Stadium: Court 2 Round: 28
| ITF Women Gyeongsan | 2018/06/15 01:00 | Hanna Chang v Yea, Hyojung | 6-2,6-2 |
| ITF Women Gyeongsan | 2018/06/12 06:50 | Hanna Chang v Mdlulwa, Warona | 6-1,6-1 |
| ITF Women Sangju | 2018/06/05 06:20 | Hanna Chang v Liu, Chang | 7-6,6-7,2-6 |
| ITF Women Changwon | 2018/05/24 01:00 | Victoria Rodriguez v Hanna Chang | 4-6,6-4,6-0 |
| ITF Women Changwon | 2018/05/22 01:00 | Akiko Omae v Hanna Chang | 1-6,5-7 |
| ITF Women Incheon | 2018/05/16 04:25 | Hanna Chang v Dabin Kim | 1-6,2-6 |
| ITF Women Goyang | 2018/05/08 03:50 | Ya-Hsuan Lee v Hanna Chang | 6-1,6-1 |
| Irapuato, Singles W-WITF-MEX-01A | 2018/03/16 00:45 | Renata Zarazua v Hanna Chang | 6-3,6-0 |
| ITF Women Gyeongsan | 2018/06/15 02:40 | Koike, Satsuki v Zhibek Kulambayeva | 5-7,6-3,7-6 |
| ITF Women Gyeongsan | 2018/06/14 04:50 | Eunhye Lee v Koike, Satsuki | 4-6,2-6 |
| ITF Women Gyeongsan | 2018/06/13 03:40 | Bizhukova, Fatima v Koike, Satsuki | 2-6,6-2,1-6 |
| ITF Women Gyeongsan Qual | 2018/06/12 04:50 | Yoon, Sujin v Koike, Satsuki | 4-6,2-6 |
| ITF Women Gyeongsan Qual | 2018/06/11 02:00 | Koike, Satsuki v Miyahara, Mihoki | 6-2,6-2 |
| ITF Women Gyeongsan Qual | 2018/06/10 03:30 | Koike, Satsuki v Lee, Jeongyun | 7-6,6-1 |
| ITF Women Sangju Qual | 2018/06/03 02:00 | Eri Shimizu v Koike, Satsuki | 2-6,7-5,6-3 |
| ITF Women Fukuoka Qual | 2018/05/06 01:00 | Nagi Hanatani v Koike, Satsuki | 6-1,6-4 |