Stadium: Court 1 Round: 54 Ground: Clay
| ITF Thailand F12 Qual | 2017/12/10 03:00 | Kim, Young Seok v Jeong, Young-Hoon | 4-6,3-6 |
| Gimcheon, Singles M-ITF-KOR-03A | 2019/06/17 02:50 | Kim, Sung Hun v Kim, Young Seok | 6-4,6-3 |
| Gimcheon, Singles M-ITF-KOR-03A | 2019/06/12 02:25 | Kim, Young Seok v Uisung Park | 4-6,2-6 |
| ITF - M15 Daegu | 2019/06/08 01:00 | Oh, Seong-Gook v Kim, Young Seok | 6-2,6-2 |
| ITF - M15 Daegu | 2019/06/06 04:45 | Taisei Ichikawa v Kim, Young Seok | 3-6,6-3,5-7 |
| ITF - M15 Daegu | 2019/06/05 05:00 | Kim, Young Seok v Niki, Takuto | 6-4,6-3 |
| ITF - M15 Daegu | 2019/06/04 03:25 | Kim, Young Seok v Kim, Kangjae | 6-1,6-0 |
| ITF - M15 Daegu | 2019/06/03 01:00 | Kim, Young Seok v Han, Jin Sung | 6-4,6-4 |
| Challenger - Busan | 2019/05/07 02:00 | Kim, Young Seok v Luke Saville | 1-6,0-6 |
| ITF M15 Anseong | 2019/06/24 01:00 | Lee, Seounghun v Jeong, Young-Hoon | 1-6,0-6 |
| Gimcheon, Singles M-ITF-KOR-03A | 2019/06/17 01:00 | Im, Seong Taek v Jeong, Young-Hoon | 5-7,6-3,10-6 |
| Gimcheon, Singles M-ITF-KOR-03A | 2019/06/13 05:00 | Jeong, Young-Hoon v Seon Yong Han | 6-3,3-6,5-7 |
| Gimcheon, Singles M-ITF-KOR-03A | 2019/06/12 01:00 | Niki, Takuto v Jeong, Young-Hoon | 4-6,6-7 |
| ITF Korea F6 | 2018/08/28 02:00 | Yeongseok Jeong v Jeong, Young-Hoon | 7-5,7-6 |
| Challenger Gwangju Qual | 2018/08/11 04:45 | Mladenov, Vasko v Jeong, Young-Hoon | 6-0,6-2 |
| ITF China F10 Qual | 2018/07/09 04:05 | Jeong, Young-Hoon v Wu, Hao | 3-6,1-6 |
| ITF China F10 Qual | 2018/07/08 02:00 | Jeong, Young-Hoon v Barclay, David | 6-1,6-3 |