Stadium: Court 5 Round: 25 Ground: Hardcourt outdoor
| ITF Women Singapore | 2018/06/11 02:00 | Charmaine S Y Seah v Priscilla Heise | 1-6,6-7 |
| ITF Women Singapore | 2018/06/04 02:00 | Charmaine S Y Seah v Victoria Muntean | 2-6,2-6 |
| ITF Women Incheon | 2018/05/15 03:00 | Na Ri Kim v Charmaine S Y Seah | 6-2,6-3 |
| 2018 Fed Cup | 2018/02/10 07:00 | Charmaine S Y Seah v Steffi Carruthers | 6-4,6-4 |
| Billie Jean King Cup | 2018/02/08 07:00 | Anna Clarice Patrimonio v Charmaine S Y Seah | 3-6,7-6,1-6 |
| 2018 Fed Cup | 2018/02/07 07:00 | Charmaine S Y Seah v Saara Kunakunova | 6-2,6-4 |
| 2017 Fed Cup | 2017/07/19 05:00 | Charmaine S Y Seah v Mahin Qureshi | 5-7,6-2,6-3 |
| Billie Jean King Cup | 2016/04/14 03:00 | Theiviya Selvarajoo v Charmaine S Y Seah | 3-6,7-6,6-3 |
| ITF Women Daegu | 2018/06/20 02:45 | Michika Ozeki v Kai-Chen Chang | 2-6,3-6 |
| ITF Women Kofu | 2018/06/14 04:20 | Lisa-Marie Rioux v Michika Ozeki | 7-5,7-5 |
| ITF Women Kofu | 2018/06/12 03:05 | Michika Ozeki v Misa Eguchi | 6-1,3-6,6-3 |
| ITF Women Singapore | 2018/06/05 02:00 | Jovana Jaksic v Michika Ozeki | 6-3,6-1 |
| ITF Women Singapore Qual | 2018/06/03 02:00 | Michika Ozeki v Yee Loon Goh | 6-2,6-1 |
| ITF Women Karuizawa | 2018/05/22 01:00 | Ayumi Miyamoto v Michika Ozeki | 6-1,6-1 |
| ITF Women Kurume Qual | 2018/05/15 01:00 | Sakura Hondo v Michika Ozeki | 0-6,6-3,6-2 |
| ITF Women Kurume Qual | 2018/05/14 01:00 | Chisa Hosonuma v Michika Ozeki | 6-7,2-6 |