Stadium: Court 8 Round: 24 Ground: Hardcourt outdoor
| ITF M25 Nonthaburi | 2019/05/26 03:00 | Ji Sung Nam v Shuichi Sekiguchi | 1-6,4-6 |
| Challenger Kaohsiung | 2019/09/20 06:50 | Ji Sung Nam v Marc Polmans | 6-3,1-6,4-6 |
| Challenger Kaohsiung | 2019/09/19 03:00 | Ji Sung Nam v Andrew Harris | 6-2,6-2 |
| Challenger Kaohsiung | 2019/09/18 03:30 | Chang-Lin Tsai v Ji Sung Nam | 4-6,1-6 |
| Davis Cup | 2019/09/14 04:50 | Zhe Li v Ji Sung Nam | 6-7,6-7 |
| Challenger Jinan | 2019/09/03 04:45 | Ivan Nedelko v Ji Sung Nam | 4-6,7-5,6-3 |
| Challenger Baotou | 2019/08/29 02:00 | Ji Sung Nam v Yan Bai | 3-6,6-4,5-7 |
| Challenger Baotou | 2019/08/27 05:40 | Ji Sung Nam v Arjun Kadhe | 6-3,6-3 |
| Challenger Yokkaichi | 2019/08/09 04:30 | Sho Shimabukuro v Ji Sung Nam | 6-7,6-3,6-2 |
| ITF M25 Tay Ninh | 2019/10/08 05:45 | Sidharth Rawat v Shuichi Sekiguchi | 0-6,1-6 |
| Challenger Kaohsiung | 2019/09/17 12:15 | Shuichi Sekiguchi v Prajnesh Gunneswaran | 3-6,2-6 |
| Challenger Kaohsiung | 2019/09/16 06:05 | Ray Ho v Shuichi Sekiguchi | 6-7,3-6 |
| Challenger Shanghai | 2019/09/12 06:30 | Yasutaka Uchiyama v Shuichi Sekiguchi | 6-4,6-3 |
| Challenger Shanghai | 2019/09/11 06:45 | Shuichi Sekiguchi v Saketh Myneni | 4-6,6-3,7-6 |
| Challenger Shanghai | 2019/09/09 06:05 | Jacob Grills v Shuichi Sekiguchi | 6-3,1-6,1-6 |
| Challenger Jinan | 2019/09/04 06:30 | Akira Santillan v Shuichi Sekiguchi | 6-1,6-2 |
| Challenger Jinan | 2019/09/03 04:55 | Mukund Sasikumar v Shuichi Sekiguchi | 3-6,3-6 |