Round: 25 Ground: Hardcourt outdoor
| WTA Seoul Qual | 2016/09/18 04:30 | Katarzyna Piter v Riko Sawayanagi | 6-3,6-7,6-2 |
| WTA Seoul Qual | 2016/09/17 02:30 | Sung-Hee Han v Riko Sawayanagi | 4-6,4-6 |
| WTA Tokyo Qual | 2016/09/10 04:00 | Rebecca Peterson v Riko Sawayanagi | 7-6,6-1 |
| ITF Women Noto | 2016/09/02 01:00 | Momoko Kobori v Riko Sawayanagi | 6-4,6-2 |
| ITF Women Noto | 2016/09/01 03:40 | Chihiro Nunome v Riko Sawayanagi | 4-6,3-6 |
| ITF Women Noto | 2016/08/31 02:05 | Aiko Yoshitomi v Riko Sawayanagi | 2-6,2-6 |
| Wimbledon Women Qual | 2015/06/23 10:00 | Riko Sawayanagi v Richel Hogenkamp | 2-6,2-6 |
| ITF Women Noto | 2016/09/01 01:00 | Kanae Hisami v Mana Ayukawa | 3-6,6-1,6-3 |
| ITF Women Noto | 2016/08/31 03:20 | Mana Ayukawa v Kyoka Okamura | 7-6,6-2 |