Stadium: Court 2 Round: 25
| ITF Women Osaka Qual | 2018/04/08 03:30 | Misa Eguchi v Ji-Hee Choi | 4-6,6-0,7-6 |
| ITF Women Osaka Qual | 2018/04/07 02:30 | Kisa Yoshioka v Ji-Hee Choi | 6-4,2-6,4-6 |
| ITF Women Kashiwa Qual | 2018/04/01 04:30 | Ksenia Lykina v Ji-Hee Choi | 6-3,3-6,6-2 |
| ITF Women Nishi-Tama | 2018/03/20 03:00 | Na Ri Kim v Ji-Hee Choi | 4-6,6-3,6-1 |
| ITF Women Toyota Qual | 2018/03/11 01:00 | Ji-Hee Choi v Sunam Jeong | 2-6,2-6 |
| ITF Women Toyota Qual | 2018/03/10 01:00 | Ji-Hee Choi v Ayumi Koshiishi | 4-6,6-3,6-2 |
| ITF Women Toyota Qual | 2017/11/12 03:35 | Ji-Hee Choi v Rika Fujiwara | 0-6,6-7 |
| ITF Women Tokyo Qual | 2017/11/05 03:10 | Ji-Hee Choi v Chisa Hosonuma | 6-4,1-6,4-6 |
| ITF Women Kashiwa Qual | 2018/04/01 03:30 | Kai-Chen Chang v Makoto Ninomiya | 6-1,6-7,7-6 |
| ITF Women Kofu | 2018/03/27 04:20 | Giulia Gatto Monticone v Kai-Chen Chang | 6-2,6-3 |
| ITF Women Toyota | 2018/03/14 05:40 | Kai-Chen Chang v Ayla Aksu | 3-6,2-6 |
| ITF Women Yokohama | 2018/03/07 05:30 | Eri Hozumi v Kai-Chen Chang | 7-6,5-7,6-4 |
| WTA Taipei | 2018/01/31 07:55 | Yulia Putintseva v Kai-Chen Chang | 6-3,7-6 |
| WTA Taipei | 2018/01/29 07:30 | Ya-Hsuan Lee v Kai-Chen Chang | 5-7,2-6 |
| Australian Open Women WC | 2017/12/01 02:00 | Misaki Doi v Kai-Chen Chang | 6-3,6-2 |
| Australian Open Women WC | 2017/11/29 02:00 | Kai-Chen Chang v Akiko Omae | 6-3,6-3 |