Stadium: Court 6 Round: 44
| ITF Women Gyeongsan Qual | 2018/06/11 02:00 | Yeong Won Jeong v Da Hye Kim | 6-1,7-6 |
| ITF Women Sangju Qual | 2018/06/04 01:00 | Yeong Won Jeong v Eri Shimizu | 5-7,4-6 |
| ITF Women Changwon Qual | 2018/05/20 03:00 | Erin Routliffe v Yeong Won Jeong | 6-1,6-2 |
| ITF Women Incheon Qual | 2018/05/14 03:30 | Yeong Won Jeong v Erin Routliffe | 4-6,0-6 |
| ITF Women Incheon Qual | 2018/05/13 03:30 | Yeong Won Jeong v Eunji Lim | 6-3,6-3 |
| ITF Women Goyang | 2018/05/09 05:45 | Yeong Won Jeong v Mayo Hibi | 0-6,3-6 |
| ITF Women Sharm El Sheikh | 2017/11/15 14:00 | Yeong Won Jeong v Shalimar Talbi | 6-3,4-6,3-6 |
| ITF Women Sharm El Sheikh | 2017/11/13 14:00 | Anna Iakovleva v Yeong Won Jeong | 1-6,6-4,2-6 |
| ITF Women Gyeongsan Qual | 2018/06/11 02:00 | Nagisa Morimoto v Mami Hasegawa | 6-4,2-6,2-6 |
| ITF Women Sangju Qual | 2018/06/04 05:00 | Mami Hasegawa v Jin Ju Lee | 4-6,4-6 |
| ITF Women Gifu Qual | 2018/04/29 01:00 | Satsuki Koike v Mami Hasegawa | 6-1,6-0 |
| ITF Women Osaka Qual | 2018/04/08 03:30 | Mami Hasegawa v Nicha Lertpitaksinchai | 6-2,6-7,4-6 |
| ITF Women Osaka Qual | 2018/04/07 04:00 | Nagomi Higashitani v Mami Hasegawa | 7-6,4-6,1-6 |
| ITF Women Kofu Qual | 2018/03/26 01:00 | Mami Hasegawa v Shiho Akita | 2-6,0-6 |
| ITF Women Kofu Qual | 2018/03/25 02:30 | Mami Hasegawa v Kotomi Takahata | 6-2,7-6 |
| ITF Women Kofu Qual | 2018/03/24 04:00 | Ling Zhang v Mami Hasegawa | 6-4,4-6,6-7 |