Stadium: Court 2 Round: 44 Ground: Hardcourt outdoor
| ITF M15 Anseong | 2019/06/28 03:00 | Na, Jung-Woong v Kim, Cheong-Eui | 2-6,2-6 |
| Gimcheon, Singles M-ITF-KOR-03A | 2019/06/12 04:05 | Na, Jung-Woong v Kim, Cheong-Eui | 6-2,6-2 |
| ITF M15 Daegu | 2019/06/08 05:30 | Kim, Cheong-Eui v Na, Jung-Woong | 2-6,1-6 |
| ITF Korea F4 | 2017/06/22 02:00 | Na, Jung-Woong v Kim, Cheong-Eui | 6-4,2-6,1-6 |
| ITF China F1 | 2014/03/04 02:00 | Na, Jung-Woong v Kim, Cheong-Eui | 6-7,3-6 |
| Nonthaburi, Singles M-ITF-THA-01A | 2020/02/03 04:15 | Kim, Cheong-Eui v Natthasith Kunsuwan | 7-6,6-2 |
| Nonthaburi, Singles M-ITF-THA-01A | 2020/02/02 09:00 | Kim, Cheong-Eui v Sincharoenwattana, Nutdanai | 6-4,6-1 |
| Nonthaburi, Singles M-ITF-THA-01A | 2020/01/27 02:30 | Wattanakul, Pol v Kim, Cheong-Eui | 6-3,6-4 |
| Nonthaburi, Singles M-ITF-THA-01A | 2020/01/26 04:05 | Natthasith Kunsuwan v Kim, Cheong-Eui | 6-7,3-6 |
| Nonthaburi, Simples M-ITF-THA-06A | 2019/12/05 04:15 | Rishab Agarwal v Kim, Cheong-Eui | 6-4,3-6,6-3 |
| Nonthaburi, Simples M-ITF-THA-06A | 2019/11/26 05:55 | Kalenichenko, Danylo v Kim, Cheong-Eui | 6-2,6-2 |
| ITF M15 Changwon | 2019/10/17 00:55 | Kim, Cheong-Eui v Chung, Hong | 3-6,6-3,3-6 |
| ITF M15 Changwon | 2019/10/15 03:10 | Kim, Cheong-Eui v Issei Okamura | 6-4,4-6,6-4 |
| Nonthaburi, Singles M-ITF-THA-01A | 2020/02/03 03:55 | Kerdlaphee, Kittirat v Na, Jung-Woong | 2-6,1-6 |
| Nonthaburi, Singles M-ITF-THA-01A | 2020/02/02 02:30 | Yuttana Charoenphon v Na, Jung-Woong | 0-6,1-6 |
| Nonthaburi, Singles M-ITF-THA-01A | 2020/01/30 07:05 | Na, Jung-Woong v Sekiguchi, Shuichi | 1-6,4-6 |
| Nonthaburi, Singles M-ITF-THA-01A | 2020/01/29 02:30 | Na, Jung-Woong v Wishaya Trongcharoenchaikul | 7-6,7-6 |
| Nonthaburi, Singles M-ITF-THA-01A | 2020/01/28 03:55 | Navasirisomboon, Jirat v Na, Jung-Woong | 6-2,2-6,3-10 |
| Nonthaburi, Singles M-ITF-THA-01A | 2020/01/27 05:30 | Moritani, Soichiro v Na, Jung-Woong | 3-6,3-6 |
| Nonthaburi, Singles M-ITF-THA-01A | 2020/01/26 09:20 | Na, Jung-Woong v Runhao Hua | 2-6,7-6,10-5 |
| ITF M15 Changwon | 2019/10/18 01:00 | Yuta Shimizu v Na, Jung-Woong | 6-3,7-5 |