Nam Ji-sung
Nam Ji-sung 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. In 2024, he became the first Korean in 13 years to win the Busan Open in doubles.
Playing for South Korea in Davis Cup, Nam has a W/L record of 3–7.
Challenger and Futures/World Tennis Tour finals
Singles: 16 (5–11)
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score | |||||||||||||||
| Win | 1–0 | Japan F5, Karuizawa | Futures | Clay |  dts|Jul 2012Doubles: 70 (36 titles, 34 runners-up)
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