| ITF M25 Changwon | 06/03 02:30 | - | Ji Hoon Son v Jeong Heon Lee | 6-1,6-3 | |
| ITF M25 Changwon | 06/17 00:55 | 62 | Geun Jun Kim v Jeong Heon Lee | 6-3,6-3 | |
| ITF M25 Changwon | 06/16 01:00 | 62 | Jeong Heon Lee v Woojun Kang | 6-3,6-1 | |
| ITF M15 Daegu | 06/07 01:00 | 27 | Ezekiel Clark v Jeong Heon Lee | 6-4,6-1 | |
| ITF M15 Daegu | 06/06 04:15 | 26 | Seokhyeon Chu v Jeong Heon Lee | Retired | |
| ITF M15 Daegu | 06/05 02:25 | 25 | Jeong Heon Lee v Tsung-Hao Huang | 7-5,6-4 | |
| ITF M15 Daegu | 06/04 02:30 | 19 | Jeong Heon Lee v Jungwon Park | 6-7,6-1,10-2 | |
| ITF M15 Daegu | 06/03 03:10 | 62 | Dong Ju Kim v Jeong Heon Lee | 6-3,3-6,6-10 | |
| ITF M25 Anseong | 06/18 01:00 | 62 | Seong Yong Han v Jeong Heon Lee | 6-4,6-1 | |
| ITF M25 Changwon | 06/12 03:10 | 62 | Jeong Heon Lee v Jun Ha Hyun | 4-6,2-6 | |
| ITF M25 Changwon | 06/11 05:55 | 62 | Jeong Heon Lee v Silvia Njiric | 6-2,6-1 | |
| ITF M25 Daegu | 06/05 06:30 | 62 | Jake Delaney v Jeong Heon Lee | 6-2,6-1 | |
| ITF M25 Daegu | 06/05 00:50 | 62 | Jeong Heon Lee v Fabien Reboul | 6-2,7-5 | |
| ITF M15 Daegu | 08/29 00:30 | 62 | Jeong Heon Lee v Woodam Song | 7-6,6-7,5-10 | |
| ITF M15 Changwon | 10/13 03:00 | 44 | Jeong Heon Lee v Hyung-Chan Lim | 1-6,1-6 | |
| ITF M15 Gimcheon | 06/12 06:10 | 25 | Jeong Heon Lee v Thomas Fancutt | 2-6,1-6 | |
| ITF M15 Gimcheon | 06/11 02:35 | 54 | Geun Jun Kim v Jeong Heon Lee | 6-2,1-6,4-10 | |
| ITF M15 Gimcheon | 06/10 05:45 | 54 | Jeong Heon Lee v Seong Jae Han | 6-3,6-0 | |
| ITF Korea F5 | 08/18 01:00 | 62 | Ki Su Jung v Jeong Heon Lee | 6-3,6-1 | |
| ITF Korea F4 | 08/14 04:40 | 25 | Jeong Heon Lee v Mark Whitehouse | 0-6,0-6 | |
| ITF Korea F4 | 08/13 01:00 | 62 | Cheong Hwi Kim v Jeong Heon Lee | 3-6,6-3,3-6 | |
| ITF Korea F4 | 08/12 02:00 | 62 | Jeong Heon Lee v Worarin Kumthonkittikul | 6-2,6-3 | |
| ITF Korea F4 | 08/11 01:00 | 62 | Jeong Heon Lee v Hyun Bin Jin | 6-1,6-2 | |
| ITF Korea F2 | 06/10 06:30 | 44 | Chukang Wang v Jeong Heon Lee | 2-6,6-3,6-0 | |
| ITF Korea F2 | 06/09 02:00 | 44 | Jeong Heon Lee v Young Min Joo | 6-4,6-1 | |
| ITF Korea F1 | 06/02 01:00 | 44 | Jeong Heon Lee v Seong Woon Yu | 6-1,3-6,2-6 | |
| ITF Korea F5 | 06/28 02:25 | 25 | Jeong Heon Lee v Jae Hwan Kim | 1-6,4-6 | |
| ITF Korea F5 | 06/26 01:30 | 62 | Dae-Hee Lee v Jeong Heon Lee | 4-6,6-2,4-6 | |
| ITF Korea F4 | 06/17 03:00 | 62 | Jeong Heon Lee v Woo-Ram Kim | 4-6,2-6 |