Stadium: Court 8 Round: 24 Ground: Hardcourt outdoor
| Nonthaburi, Singles M-ITF-THA-01A | 2019/05/26 03:00 | Nam, Ji Sung v Sekiguchi, Shuichi | 1-6,4-6 |
| Challenger Kaohsiung | 2019/09/20 06:50 | Nam, Ji Sung v Marc Polmans | 6-3,1-6,4-6 |
| Challenger Kaohsiung | 2019/09/19 03:00 | Nam, Ji Sung v Harris, Andrew | 6-2,6-2 |
| Challenger Kaohsiung | 2019/09/18 03:30 | Tsai, Chang-Lin v Nam, Ji Sung | 4-6,1-6 |
| Coupe Davis | 2019/09/14 04:50 | Zhe Li v Nam, Ji Sung | 6-7,6-7 |
| Jinan, China | 2019/09/03 04:45 | Nedelko, Ivan v Nam, Ji Sung | 4-6,7-5,6-3 |
| Baotou, Chine | 2019/08/29 02:00 | Nam, Ji Sung v Yan Bai | 3-6,6-4,5-7 |
| Baotou, Chine | 2019/08/27 05:40 | Nam, Ji Sung v Arjun Kadhe | 6-3,6-3 |
| Challenger Yokkaichi | 2019/08/09 04:30 | Sho Shimabukuro v Nam, Ji Sung | 6-7,6-3,6-2 |
| ITF M25 Tay Ninh | 2019/10/08 05:45 | Sidharth Rawat v Sekiguchi, Shuichi | 0-6,1-6 |
| Challenger Kaohsiung | 2019/09/17 12:15 | Sekiguchi, Shuichi v Gunneswaran, Prajnesh | 3-6,2-6 |
| Challenger Kaohsiung | 2019/09/16 06:05 | Ray Ho v Sekiguchi, Shuichi | 6-7,3-6 |
| Challenger Shanghai | 2019/09/12 06:30 | Yasutaka Uchiyama v Sekiguchi, Shuichi | 6-4,6-3 |
| Challenger Shanghai | 2019/09/11 06:45 | Sekiguchi, Shuichi v Myneni, Saketh | 4-6,6-3,7-6 |
| Challenger Shanghai | 2019/09/09 06:05 | Grills, Jacob v Sekiguchi, Shuichi | 6-3,1-6,1-6 |
| Jinan, China | 2019/09/04 06:30 | Akira Santillan v Sekiguchi, Shuichi | 6-1,6-2 |
| Jinan, China | 2019/09/03 04:55 | Mukund Sasikumar v Sekiguchi, Shuichi | 3-6,3-6 |