Round: 54 Ground: Hardcourt outdoor
| ITF Femminile Gimcheon | 2018/08/16 01:00 | Ah Song v Yu Jin Ahn | 4-6,1-6 |
| ITF femminile Daegu - Qual. | 2018/06/18 03:30 | Sung-Hee Han v Ah Song | 7-5,6-4 |
| ITF femminile Daegu - Qual. | 2018/06/17 02:00 | Eunseo Kim v Ah Song | 1-6,3-6 |
| ITF femminile Gyeongsan - Qual. | 2018/06/12 04:00 | Ah Song v Haine Ogata | 5-7,4-6 |
| ITF femminile Gyeongsan - Qual. | 2018/06/11 02:00 | Chihiro Takayama v Ah Song | 2-6,4-6 |
| ITF femminile Gyeongsan - Qual. | 2018/06/10 02:00 | Ah Song v Nagomi Higashitani | 7-5,4-6,7-5 |
| ITF Femminile Sangju | 2018/06/06 01:00 | Ah Song v Ju-Eun Kim | 4-6,2-6 |
| ITF Femminile Incheon - Qual. | 2018/05/14 02:00 | Varvara Flink v Ah Song | 6-1,6-0 |
| ITF W25 Daegu | 2019/06/03 01:00 | Pei-Chi Lee v Dayeon Back | 3-6,7-6,13-11 |
| ITF W25 Goyang | 2019/05/23 03:30 | Jennifer Elie v Dayeon Back | 7-6,6-4 |
| ITF W25 Goyang | 2019/05/21 03:25 | Freya Christie v Dayeon Back | 5-7,2-6 |
| ITF W25 Goyang | 2019/05/20 07:05 | Dayeon Back v Yu Jin Ahn | 6-4,6-0 |
| ITF W25 Changwon | 2019/05/14 01:00 | Yeong Won Jeong v Dayeon Back | 6-4,6-1 |
| ITF W25 Changwon | 2019/05/13 04:10 | Han Gyeol Jeong v Dayeon Back | 0-6,0-6 |
| ITF femminile Yeongwol | 2018/09/07 01:00 | Dayeon Back v So-Ra Lee | 3-6,3-6 |
| ITF femminile Yeongwol | 2018/09/04 03:00 | Angelina Gabueva v Dayeon Back | 2-6,6-7 |