Stadium: Court 5 Round: 25 Ground: Hardcourt outdoor
| Luzhou, Simples W-ITF-CHN-09A | 2019/05/28 02:00 | Ayumi Koshiishi v Zhu, Wanning | 6-0,6-1 |
| ITF W25 Goyang | 2019/05/21 01:00 | Liu, Chang v Ayumi Koshiishi | 6-3,4-6,10-8 |
| ITF W25 Goyang | 2019/05/20 01:00 | Yun, Hyeran v Ayumi Koshiishi | 4-6,3-6 |
| ITF W25 Changwon | 2019/05/14 01:00 | Ayumi Koshiishi v Oh, Soo Bin | 6-3,3-6,5-10 |
| ITF W25 Changwon | 2019/05/13 01:00 | Ayumi Koshiishi v Park, SI On | 6-0,6-1 |
| Fukuoka, Singles W-ITF-JPN-10A | 2019/05/06 01:00 | Mai Hontama v Ayumi Koshiishi | 3-6,6-3,10-2 |
| Hong Kong, Simples W-ITF-HKG-01B | 2019/04/08 02:00 | Ayumi Koshiishi v Yadav, Mihika | 6-3,2-6,4-10 |
| Jackson, Singles W-ITF-USA-09A | 2019/04/03 16:40 | Ayumi Koshiishi v Ann Li | 1-6,2-6 |
| Obidos, Singles Qualifying W-ITF-POR-01A | 2019/05/15 08:30 | Khazaniuk, Deniz v Ho, Jessica | 6-3,7-6 |
| Obidos, Singles Qualifying W-ITF-POR-01A | 2019/05/14 08:30 | Ho, Jessica v Mina Hodzic | 6-2,6-3 |
| Obidos, Singles Qualifying W-ITF-POR-01A | 2019/05/13 09:00 | Ho, Jessica v Likhacheva, Sofiia | 6-1,6-1 |
| Obidos, Singles Qualifying W-ITF-POR-01A | 2019/05/10 13:00 | Ho, Jessica v Kilnarova, Monika | 3-6,1-6 |
| Osprey, Fl, Singles Qualifying W-ITF-USA-14A | 2019/04/24 16:10 | Elizabeth Mandlik v Ho, Jessica | 5-7,6-4,6-4 |
| Osprey, Fl, Singles Qualifying W-ITF-USA-14A | 2019/04/23 16:20 | Ho, Jessica v Carrington, Safiya | 6-3,6-3 |
| Dothan, Al, Simples W-ITF-USA-12A | 2019/04/15 18:10 | Ho, Jessica v Panna Udvardy | 1-6,6-2,5-10 |
| ITF W25 Pelham | 2019/04/09 15:00 | Sophie Chang v Ho, Jessica | 6-3,7-6 |