Park Ui-sung (; born 27 September 2000) is a South Korean tennis player. He has a career-high ranking of No. 546 achieved on 26 June 2023 and a doubles ranking of No. 212 achieved on 30 March 2026.
Park has a career high ITF junior combined ranking of No. 3 achieved on 1 January 2018.
Challenger and World Tennis Tour Finals
Singles: 6 (3-3) Legend (singles)ATP Challenger Tour (0-0)ITF World Tennis Tour (3-3)Titles by surfaceHard (3–3)Clay (0-0)Grass (0–0)Carpet (0–0)
ResultW–LDateTournamentTierSurfaceOpponentScoreLoss0–1M15 Sharm El Sheikh, EgyptWorld Tennis TourHard Saba Purtseladze4–6, 4–6Win1–1M15 Daegu, South KoreaWorld Tennis TourHard Kim Cheong-Eui6–3, 6–4Win2–1M25 Daegu, South KoreaWorld Tennis TourHard Lee Jea-moon6–3, 7–5Loss2–2M15 Daegu, South KoreaWorld Tennis TourHard Nam Ji-sung1–6, 2–6Win3–2M15 Wuning, ChinaWorld Tennis TourHard Taisei Ichikawa6–2, 6–3Loss3–3M15 Wuning, ChinaWorld Tennis TourHard Jake Delaney5–7, 4–6
Doubles: 27 (13–13) Legend (singles)ATP Challenger Tour (2–2)ITF World Tennis Tour (11–12)Titles by surfaceHard (12–10)Clay (1–4)Grass (0–0)Carpet (0–0)
ResultW–LDateTournamentTierSurfacePartnerOpponentsScoreLoss0–1Turkey F38, AntalyaFuturesClay Jeong Yeong-Seok Wilson Leite Jeroen Vanneste2-6, 2–6Loss0–2M15 Cairo, EgyptWorld Tennis TourClay Jeong Yeong-Seok Alexander Igoshin Bernardo Saraiva6-4, 2–6, [4–10]Loss0–3M15 Anseong, South KoreaWorld Tennis TourClay Jeong Yeong-Seok Haru Inoue Ryota Tanuma(W/O)Win1–3M15 Monastir, TunisiaWorld Tennis TourHard Siddhant Banthia Jeremy Beale Ajeet Rai(W/O)Loss1–4M15 Heraklion, GreeceWorld Tennis TourHard Harry Wendelken Filip Bergevi Kai Wehnelt6–7(8–10), 6–4, [7–10]Loss1–5M15 Sharm El Sheikh, EgyptWorld Tennis TourHard Sergey Fomin Jiri Barnat Filip Duda3–6, 2–6Loss1–6M15 Tay Ninh, VietnamWorld Tennis TourHard Son Ji Hoon Francis Casey Alcantara Lý Hoàng Nam3–6, 1–6Win2–6M25 Sharm El Sheikh, EgyptWorld Tennis TourHard Jeong Yeong-Seok Jacopo Berrettini Francesco Forti6–1, 7–6(11–9)Win3–6M25 Daegu, South KoreaWorld Tennis TourHard Jeong Yeong-Seok Cho Seung Woo Kim Dong Ju2–6, 6–0, [10–5]Win4–6M25 Huzhou, ChinaWorld Tennis TourHard Jeong Yeong-seok Li Zekai Jin Yuquan 7–6(9–7), 6–1Loss4–7M25 Bhopal, India World Tennis TourHard Jeong Yeong-seok Chirag Duhan Dev Javia6–4, 1–6, [2–10]Win5–7M15 Nonthaburi, ThailandWorld Tennis TourHard Jeong Yeong-seok Thanapet Chanta Yuttana Charoenphon2–6, 6–2, [10–4]Win6–7M15 Lu'an, ChinaWorld Tennis TourHard Jeong Yeong-seok Hsieh Cheng-peng Yang Mingyuan 6–4, 3–6, [10–8]Win7–7M25 Baotou, ChinaWorld Tennis TourClay (i) Jeong Yeong-seok Jin Yuquan Li Zekai 6–4, 7–6(7–4)Win8–7M15 Lu'an, ChinaWorld Tennis TourHard Huang Tsung-hao Liu Shaoyun Lu Pengyu 6–1, 7–5Loss8–8M15 Daegu, South KoreaWorld Tennis TourHard Kwon Soon-woo Yusuke Kusuhara Shunsuke Nakagawa3–6, 4–6Loss8–9M25 Changwon, South KoreaWorld Tennis TourHard Jeong Yeong-seok Chung Hong Son Ji-hoon4–6, 2–6Loss8–10M25 Luzhou, ChinaWorld Tennis TourHard Jeong Yeong-seok Luca Castelnuovo Zheng Baoluo6–3, 6–7(3–7), [4–10]Win9–10M15 Nakhon Pathom, ThailandWorld Tennis TourHard Wishaya Trongcharoenchaikul Jake Delaney Ryotaro Taguchi 7–6(7–5), 2–6, [10–6]Loss9–11Astana, KazakhstanChallengerHard Francis Alcantara Taisei Ichikawa Kokoro Isomura5–7, 6–2, [5–10]Win10–11M15 Ma'anshan, ChinaWorld Tennis TourHard (i) Nam Ji-sung Cho Seong-woo Yang Zijiang 6–3, 4–6, [10–7]Loss10–12Jingshan, ChinaChallengerClay Huang Tsung-hao Anirudh Chandrasekar Reese Stalder2–6, 6–2, [7–10]Win11–12Phan Thiết, VietnamChallengerHard Nam Ji-sung Joshua Charlton Iván Marrero Curbelo6–4, 6–3Loss11–13M15 Ma'anshan, ChinaWorld Tennis TourHard (i) Hsieh Cheng-peng Andre Ilagan Evan Zhu3–6, 3–6Win12–13M15 Wuning, ChinaWorld Tennis TourHard Choe Jae-sung Lachlan McFadzean Ashton McLeod6–3, 6–3Loss12–14M15 Wuning, ChinaWorld Tennis TourHard Choe Jae-sung Jake Delaney Jesse Delaney2–6, 7–6(7–4), [7–10]Win13–14Zhangjiagang, ChinaChallengerHard Nam Ji-sung Joshua Charlton Wang Aoran6–3, 4–6, [13–11]
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