Stadium: Court 5 Round: 25 Ground: Hardcourt outdoor
| 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 Jackson | 2019/04/03 16:40 | Ayumi Koshiishi v Ann Li | 1-6,2-6 |
| ITF W25 Obidos | 2019/05/15 08:30 | Deniz Khazaniuk v Jessica Ho | 6-3,7-6 |
| ITF W25 Obidos | 2019/05/14 08:30 | Jessica Ho v Mina Hodzic | 6-2,6-3 |
| ITF W25 Obidos | 2019/05/13 09:00 | Jessica Ho v Sofiia Likhacheva | 6-1,6-1 |
| ITF W25 Obidos | 2019/05/10 13:00 | Jessica Ho v Monika Kilnarova | 3-6,1-6 |
| ITF W25 Osprey | 2019/04/24 16:10 | Elizabeth Mandlik v Jessica Ho | 5-7,6-4,6-4 |
| ITF W25 Osprey | 2019/04/23 16:20 | Jessica Ho v Safiya Carrington | 6-3,6-3 |
| ITF W80 Dothan | 2019/04/15 18:10 | Jessica Ho v Panna Udvardy | 1-6,6-2,5-10 |
| ITF - W25 Pelham | 2019/04/09 15:00 | Sophie Chang v Jessica Ho | 6-3,7-6 |