Stadium: Court 3 Round: 44
| ITF Women Daegu Qual | 2018/06/17 02:00 | Jang, Eun SE v Hasegawa, Mami | 2-6,3-6 |
| ITF Women Gyeongsan Qual | 2018/06/12 01:00 | Jeong, Yeong Won v Hasegawa, Mami | 6-4,7-6 |
| ITF Women Gyeongsan Qual | 2018/06/11 02:00 | Morimoto, Nagisa v Hasegawa, Mami | 6-4,2-6,2-6 |
| ITF Women Sangju Qual | 2018/06/04 05:00 | Hasegawa, Mami v Lee, Jin Ju | 4-6,4-6 |
| ITF Women Gifu Qual | 2018/04/29 01:00 | Koike, Satsuki v Hasegawa, Mami | 6-1,6-0 |
| ITF Women Osaka Qual | 2018/04/08 03:30 | Hasegawa, Mami v Lertpitaksinchai, Nicha | 6-2,6-7,4-6 |
| ITF Women Osaka Qual | 2018/04/07 04:00 | Nagomi Higashitani v Hasegawa, Mami | 7-6,4-6,1-6 |
| Kofu, Singles Qualifying W-WITF-JPN-02A | 2018/03/26 01:00 | Hasegawa, Mami v Shiho Akita | 2-6,0-6 |
| ITF Women Gyeongsan | 2018/06/14 05:50 | Kim, SE-Hyun v Yea, Hyojung | 4-6,0-6 |
| ITF Women Gyeongsan | 2018/06/12 02:30 | Kim, SE-Hyun v Ng, Kwan Yau | 6-1,6-3 |
| ITF Women Sangju | 2018/06/06 05:15 | Subin Park v Kim, SE-Hyun | 1-6,6-3,6-2 |
| Changwon, Singles Qualifying W-WITF-KOR-01A | 2018/05/21 01:00 | Yea, Hyojung v Kim, SE-Hyun | 6-1,1-6,6-0 |
| ITF Women Incheon Qual | 2018/05/14 03:30 | Maddison Inglis v Kim, SE-Hyun | 6-3,5-7,6-2 |
| ITF Women Incheon Qual | 2018/05/13 03:30 | Kim, SE-Hyun v Lee, Seunghyun | 6-2,6-0 |
| ITF Women Goyang | 2018/05/08 05:05 | En Shuo Liang v Kim, SE-Hyun | 3-6,7-5,6-0 |
| Sharm El Sheikh, Singles W-WITF-EGY-09A | 2017/11/16 16:05 | Kim, SE-Hyun v Burrage, Jodie Anna | 1-6,4-6 |