ITF - M15 Antalya 01/19 14:40 25 [428] Nam, Ji Sung v Grigoriy Lomakin [322] 6-1,6-2
ITF - M15 Antalya 01/13 07:10 25 Jorge Martinez Martinez v Nam, Ji Sung 6-7,6-2,13-11
Challenger Columbus 09/22 14:00 26 [382] Nam, Ji Sung v Alex Bolt [147] 6-7,4-6
Challenger Columbus 09/21 14:00 25 [419] Yunseong Chung v Nam, Ji Sung [382] 6-3,4-6,6-7
Coupe Davis 09/17 16:00 1 Rubin Statham v Nam, Ji Sung 2-6,2-6
ITF - M15 Monastir 06/30 08:30 25 Nam, Ji Sung v Moez Echargui 3-6,4-6
ITF - M15 Monastir 06/22 10:50 25 Nam, Ji Sung v Rinky Hijikata 3-6,1-6
ITF - M15 Monastir 06/16 08:30 25 Nam, Ji Sung v Aidan Mayo 6-4,3-6,2-6
ITF - M15 Monastir 06/11 08:30 27 Nam, Ji Sung v Beale, Jeremy 1-6,6-1,6-7
ITF - M15 Monastir 06/10 08:25 26 Nam, Ji Sung v Crepaldi, Erik 6-4,7-5
ITF - M15 Monastir 06/09 11:15 25 Nam, Ji Sung v Badenhorst, Devin 6-7,6-2,7-6
ATP Great Ocean Road Open 02/02 01:00 24 Nam, Ji Sung v Dane Sweeny 6-7,5-7
ATP - Delray Beach 01/07 17:30 25 [52] Tommy Paul v Nam, Ji Sung [268] 6-1,6-4
Coupe Davis 03/07 11:20 45 Fabio Fognini v Nam, Ji Sung Cancelled
Coupe Davis 03/06 14:10 45 [79] Gianluca Mager v Nam, Ji Sung [238] 6-3,7-5
Challenger Columbus 02/27 17:10 26 [243] Nam, Ji Sung v Marc Polmans [123] 3-6,5-7
Challenger Columbus 02/26 18:25 25 [243] Nam, Ji Sung v Glasspool, Lloyd [447] 6-3,6-2
Drummondville, Canada 02/20 16:55 26 [115] Christopher O'Connell v Nam, Ji Sung [242] 6-1,4-6,6-4
Drummondville, Canada 02/19 18:00 25 Song, Evan v Nam, Ji Sung 2-6,1-6
Challenger - Cleveland 02/11 19:50 25 [245] Nam, Ji Sung v Sarmiento, Raymond [431] 3-6,2-6
Open d'Australie 01/14 01:25 44 [198] Frederico Ferreira Silva v Nam, Ji Sung [241] 2-6,6-4,6-4
Challenger Noumea 01/07 00:00 24 [186] Joao Menezes v Nam, Ji Sung [240] 4-6,6-1,6-3
Challenger Noumea 01/05 23:30 28 [240] Nam, Ji Sung v Tung-Lin Wu [230] 6-4,3-6,6-3
Open d'Australie Playoff Wilcard Australienne 12/06 03:55 27 [252] Nam, Ji Sung v Tatsuma Ito [148] 6-3,1-6,1-6
Open d'Australie Playoff Wilcard Australienne 12/04 03:50 26 Bu Yunchaokete v Nam, Ji Sung 4-6,0-6
Nonthaburi, Simples M-ITF-THA-06A 11/30 03:00 28 [307] Shintaro Imai v Nam, Ji Sung [252] 7-6,7-6
Nonthaburi, Simples M-ITF-THA-06A 11/29 02:55 27 Sora Fukuda v Nam, Ji Sung 2-6,1-6
Nonthaburi, Simples M-ITF-THA-06A 11/28 02:30 26 Saito, Takashi v Nam, Ji Sung 7-5,3-6,1-6
Nonthaburi, Simples M-ITF-THA-06A 11/26 07:20 25 Taisei Ichikawa v Nam, Ji Sung 5-7,2-6
Challenger Kobe 11/08 03:00 27 [259] Nam, Ji Sung v Yosuke Watanuki [302] Retired

Wikipedia - Nam Ji-sung

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.