Stadium: Court 8 Round: 29 Ground: Hardcourt outdoor
| ITF M25 Nonthaburi | 2019/05/25 03:00 | Ji Sung Nam v Shintaro Imai | 6-4,7-5 |
| ITF M25 Nonthaburi | 2019/05/24 04:00 | Ji Sung Nam v Khumoyun Sultanov | 6-3,6-1 |
| ITF M25 Nonthaburi | 2019/05/23 06:00 | Ji Sung Nam v Ryota Tanuma | 7-6,6-3 |
| Challenger Gwangju | 2019/05/14 06:00 | Ji Sung Nam v Yuichi Sugita | 2-6,2-6 |
| Challenger Gwangju | 2019/05/13 02:00 | Ji Sung Nam v Rio Noguchi | 6-2,6-1 |
| Challenger Busan | 2019/05/06 07:40 | Cem Ilkel v Ji Sung Nam | 6-4,7-6 |
| Challenger Seoul | 2019/05/01 02:00 | Ji Sung Nam v Ramkumar Ramanathan | 3-6,6-7 |
| Challenger Seoul | 2019/04/30 03:35 | Ji Sung Nam v Duckhee Lee | 7-5,6-1 |
| ITF M25 Nonthaburi | 2019/05/25 05:15 | Harry Bourchier v Shuichi Sekiguchi | 4-6,4-6 |
| ITF M25 Nonthaburi | 2019/05/24 04:45 | Shuichi Sekiguchi v Kelsey Stevenson | 7-6,6-2 |
| ITF M25 Nonthaburi | 2019/05/23 06:45 | Shuichi Sekiguchi v Jayden Court | 6-4,6-1 |
| ITF M25 Nonthaburi | 2019/05/21 09:55 | Shuichi Sekiguchi v Sonchat Ratiwatana | 7-5,6-0 |
| ITF M25 Wuhan | 2019/05/12 02:00 | Yan Bai v Shuichi Sekiguchi | 6-2,6-4 |
| ITF M25 Wuhan | 2019/05/11 02:00 | Shuichi Sekiguchi v Wishaya Trongcharoenchaikul | 7-6,7-5 |
| ITF M25 Wuhan | 2019/05/10 03:20 | Tyler Lu v Shuichi Sekiguchi | 1-6,0-6 |
| ITF M25 Wuhan | 2019/05/09 04:05 | Hong Kit Wong v Shuichi Sekiguchi | 2-6,3-6 |