Stadium: Court 6 Round: 25 Ground: Hardcourt outdoor
| ITF W15 Hua Hin | 2019/10/10 03:00 | Patcharin Cheapchandej v Ayumi Koshiishi | 6-1,6-3 |
| ITF W15 Hua Hin | 2019/10/09 03:00 | Ayumi Koshiishi v Mananchaya Sawangkaew | 6-2,6-3 |
| ITF W25 Kyoto | 2019/09/05 05:30 | Ayumi Koshiishi v Michika Ozeki | 0-6,3-6 |
| ITF W25 Kyoto | 2019/09/04 04:25 | Miharu Imanishi v Ayumi Koshiishi | 3-6,4-6 |
| ITF W25 Kyoto | 2019/09/02 04:00 | Ayumi Koshiishi v Utaka Kishigami | 7-5,7-6 |
| ITF W25 Kyoto | 2019/09/02 00:00 | Ayumi Koshiishi v Hx Izabella Tan | 6-0,6-1 |
| ITF W25 Nanao | 2019/08/27 01:00 | Ayumi Koshiishi v Anri Nagata | 4-6,0-6 |
| ITF W25 Tsukuba | 2019/08/19 00:30 | Yui Chikaraishi v Ayumi Koshiishi | 2-6,6-2,10-7 |
| ITF W15 Heraklion | 2019/11/29 08:00 | Oleksandra Oliynykova v Celia Cervino Ruiz | 2-6,6-4,6-3 |
| ITF W15 Heraklion | 2019/11/26 08:00 | Celia Cervino Ruiz v Natalia Siedliska | 5-7,6-1,6-3 |
| ITF W15 Heraklion | 2019/11/20 09:30 | Celia Cervino Ruiz v Ani Amiraghyan | 3-6,6-3,5-7 |
| ITF W15 Heraklion | 2019/11/19 07:30 | Celia Cervino Ruiz v Sophia Intert | 6-2,6-2 |
| ITF W15 Heraklion | 2019/11/18 08:00 | Celia Cervino Ruiz v Lyuboslava Peruhova | 6-3,6-1 |
| ITF W15 Heraklion | 2019/11/17 07:30 | Celia Cervino Ruiz v Jovana Babic | 6-1,5-7,10-6 |
| ITF W15 Lousada | 2019/11/03 11:00 | Celia Cervino Ruiz v Ioana Loredana Rosca | 0-6,7-6,6-3 |
| ITF W15 Lousada | 2019/11/02 12:20 | Margaux Orange v Celia Cervino Ruiz | 7-6,5-7,2-6 |