Stadium: A 5 Round: 26 Ground: Synthetic outdoor
| ITF W25 - Nanao | 2019/08/27 04:55 | Erina Hayashi v Hiromi Abe | 6-4,3-6,6-0 |
| ITF W25 Tsukuba | 2019/08/22 02:20 | Momoko Kobori v Erina Hayashi | 7-6,7-5 |
| ITF W25 Tsukuba | 2019/08/20 04:55 | Yuuki Tanaka v Erina Hayashi | 6-1,3-6,2-6 |
| ITF W25 Taipei | 2019/07/31 02:00 | Erina Hayashi v Haruka Kaji | 4-6,2-6 |
| ITF W25 - Aschaffenburg | 2019/07/18 11:00 | Erina Hayashi v Ekaterina Makarova | 1-6,2-6 |
| ITF W25 - Aschaffenburg | 2019/07/17 14:25 | Quirine Lemoine v Erina Hayashi | 2-6,4-6 |
| ITF W25 Biella | 2019/07/02 10:30 | Erina Hayashi v Laura Pigossi | 6-7,3-6 |
| ITF W25 Biella | 2019/07/01 08:00 | Erina Hayashi v Marie Mettraux | 6-4,6-4 |
| ITF W25 - Nanao | 2019/08/27 02:55 | Yexin Ma v Yuki Naito | 6-7,3-6 |
| ITF W25 - Nonthaburi | 2019/08/04 03:00 | Xinyu Wang v Yuki Naito | 6-2,6-7,3-6 |
| ITF W25 - Nonthaburi | 2019/08/03 03:00 | Yuki Naito v Mananchaya Sawangkaew | 6-3,6-4 |
| ITF W25 - Nonthaburi | 2019/08/02 04:55 | Yuki Naito v Gozal Ainitdinova | 6-3,7-5 |
| ITF W25 - Nonthaburi | 2019/08/01 06:05 | Yuki Naito v Patcharin Cheapchandej | 2-6,6-4,6-4 |
| ITF W25 - Nonthaburi | 2019/07/30 06:10 | Yuki Naito v Ho Ching Wu | 6-0,6-3 |
| ITF W25 - Nonthaburi | 2019/07/27 04:30 | Yuki Naito v Su Jeong Jang | 4-6,6-2,4-6 |
| ITF W25 - Nonthaburi | 2019/07/26 04:55 | Jia-Qi Kang v Yuki Naito | 6-3,2-6,3-6 |