Stadium: Court 8 Round: 54 Ground: Hardcourt outdoor
| ITF Women Goyang | 2018/05/09 04:55 | Ayumi Koshiishi v So-Ra Lee | 6-7,3-6 |
| ITF W25 Luzhou | 2019/05/28 06:15 | Ayumi Koshiishi v Jessica Ho | 3-6,1-6 |
| ITF W25 Luzhou | 2019/05/28 02:00 | Ayumi Koshiishi v WanNing Zhu | 6-0,6-1 |
| ITF W25 Goyang | 2019/05/21 01:00 | Chang Liu v Ayumi Koshiishi | 6-3,4-6,10-8 |
| ITF W25 Goyang | 2019/05/20 01:00 | Hyeran Yun v Ayumi Koshiishi | 4-6,3-6 |
| ITF W25 Changwon | 2019/05/14 01:00 | Ayumi Koshiishi v Dabin Oh | 6-3,3-6,5-10 |
| ITF W25 Changwon | 2019/05/13 01:00 | Ayumi Koshiishi v Si On Park | 6-0,6-1 |
| ITF W60 Fukuoka | 2019/05/06 01:00 | Mai Hontama v Ayumi Koshiishi | 3-6,6-3,10-2 |
| ITF W25 Hong Kong | 2019/04/08 02:00 | Ayumi Koshiishi v Mihika Yadav | 6-3,2-6,4-10 |
| ITF W25 Daegu | 2019/06/03 01:00 | Ryeong Gyeong Park v So-Ra Lee | 3-6,4-6 |
| ITF W25 Incheon | 2019/05/28 04:00 | So-Ra Lee v Yuxuan Zhang | 2-6,4-6 |
| ITF W25 Goyang | 2019/05/23 03:40 | Yuxuan Zhang v So-Ra Lee | 6-3,6-4 |
| ITF W25 Goyang | 2019/05/22 01:00 | Viktoriia Dema v So-Ra Lee | 6-3,2-6,6-7 |
| ITF W25 Goyang | 2019/05/21 01:00 | So-Ra Lee v Seohyeon Kim | 6-0,6-3 |
| ITF W25 Goyang | 2019/05/20 03:00 | So-Ra Lee v Hwiwon Wi | 6-1,6-4 |
| ITF W25 Changwon | 2019/05/16 01:00 | Ya-Hsuan Lee v So-Ra Lee | 6-2,6-2 |
| ITF W25 Changwon | 2019/05/14 03:40 | So-Ra Lee v Hyejin Lee | 6-4,4-6,7-5 |