| ITF China F9 | 07/21 03:25 | - | Chen, Hanxiang v 남, 지숭 | 4-6,2-6 | |
| Challenger Kaohsiung | 07/15 07:40 | 25 | 남, 지숭 v 스기타, 유이치 | 4-6,2-6 | |
| ITF Korea F1 Qual | 05/02 02:00 | - | Cho, Min Hyeok v 남, 지숭 | 6-4,6-7,6-2 | |
| ITF Korea F1 Qual | 05/01 03:00 | - | 김, 정의 v 남, 지숭 | 1-6,7-5,2-6 | |
| ITF Korea F1 Qual | 04/30 01:00 | - | 남, 지숭 v 홍, 승찬 | 6-0,6-2 | |
| ITF Korea F1 | 04/25 03:00 | - | 충, 현 v 남, 지숭 | 6-0,6-0 | |
| ITF Korea F1 | 04/24 01:00 | - | 남, 지숭 v 나, 정웅 | 7-5,6-2 | |
| ITF Korea F1 | 04/22 01:00 | - | 남, 지숭 v Nam, Hyun Woo | Retired | |
| ITF China F3 | 03/19 02:00 | - | 남, 지숭 v 가우, 신 | Retired | |
| ITF China F2 | 03/13 04:00 | - | 장, 저 v 남, 지숭 | 2-6,6-2,6-2 | |
| ITF China F2 | 03/12 04:40 | - | Ouyang, Bowen v 남, 지숭 | 1-6,6-7 | |
| ITF China F1 | 03/06 02:00 | - | 남, 지숭 v 바이, 이앤 | 6-3,3-6,4-6 |
Nam Ji-sung (born 15 August 1993) is a South Korean tennis player. He has a career high ATP singles ranking of world No. 236 achieved on 12 August 2019. He also has a career high ATP doubles ranking of No. 102 achieved on 3 February 2020.
Playing for South Korea in Davis Cup, Nam has a W/L record of 3–7.