Stadium: Court 2 Round: 26 Ground: Hardcourt outdoor
| ITF Thailand F9 | 2015/06/26 03:00 | Sekiguchi, Shuichi v Na, Jung-Woong | 6-4,6-3 |
| 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 |
| ITF M15 Changwon | 2019/10/17 03:35 | Park, Minjong v Na, Jung-Woong | 6-1,0-6,4-6 |
| ITF M15 Changwon | 2019/10/16 00:55 | Lee, Young Seok v Na, Jung-Woong | 2-6,1-6 |
| ITF M15 Anseong | 2019/06/28 03:00 | Na, Jung-Woong v Kim, Cheong-Eui | 2-6,2-6 |
| Nonthaburi, Singles M-ITF-THA-01A | 2020/01/29 07:25 | Kasidit Samrej v Sekiguchi, Shuichi | 3-6,2-6 |
| Bangkok-2, Thailand | 2020/01/22 05:25 | Polansky, Peter v Sekiguchi, Shuichi | 6-3,7-5 |
| ATP - Auckland | 2020/01/10 22:00 | Sekiguchi, Shuichi v Tatsuma Ito | 3-6,6-4,4-6 |
| Te Anau, Simples M-ITF-NZL-01A | 2020/01/04 00:30 | Luke Saville v Sekiguchi, Shuichi | 6-3,6-3 |
| Te Anau, Simples M-ITF-NZL-01A | 2020/01/02 21:00 | Stoupe, George v Sekiguchi, Shuichi | 3-6,1-6 |
| Te Anau, Simples M-ITF-NZL-01A | 2020/01/01 22:00 | Calum Puttergill v Sekiguchi, Shuichi | 6-2,2-6,2-6 |
| Te Anau, Simples M-ITF-NZL-01A | 2019/12/31 05:15 | Sam Ryan Ziegann v Sekiguchi, Shuichi | 2-6,3-6 |
| Challenger - Pune | 2019/11/14 06:30 | Sekiguchi, Shuichi v Ortega-Olmedo, Roberto | 2-6,4-6 |