Stadium: Court 3 Round: 25
| ITF Korea F5 | 2018/08/21 03:00 | Hong Chung v Yeongseok Jeong | 6-1,7-6 |
| Challenger Gwangju | 2018/08/13 06:30 | Yeongseok Jeong v Rubin Statham | 4-6,0-6 |
| ITF Korea F3 | 2018/06/19 08:30 | Yeongseok Jeong v Sanhui Shin | 6-4,5-7,2-6 |
| Challenger Gimcheon Qual | 2018/05/05 04:40 | Yeongseok Jeong v Tung-Lin Wu | 1-6,2-6 |
| ITF Indonesia F8 Qual | 2017/11/25 05:00 | Ken Onoda v Yeongseok Jeong | 2-6,6-1,6-2 |
| ITF Korea F2 Qual | 2017/06/04 04:30 | Dong-Kyu Lee v Yeongseok Jeong | 6-4,6-1 |
| ITF Korea F2 Qual | 2017/06/03 02:00 | Yeongseok Jeong v Suk-Young Jeong | 6-2,6-1 |
| Challenger Gwangju Qual | 2018/08/11 04:45 | Vasko Mladenov v Young-Hoon Jeong | 6-0,6-2 |
| ITF China F10 Qual | 2018/07/09 04:05 | Young-Hoon Jeong v Hao Wu | 3-6,1-6 |
| ITF China F10 Qual | 2018/07/08 02:00 | Young-Hoon Jeong v David Barclay | 6-1,6-3 |
| ITF China F9 | 2018/07/05 03:00 | Hao Wu v Young-Hoon Jeong | 6-7,6-0,6-2 |
| ITF China F9 | 2018/07/03 09:45 | Bang Shuo Yin v Young-Hoon Jeong | 0-6,2-6 |
| ITF Korea F3 Qual | 2018/06/18 01:00 | Young-Hoon Jeong v Geun Jun Kim | 4-6,4-6 |
| ITF Korea F3 Qual | 2018/06/17 03:00 | Young-Hoon Jeong v Jae Won Yun | 6-2,6-2 |
| ITF Korea F3 Qual | 2018/06/16 02:00 | Young-Hoon Jeong v Sung Jun Park | 6-3,6-3 |