| Challenger Gwangju | 04/17 02:00 | 26 | [248] 카치마조브, 알리베크 v 남, 지숭 [123] | 6-4,6-3 | |
| Challenger Gwangju | 04/16 02:00 | 25 | [123] 남, 지숭 v 비르타넨, 오토 [161] | 6-4,6-3 | |
| Challenger Busan | 04/08 04:30 | 25 | [269] Sekulic, Philip v 남, 지숭 [138] | 6-1,6-4 | |
| Kashiwa, Singles Qualifying M-ITF-JPN-05A | 04/04 01:25 | 26 | 남, 지숭 v Imamura, Masamichi | 3-6,4-6 | |
| Kashiwa, Singles Qualifying M-ITF-JPN-05A | 04/02 01:00 | 25 | 남, 지숭 v 쿠마사카, 타쿠야 | 7-6,3-6,6-4 | |
| Mildura, Singles M-ITF-AUS-02A | 03/12 02:05 | 25 | [289] 볼트, 알렉스 v 남, 지숭 [141] | 7-6,6-2 | |
| Challenger Yokkaichi | 11/28 02:45 | 25 | [319] 우치다, 카이치 v 남, 지숭 [128] | 7-6,2-6,6-1 | |
| Challenger Yokkaichi | 11/27 02:15 | 19 | [131] 남, 지숭 v 푸테르길, 칼룸 [178] | 4-6,6-1,6-0 | |
| Challenger Yokkaichi | 11/26 04:10 | 14 | [426] 순, 파징 v 남, 지숭 [131] | 3-6,2-6 | |
| Challenger Sydney | 11/03 00:00 | 27 | [146] 남, 지숭 v 히지카타, 린키 [80] | 7-6,5-7,6-7 | |
| Challenger Sydney | 11/01 23:00 | 26 | [146] 남, 지숭 v 스위니, 단 [261] | 6-4,6-2 | |
| Challenger Sydney | 10/30 23:00 | 25 | [244] 스쿨케이트, 트리스탄 v 남, 지숭 [146] | 6-7,4-6 |
Nam Ji-sung (born 15 August 1993, in Busan) is a South Korean tennis player.
Nam has a career high ATP singles ranking of 236 achieved on 12 August 2019. He also has a career high ATP doubles ranking of 102 achieved on 3 February 2020.
Playing for South Korea in Davis Cup, Nam has a W/L record of 3–7.