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