Stadium: Court 1 Round: 54 Ground: Hardcourt outdoor
| ITF Women Yeongwol | 2018/09/06 03:00 | Seung-Yeon Hong v Sunam Jeong | 4-6,3-6 |
| ITF W25 Changwon | 2019/05/15 02:20 | Sunam Jeong v Eunhye Lee | 2-6,3-6 |
| 2019 Fed Cup | 2019/02/09 06:55 | Ankita Raina v Sunam Jeong | 6-3,6-3 |
| WTA Seoul | 2018/09/15 03:15 | Sunam Jeong v Varvara Flink | 2-6,6-3,0-6 |
| ITF Women Yeongwol | 2018/09/09 01:00 | Sunam Jeong v So-Ra Lee | 6-2,6-1 |
| ITF Women Yeongwol | 2018/09/08 03:00 | Yu Jin Ahn v Sunam Jeong | 2-6,5-7 |
| ITF Women Yeongwol | 2018/09/07 01:00 | Hanna Chang v Sunam Jeong | 2-6,3-6 |
| ITF Women Yeongwol | 2018/09/06 03:00 | Seung-Yeon Hong v Sunam Jeong | 4-6,3-6 |
| ITF Women Yeongwol | 2018/09/05 04:45 | Dainhee Kim v Sunam Jeong | 1-6,1-6 |
| ITF Women Yeongwol | 2018/09/06 03:00 | Seung-Yeon Hong v Sunam Jeong | 4-6,3-6 |
| ITF Women Yeongwol | 2018/09/05 03:10 | Se Jin Lee v Seung-Yeon Hong | 3-6,3-6 |
| ITF Women Gimcheon | 2018/08/17 01:00 | Seung-Yeon Hong v Joanna Garland | 5-7,1-6 |
| ITF Women Gimcheon | 2018/08/16 01:00 | Seung-Yeon Hong v Yeong Won Jeong | 7-5,6-4 |
| ITF Women Gimcheon | 2018/08/15 03:00 | Seung-Yeon Hong v Ai Kamiyoshihara | 6-3,6-0 |
| ITF Women Tianjin Qual | 2018/07/08 03:10 | Beatrice Gumulya v Seung-Yeon Hong | 6-0,7-6 |
| ITF Women Naiman | 2018/07/04 04:10 | Meiling Wang v Seung-Yeon Hong | 6-4,6-0 |
| ITF Women Naiman | 2018/07/02 03:55 | Seung-Yeon Hong v Kwan Yau Ng | 6-3,7-5 |