Country
Birthdate
Height
Weight
Profi since
Play
Ranking's position
Points
Prize money
Birthdate
Height
Weight
Profi since
Play
Ranking's position
Points
Prize money
Republic of Korea
30.06.88, 36 years
30.06.88, 36 years
Jung-Woong Na vs. Sung-Keun Jeong - head to head matches
| 18.05.15 | q 1 | Jung-Woong Na | Sung-Keun Jeong | 6-2, 6-2 | match details |  Korea F1 | Hard |
Jung-Woong Na form & Sung-Keun Jeong form
Jung-Woong Na - last matches
| M25 Anseong - Clay | ||||
| 18.06.23 q 1 | vs. Jae Myeong Lee | 4-6, 5-7 |  | match details |
| M25 Changwon - Hard | ||||
| 15.06.23 2nd round | vs. Yuki Mochizuki | 4-6, 3-6 | | match details |
| 14.06.23 1st round | vs. Jae Hwan Kim | 6-1, 6-1 |  | match details |
| 12.06.23 q 2 | vs. Young Seok Kim | 6-2, 6-2 | | match details |
| 12.06.23 qual. | vs. Young Seok Lee | 6-4, 6-3 | | match details |
| 11.06.23 q 1 | vs. Yongjun Shim | 6-2, 6-2 | | match details |
| M25 Daegu - Hard | ||||
| 07.06.23 1st round | vs. Jake Delaney | 7-65, 4-6, 2-6 | | match details |
| M15 Daegu - Hard | ||||
| 31.08.22 1st round | vs. Ryuki Matsuda | 6-72, 1-6 | | match details |
| M15 Changwon - Hard | ||||
| 21.08.22 q 1 | vs. Seon Yong Han | 6-3, 6-77, 7-10 | | match details |
 M25 Nonthaburi - Hard | ||||
| 05.02.20 1st round | vs. Matija Pecotic | 0-6, 2-6 | | match details |
| 04.02.20 qual. | vs. Cheong-Eui Kim | 5-7, 6-1, 10-7 | | match details |
| 03.02.20 q 2 | vs. Kittirat Kerdlaphee | 6-2, 6-1 | | match details |
| 02.02.20 q 1 | vs. Yuttana Charoenphon | 6-0, 6-1 | | match details |
| M25 Nonthaburi - Hard | ||||
| 30.01.20 2nd round | vs. Shuichi Sekiguchi | 1-6, 4-6 | | match details |
| 29.01.20 1st round | vs. Wishaya Trongcharoenchaikul | 7-64, 7-63 | | match details |
| 28.01.20 qual. | vs. Jirat Navasirisomboon | 2-6, 6-2, 10-3 | | match details |
| 27.01.20 q 2 | vs. Soichiro Moritani | 6-3, 6-3 | | match details |
| 26.01.20 q 1 | vs. Runhao Hua | 2-6, 7-62, 10-5 | | match details |
| M15 Changwon - Hard | ||||
| 18.10.19 1/4 | vs. Yuta Shimizu | 3-6, 5-7 | | match details |
| 17.10.19 2nd round | vs. Minjong Park | 1-6, 6-0, 6-4 | | match details |
| 16.10.19 1st round | vs. Young Seok Lee | 6-2, 6-1 | | match details |
 M15 Jakarta - Hard | ||||
| 13.08.19 1st round | vs. Seong-Gook Oh | 6-3, 5-7, 2-4, - Jung-Woong Na - retired | | match details |
| M15 Anseong - Clay | ||||
| 28.06.19 1/4 | vs. Cheong-Eui Kim | 2-6, 2-6 | | match details |
| 26.06.19 1st round | vs. Seungri Choi | 6-1, 6-1 | | match details |
| 26.06.19 2nd round | vs. Tae-Woo Lee | 6-3, 6-3 | | match details |
| M15 Gimcheon - Hard | ||||
| 19.06.19 2nd round | vs. Sanhui Shin | 7-5, 4-6, 0-3, - Jung-Woong Na - retired | | match details |
| 19.06.19 1st round | vs. Seong Taek Im | 6-0, 6-0 | | match details |
