Stadium: Center Court Round: 24 Ground: Hardcourt outdoor
| Challenger Yokkaichi | 2019/08/09 04:30 | Sho Shimabukuro v Ji Sung Nam | 6-7,6-3,6-2 |
| Challenger Yokkaichi | 2019/08/08 03:20 | Ji Sung Nam v Hiroki Moriya | 6-2,5-7,7-6 |
| Challenger Yokkaichi | 2019/08/06 04:35 | Ji Sung Nam v Jumpei Yamasaki | 6-3,6-2 |
| Challenger Chengdu | 2019/08/02 04:00 | Ji Sung Nam v Hyeon Chung | 6-7,6-1,3-6 |
| Challenger Chengdu | 2019/08/01 03:00 | Dayne Kelly v Ji Sung Nam | 6-7,3-6 |
| Challenger Chengdu | 2019/07/31 03:50 | Mao-Xin Gong v Ji Sung Nam | 6-7,1-6 |
| Challenger Nur-Sultan | 2019/07/18 06:50 | Evgeny Donskoy v Ji Sung Nam | 3-6,6-1,6-4 |
| Challenger Nur-Sultan | 2019/07/16 08:25 | Teymuraz Gabashvili v Ji Sung Nam | 6-1,4-6,2-6 |
| ITF M15 Jakarta | 2019/08/12 02:30 | Cheng-Yu Yu v Kunal Anand | 6-4,4-6,6-10 |
| ITF M25 Taipei | 2019/07/23 06:10 | Cheng-Yu Yu v Sora Fukuda | 6-3,5-7,6-4 |
| ITF M25 Taipei | 2019/07/20 02:00 | Cheng-Yu Yu v Yu Hsiou Hsu | 5-7,2-6 |
| ITF M25 Taipei | 2019/07/19 02:00 | Jesse Delaney v Cheng-Yu Yu | 0-6,3-6 |
| ITF M25 Taipei | 2019/07/18 10:10 | Cheng-Yu Yu v Yusuke Takahashi | 7-5,6-2 |
| ITF M25 Taipei | 2019/07/17 04:25 | Jonathan Mridha v Cheng-Yu Yu | 2-6,1-6 |
| ITF M25 Shenzhen | 2019/06/13 03:30 | Cheng-Yu Yu v Luca Castelnuovo | 1-6,1-6 |
| ITF M25 Shenzhen | 2019/06/11 07:40 | Boris Butulija v Cheng-Yu Yu | 6-3,4-6,6-7 |