women Hong Kong | 2018/07/13 03:00 | Sakura Hosogi v Ayumi Koshiishi | 3-6,6-4,6-3 |
| ITF Women Hong Kong | 2018/07/12 02:00 | Ayumi Koshiishi v Zeel Desai | 7-5,6-1 |
| ITF Women Hong Kong | 2018/07/11 02:00 | Ayumi Koshiishi v Prerna Bhambri | 6-2,6-2 |
| ITF Women Hong Kong | 2018/07/10 03:50 | Ayumi Koshiishi v Haine Ogata | 6-1,6-4 |
| ITF Women Singapore Qual | 2018/06/10 02:00 | Deria Nur Haliza v Ayumi Koshiishi | 1-6,6-4,6-3 |
| ITF Women Singapore | 2018/06/04 02:00 | Ayumi Koshiishi v Hiroko Kuwata | 6-7,7-6,4-6 |