Stadium: Court 13 Round: 62 Ground: Synthetic outdoor
| ITF W25 Santo Domingo | 2021/06/09 13:00 | Erina Hayashi v Maria Lourdes Carle | 3-6,2-6 |
| ITF W25 Santo Domingo | 2021/06/03 12:50 | Erina Hayashi v Maria Lourdes Carle | 1-6,2-6 |
| ITF W25 Pelham | 2021/05/17 18:55 | Erina Hayashi v Mirjam Bjorklund | 1-6,7-6,1-6 |
| ITF W100 Bonita Springs | 2021/05/10 21:00 | Erina Hayashi v Seone Mendez | 2-6,6-7 |
| ITF W60 Charlottesville | 2021/04/26 18:10 | Erina Hayashi v Amina Anshba | 4-6,6-3,4-10 |
| ITF W25 Yokohama | 2020/03/03 06:10 | Erina Hayashi v Dasha Ivanova | 2-6,6-4,6-7 |
| ITF W60 Kyoto | 2020/02/22 00:45 | Fang Ying Xun v Erina Hayashi | 6-1,6-2 |
| ITF W60 Kyoto | 2020/02/21 01:00 | Erina Hayashi v Risa Ushijima | 6-0,6-2 |