Stadium: Court 2 Round: 27 Ground: Hardcourt outdoor
| ITF Korea F1 | 2014/04/25 03:00 | Chung, Hyeon v Nam, Ji Sung | 6-0,6-0 |
| Chengdu, China | 2019/08/01 03:00 | Kelly, Dayne v Nam, Ji Sung | 6-7,3-6 |
| Chengdu, China | 2019/07/31 03:50 | Gong, Mao Xin v Nam, Ji Sung | 6-7,1-6 |
| Nur Sultan, Kazakhstan | 2019/07/18 06:50 | Evgeny Donskoy v Nam, Ji Sung | 3-6,6-1,6-4 |
| Nur Sultan, Kazakhstan | 2019/07/16 08:25 | Gabashvili, Teimuraz v Nam, Ji Sung | 6-1,4-6,2-6 |
| Almaty, Singles Qualifying M-ITF-KAZ-05A | 2019/07/12 04:00 | Nam, Ji Sung v Golubev, Andrey | 3-6,3-6 |
| Almaty, Singles Qualifying M-ITF-KAZ-05A | 2019/07/11 04:00 | Nam, Ji Sung v Ayap, Sagadat | 6-1,3-6,6-1 |
| Almaty, Singles Qualifying M-ITF-KAZ-05A | 2019/07/09 07:30 | Nam, Ji Sung v Narbekov, Sultan | 6-1,6-1 |
| Challenger Columbus | 2019/06/16 17:55 | Nam, Ji Sung v Torpegaard, Mikael | 1-6,5-7 |
| Chengdu, China | 2019/08/01 03:00 | Wu, Di v Chung, Hyeon | 6-7,7-6,3-6 |
| Chengdu, China | 2019/07/30 08:10 | Takeuchi, Kento (1987) v Chung, Hyeon | 3-6,2-6 |
| ATP - Rotterdam | 2019/02/11 20:05 | Chung, Hyeon v Nikoloz Basilashvili | 6-4,6-7,2-6 |
| Open d'Australie | 2019/01/17 03:40 | Chung, Hyeon v Pierre-Hugues Herbert | 2-6,6-1,2-6,4-6 |
| Open d'Australie | 2019/01/15 01:40 | Chung, Hyeon v Klahn, Bradley | 6-7,6-7,6-3,6-2,6-4 |
| ATP - Auckland | 2019/01/08 02:15 | Rubin Statham v Chung, Hyeon | 7-5,6-3 |
| ATP Pune | 2019/01/02 09:30 | Gulbis, Ernests v Chung, Hyeon | 7-6,6-2 |
| Mubadala World Tennis Championship | 2018/12/28 11:00 | Chung, Hyeon v Dominic Thiem | 6-2,6-3 |