Stadium: Court 1 Round: 25 Ground: Hardcourt indoor
| Australian Open | 2020/01/14 01:25 | Frederico Ferreira Silva v Ji Sung Nam | 2-6,6-4,6-4 |
| Challenger Noumea | 2020/01/07 00:00 | Joao Menezes v Ji Sung Nam | 4-6,6-1,6-3 |
| Challenger Noumea | 2020/01/05 23:30 | Ji Sung Nam v Tung-Lin Wu | 6-4,3-6,6-3 |
| Australian Open WC | 2019/12/06 03:55 | Ji Sung Nam v Tatsuma Ito | 6-3,1-6,1-6 |
| Australian Open WC | 2019/12/04 03:50 | Bu Yunchaokete v Ji Sung Nam | 4-6,0-6 |
| ITF M15 Nonthaburi | 2019/11/30 03:00 | Shintaro Imai v Ji Sung Nam | 7-6,7-6 |
| ITF M15 Nonthaburi | 2019/11/29 02:55 | Sora Fukuda v Ji Sung Nam | 2-6,1-6 |
| ITF M15 Nonthaburi | 2019/11/28 02:30 | Takashi Saito v Ji Sung Nam | 7-5,3-6,1-6 |
| Challenger Cleveland | 2020/02/10 18:45 | Alexander Brown v Raymond Sarmiento | 4-6,2-6 |
| Challenger Newport Beach | 2020/01/31 18:00 | Mitchell Krueger v Raymond Sarmiento | 6-3,6-7,6-3 |
| Challenger Newport Beach | 2020/01/30 21:55 | Raymond Sarmiento v JC Aragone | 7-5,7-6 |
| Challenger Newport Beach | 2020/01/28 22:20 | Mackenzie McDonald v Raymond Sarmiento | 5-7,4-6 |
| Challenger Newport Beach | 2020/01/27 21:00 | Kevin King v Raymond Sarmiento | 4-6,5-7 |
| ITF M25 Los Angeles | 2020/01/10 18:00 | Raymond Sarmiento v Emilio Nava | 6-4,3-6,4-6 |
| ITF M25 Los Angeles | 2020/01/09 21:05 | Raymond Sarmiento v Facundo Diaz Acosta | 6-4,6-4 |
| ITF M25 Los Angeles | 2020/01/08 19:40 | Sandro Ehrat v Raymond Sarmiento | 6-7,7-6,4-6 |