Round: 25 Ground: Hardcourt outdoor
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2017/06/12 02:30 | Reina Takahashi v So, Kumi | 6-1,6-0 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2017/06/11 04:00 | Reina Takahashi v Furuya, Michiru | 6-1,6-2 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2017/06/11 00:00 | Nagi Hanatani v Reina Takahashi | 6-4,6-7,2-6 |
| ITF Women Tokyo Qual | 2017/06/04 02:15 | Reina Takahashi v Ng, Kwan Yau | 3-6,4-6 |
| ITF Women Karuizawa Qual | 2017/05/21 02:30 | Reina Takahashi v Takayama, Chihiro | 6-7,3-6 |
| ITF Women Karuizawa Qual | 2017/05/20 01:00 | Funa Kozaki v Reina Takahashi | 3-6,4-6 |
| ITF Women Kurume Qual | 2017/05/14 00:30 | Reina Takahashi v Hisamatsu, Shiho | 3-6,7-6,6-7 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2017/03/27 02:30 | Reina Takahashi v Kanai, Ayaka | 6-4,6-3 |
| French Open Women Qual | 2017/05/23 11:05 | Tereza Martincova v Sawayanagi, Riko | 6-4,6-3 |
| ITF Women Kurume | 2017/05/19 02:10 | Erina Hayashi v Sawayanagi, Riko | 6-1,1-6,6-3 |
| ITF Women Kurume | 2017/05/18 02:25 | Olivia Tjandramulia v Sawayanagi, Riko | 6-4,0-6,3-6 |
| ITF Women Kurume | 2017/05/16 03:05 | Miyahara, Mihoki v Sawayanagi, Riko | 3-6,3-6 |
| ITF Women Fukuoka | 2017/05/11 01:00 | Wongteanchai, Varatchaya v Sawayanagi, Riko | 7-5,6-4 |
| ITF Women Fukuoka | 2017/05/10 03:55 | Yukina Saigo v Sawayanagi, Riko | 0-6,6-4,2-6 |
| ITF Women Gifu | 2017/05/03 01:00 | Sawayanagi, Riko v Arina Rodionova | 6-2,3-6,5-7 |
| Zhengzhou, Chine | 2017/04/19 06:20 | Peng, Shuai v Sawayanagi, Riko | 6-1,6-4 |