| M15 Gimcheon - Hard | ||||
| 13.06.19 2nd round | vs. Jean Thirouin | 2-6, 3-6 | | match details |
| 12.06.19 1st round | vs. Cheong-Eui Kim | 6-2, 6-2 | | match details |
| M15 Daegu - Hard | ||||
| 09.06.19 fin | vs. Seongchan Hong | 0-6, 3-6 | | match details |
Sung-Keun Jeong - last matches
| Korea F7 - Clay | ||||
| 07.09.15 q 1 | vs. Byung-Kook Kang | 6-1, 6-1 | | match details |
| 07.09.15 q 2 | vs. Dong-Hak Sin | 6-4, 6-2 | | match details |
| 07.09.15 qual. | vs. Ho-Min Kang | 1-6, 6-75 | | match details |
| Korea F5 - Hard | ||||
| 24.08.15 q 1 | vs. Hyeong Jin Cho | 5-7, 1-2, - Sung-Keun Jeong - retired | | match details |
| Korea F4 - Hard | ||||
| 17.08.15 q 1 | vs. Woo-Ram Kim | 2-6, 3-6 | | match details |
| Korea F3 - Hard | ||||
| 10.08.15 q 1 | vs. Jae-Won Choi | 3-6, 3-6 | | match details |
| Thailand F5 - Hard | ||||
| 22.06.15 q 1 | vs. Zach Itzstein | 4-6, 2-6 | | match details |
| Thailand F4 - Hard | ||||
| 15.06.15 q 1 | vs. Roy Hobbs | 3-6, 4-6 | | match details |
| Korea F2 - Hard | ||||
| 25.05.15 q 1 | vs. Seung Dong Kim | 7-5, 6-3 | | match details |
| 25.05.15 q 2 | vs. Ilyoung Jeong | 6-2, 6-2 | | match details |
| 25.05.15 qual. | vs. A-Ram Kim | 6-2, 6-3 | | match details |
| 25.05.15 1st round | vs. Fritz Wolmarans | 1-6, 4-6 | | match details |
| Korea F1 - Hard | ||||
| 18.05.15 q 1 | vs. Jung-Woong Na | 2-6, 2-6 | | match details |
| Korea F12 - Clay | ||||
| 25.08.14 q 2 | vs. Yo-Sub Yoon | 4-6, 1-6 | | match details |
| 25.08.14 q 1 | vs. Hyeon Il Jung | 6-2, 6-0 | | match details |
| Korea F11 - Clay | ||||
| 18.08.14 q 1 | vs. Seong-Gook Oh | 1-6, 6-2, 7-64 | | match details |
| 18.08.14 q 2 | vs. Hyeong Jin Cho | 7-5, 6-0 | | match details |
| 18.08.14 qual. | vs. Sun-Yong Kim | 1-6, 0-6 | | match details |
| Korea F10 - Hard | ||||
| 11.08.14 q 2 | vs. Jae Hwan Kim | 2-6, 6-4, 6-75 | | match details |
| 11.08.14 q 1 | vs. Hyeong Jin Cho | 6-1, 4-6, 7-66 | | match details |
| Korea F8 - Hard | ||||
| 30.06.14 q 1 | vs. Hyun-Soo Lim | 6-3, 4-6, 2-6 | | match details |
| Korea F7 - Hard | ||||
| 23.06.14 qual. | vs. Jea Moon Lee | 0-6, 1-6 | | match details |
| 23.06.14 q 1 | vs. Seong Taek Im | 6-2, 6-3 | | match details |
| 23.06.14 q 2 | vs. In Kyo Jeong | 6-0, 6-1 | | match details |
| Korea F6 - Hard | ||||
| 16.06.14 q 2 | vs. Hyun-Soo Lim | 6-2, 1-6, 3-6 | | match details |
| 16.06.14 q 1 | vs. Sangmin Park | 6-4, 7-5 | | match details |
| Korea F4 - Hard | ||||
| 02.06.14 q 1 | vs. Dae-Soung Oh | 4-6, 3-6 | | match details |
| Korea F3 - Hard | ||||
| 26.05.14 1st round | vs. Hogi Kang | 3-6, 6-3, 0-6 | | match details |
| 26.05.14 q 2 | vs. Hyeong Jin Cho | 6-3, 1-6, 6-2 | | match details |
| 26.05.14 qual. | vs. Sung Jun Park | 6-0, 6-0 | | match details |
