Stadium: Court C Round: 45 Ground: Hardcourt indoor
| 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 W25 Nonthaburi | 2019/07/30 02:30 | Yidi Yang v Ayumi Koshiishi | 6-0,6-2 |
| ITF W25 Nonthaburi | 2019/07/29 06:20 | Thasaporn Naklo v Ayumi Koshiishi | 3-6,4-6 |
| ITF W25 Nonthaburi | 2019/07/23 04:20 | Ayumi Koshiishi v Michika Ozeki | 2-6,4-6 |
| ITF W25 Nonthaburi | 2019/07/22 08:00 | Ho Ching Wu v Ayumi Koshiishi | 3-6,2-6 |
| ITF W15 Gimcheon | 2019/06/20 01:00 | Ayumi Koshiishi v Sunam Jeong | 2-6,6-7 |
| ITF W15 Gimcheon | 2019/06/19 01:00 | Ayumi Koshiishi v Honoka Kobayashi | 4-6,6-4,6-4 |
| ITF W25 Taipei | 2019/07/29 02:00 | Lisa-Marie Rioux v Hx Izabella Tan | 6-0,6-0 |
| ITF W25 Daegu | 2019/06/03 01:00 | Hx Izabella Tan v Na Ri Kim | 1-6,0-6 |
| ITF W25 Singapore | 2019/05/22 06:35 | Hx Izabella Tan v Rina Saigo | 4-6,1-6 |
| ITF W25 Singapore | 2019/05/14 03:40 | Hx Izabella Tan v Nikita Uberoi | 3-6,1-6 |
| ITF W15 Sharm El Sheikh | 2019/04/10 08:00 | Anastasia Zolotareva v Hx Izabella Tan | 6-1,6-0 |
| ITF W15 Sharm El Sheikh | 2019/04/03 08:00 | Anastasiia Poplavska v Hx Izabella Tan | 6-1,6-0 |
| ITF W15 Sharm El Sheikh | 2019/03/06 13:05 | Anastasia Vdovenco v Hx Izabella Tan | 6-0,6-0 |
| ITF W15 Sharm El Sheikh | 2019/02/27 11:00 | Jelena Simic v Hx Izabella Tan | 6-0,6-2 |