Round: 26 Ground: Hardcourt outdoor
| ITF Women Perth Qual | 2017/02/19 04:30 | Erina Hayashi v Lou Brouleau | 2-6,4-6 |
| ITF Women Perth Qual | 2017/02/12 05:00 | Erina Hayashi v Ayano Shimizu | 5-7,2-6 |
| ITF Women Toyota Qual | 2016/11/13 00:30 | Erina Hayashi v Hayaka Murase | 6-4,6-2 |
| Challenger Kaohsiung | 2016/06/26 02:00 | Erina Hayashi v Ying Zhang | 0-6,6-7 |
| Challenger Kaohsiung | 2016/06/25 02:00 | Erina Hayashi v Mizuno Kijima | 6-1,6-0 |
| Challenger Kaohsiung | 2016/06/24 02:00 | Erina Hayashi v Hua-Chen Lee | 1-6,6-1,7-6 |
| Challenger Kaohsiung | 2016/06/23 02:00 | Ya-Hsuan Lee v Erina Hayashi | 2-6,6-1,2-6 |
| Challenger Kaohsiung | 2016/06/22 02:00 | Erina Hayashi v Katherine Ip | 6-3,6-4 |
| ITF Women Perth | 2017/02/21 02:00 | Georgia Brescia v Riko Sawayanagi | 2-6,6-2,6-2 |
| ITF Women Perth | 2017/02/15 02:00 | Riko Sawayanagi v Katie Boulter | 1-6,4-6 |
| ITF Women Launceston | 2017/02/08 01:15 | Marie Bouzkova v Riko Sawayanagi | 6-2,6-0 |
| ITF Women Burnie | 2017/01/30 23:00 | Riko Sawayanagi v Jamie Loeb | 0-6,1-6 |
| Australian Open 2017 Women Qual | 2017/01/12 01:20 | Aliaksandra Sasnovich v Riko Sawayanagi | 2-6,6-2,6-2 |
| ITF Women Hong Kong | 2017/01/03 03:45 | Riko Sawayanagi v Olga Doroshina | 2-6,1-6 |
| ITF Women Dubai Qual | 2016/12/11 06:30 | Riko Sawayanagi v Valeria Savinykh | 5-7,1-6 |
| ITF Women Dubai Qual | 2016/12/10 06:30 | Riko Sawayanagi v Gabriela Pantuckova | 6-4,6-1 |