Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| ITF Women Tokyo | 2017/11/08 03:20 | Hibi, Mayo v Ozaki, Risa | 6-1,6-1 |
| Osaka, Singles W-ITF-JPN-02A | 2019/02/26 02:40 | Ozaki, Risa v Imanishi, Miharu | 6-3,1-6,7-10 |
| Osaka, Singles W-ITF-JPN-02A | 2019/02/25 02:30 | Ozaki, Risa v Olivia Tjandramulia | 4-6,7-6,10-5 |
| ITF W60 Kyoto | 2019/02/19 04:35 | Ylena In-Albon v Ozaki, Risa | 6-1,6-4 |
| Singapour, Simples W-ITF-SGP-04A | 2019/01/21 02:00 | Ozaki, Risa v Aldila Sutjiadi | 2-6,6-4,4-10 |
| Singapour, Simples W-ITF-SGP-04A | 2019/01/15 02:00 | Cagla Buyukakcay v Ozaki, Risa | 7-6,6-0 |
| Hong Kong, Simples W-ITF-HKG-01B | 2019/01/11 02:00 | Ma, Shuyue v Ozaki, Risa | 7-6,7-5 |
| Hong Kong, Simples W-ITF-HKG-01B | 2019/01/10 02:00 | Ozaki, Risa v AL Nabhani, Fatma | 3-6,6-3,6-4 |
| Hong Kong, Simples W-ITF-HKG-01B | 2019/01/09 02:30 | Olivia Tjandramulia v Ozaki, Risa | 4-6,2-6 |
| WTA - Indian Wells | 2019/02/25 18:00 | Hibi, Mayo v Ena Shibahara | 6-2,3-6,4-6 |
| Rancho Santa Fe, Ca, Singles W-ITF-USA-05A | 2019/02/20 18:00 | Sachia Vickery v Hibi, Mayo | 6-3,6-4 |
| Surprise, Singles W-ITF-USA-04A | 2019/02/15 17:30 | Lee, Hua-Chen v Hibi, Mayo | 6-1,6-1 |
| Surprise, Singles W-ITF-USA-04A | 2019/02/13 20:35 | Carolina Alves v Hibi, Mayo | 4-6,2-6 |
| Midland, Simples W-ITF-USA-03A | 2019/01/29 19:00 | Hibi, Mayo v Marie Bouzkova | 7-5,2-6,3-6 |
| Newport Beach, USA | 2019/01/23 18:00 | Hibi, Mayo v Claire Liu | 2-6,1-6 |
| Newport Beach, USA | 2019/01/21 21:55 | Anna Danilina v Hibi, Mayo | 4-6,4-6 |
| Taipei, Taipei Chinois | 2018/11/11 03:45 | Elena-Gabriela Ruse v Hibi, Mayo | 7-6,2-6,6-4 |