Stadium: Court 6 Round: 25 Ground: Hardcourt outdoor
| ITF - W15 Manacor | 2020/01/23 12:00 | Ayumi Koshiishi v Kathleen Kanev | 6-4,6-1 |
| ITF - W15 Manacor | 2020/01/22 16:30 | Ayumi Koshiishi v Haine Ogata | 6-1,6-3 |
| ITF - W15 Manacor | 2020/01/22 14:00 | Ayumi Koshiishi v Roa, Jillian Louise | 6-2,6-1 |
| Hua Hin, Simples W-ITF-THA-10A | 2019/10/10 03:00 | Patcharin Cheapchandej v Ayumi Koshiishi | 6-1,6-3 |
| Hua Hin, Simples W-ITF-THA-10A | 2019/10/09 03:00 | Ayumi Koshiishi v Mananchaya Sawangkaew | 6-2,6-3 |
| Kyoto, Qualifications Simples W-ITF-JPN-15A | 2019/09/05 05:30 | Ayumi Koshiishi v Michika Ozeki | 0-6,3-6 |
| Kyoto, Qualifications Simples W-ITF-JPN-15A | 2019/09/04 04:25 | Imanishi, Miharu v Ayumi Koshiishi | 3-6,4-6 |
| Kyoto, Qualifications Simples W-ITF-JPN-15A | 2019/09/02 04:00 | Ayumi Koshiishi v Kishigami, Utaka | 7-5,7-6 |
| ITF - W15 Manacor | 2020/01/23 12:00 | Marie Villet v Celia Cervino Ruiz | 2-6,2-6 |
| ITF - W15 Manacor | 2020/01/22 16:30 | Gancev, Tara v Celia Cervino Ruiz | 0-6,0-6 |
| ITF - W15 Manacor | 2020/01/22 14:00 | Gomez, Maria v Celia Cervino Ruiz | 0-6,0-6 |
| ITF - W15 Héraklion | 2019/11/29 08:00 | Oleksandra Oliynykova v Celia Cervino Ruiz | 2-6,6-4,6-3 |
| ITF - W15 Héraklion | 2019/11/26 08:00 | Celia Cervino Ruiz v Natalia Siedliska | 5-7,6-1,6-3 |
| ITF - W15 Héraklion | 2019/11/20 09:30 | Celia Cervino Ruiz v Amiraghyan, Ani | 3-6,6-3,5-7 |
| ITF - W15 Héraklion | 2019/11/19 07:30 | Celia Cervino Ruiz v Intert, Sophia | 6-2,6-2 |
| ITF - W15 Héraklion | 2019/11/18 08:00 | Celia Cervino Ruiz v Peruhova, Lyuboslava | 6-3,6-1 |