Ku Yeon-woo (born 15 March 2003) is a South Korean tennis player. She has a career-high singles ranking of world No. 172, achieved on 22 June 2026, and a best doubles ranking by the WTA of No. 372, reached on 6 October 2025. She is the current No. 1 Korean singles player.
Career Ku made her WTA Tour main-draw singles debut at the 2023 Korea Open as a qualifier, losing in the first round to Claire Liu.
She received a wildcard entry into the main draw at the 2025 Korea Open, but again lost in the first round, this time to Loïs Boisson.
Performance timeline
Singles Tournament2026SRW–LGrand Slam tournaments Australian OpenQ10 / 00–0 French OpenQ10 / 00–0 WimbledonQ10 / 00–0 US OpenQ20 / 00–0Win–loss0–00 / 00–0
ITF Circuit finals Singles: 15 (8 titles, 7 runner-ups) LegendW100 tournaments (0–2)W50 tournaments (1–1)W35 tournaments (4–3)W15 tournaments (3–1)Finals by surfaceHard (8–6)Clay (0–1) ResultW–LDateTournamentTierSurfaceOpponentScoreWin 1–0 Aug 2019ITF Yeongwol, South KoreaW15 Hard Watsachol Sawatdee 3–6, 6–3, 6–2Win 2–0 Oct 2021ITF Sozopol, BulgariaW15 Hard Julia Terziyska 6–4, 6–2Win 3–0 Nov 2021ITF Lousada, PortugalW15 Hard (i) Živa Falkner 6–0, 7–5Loss 3–1 Feb 2024ITF Gurugram, IndiaW35 Hard Justina Mikulskytė 0–6, 1–6Loss 3–2 Mar 2024ITF Nagpur, IndiaW35 Clay Dalila Jakupović 1–6, 2–6Loss 3–3 Mar 2025ITF Kashiwa, JapanW15 Hard Ayano Shimizu 3–6, 3–6Win 4–3 Jun 2025ITF Taipei, TaiwanW35 Hard Rina Saigo 6–1, 6–4Loss 4–4 Jul 2025ITF Monastir, TunisiaW35 Hard Sakura Hosogi 3–6, 3–6Win 5–4 Sep 2025ITF Nakhon Pathom, ThailandW35 Hard Anchisa Chanta 6–4, 2–0 ret.Win 6–4 Oct 2025ITF Lagos, PortugalW35 Hard Carolyn Ansari 6–2, 4–6, 7–6(5)Win 7–4 Oct 2025ITF Loulé, PortugalW35 Hard Hibah Shaikh 7–6(6), 6–3Loss 7–5 Nov 2025Takasaki Open, JapanW100 Hard Himeno Sakatsume 3–6, 6–1, 4–6Loss 7–6 Nov 2025Yokohama Challenger, JapanW50 Hard Zhang Shuai 3–6, 2–6Win 8–6 Jun 2026ITF Montemor-o-Novo, PortugalW50 Hard Francisca Jorge 3–6, 6–4, 6–2Loss 8–7 Jul 2026Evansville Classic, United StatesW100 Hard Caroline Dolehide 6–7(3), 6–7(5)
Doubles: 14 (7 titles, 7 runner-ups) LegendW25/35 tournaments (4–4)W15 tournaments (3–3)Finals by surfaceHard (4–4)Clay (3–3) ResultW–LDateTournamentTierSurfacePartnerOpponentsScoreLoss 0–1 Mar 2021ITF Sharm El Sheikh, EgyptW15 Hard Raphaëlle Lacasse Alicia Barnett Lily Miyazaki 4–6, 1–6Win 1–1 Aug 2021ITF Bad Waltersdorf, AustriaW15 Clay Priska Madelyn Nugroho Giulia Crescenzi Arianna Zucchini 6–4, 6–3Loss 1–2 Aug 2021ITF Aix-en-Provence, FranceW15 Clay Maria Bondarenko Julie Belgraver Léa Tholey 1–6, 2–6Win 2–2 Sep 2021ITF Melilla, SpainW15 Clay Caijsa Hennemann Luisa Meyer auf der Heide Chantal Sauvant 6–3, 6–0Win 3–2 Oct 2021ITF Seville, SpainW25 Clay Caijsa Hennemann Lina Gjorcheska Tena Lukas 7–5, 6–1Loss 3–3 Oct 2022ITF Quinta da Lago, PortugalW25 Clay Adrienn Nagy Francisca Jorge Matilde Jorge 4–6, 4–6Win 4–3 May 2023ITF Incheon, South KoreaW25 Hard Choi Ji-hee Li Yu-yun Tang Qianhui 6–1, 6–1Loss 4–4 Jul 2023Open Castilla y León, SpainW25 Hard Diāna Marcinkēviča Rasheeda McAdoo Alexandra Osborne 4–6, 3–6Loss 4–5 Mar 2024ITF Nagpur, IndiaW35 Clay Justina Mikulskytė Irina Bara Dalila Jakupović 7–6(8), 6–7(5), [7–10]Win 5–5 Mar 2025ITF Kashiwa, JapanW15 Hard Naho Sato Eri Shimizu Kisa Yoshioka 6–2, 6–4Loss 5–6 Apr 2025ITF Osaka, JapanW35 Hard Janice Tjen Momoko Kobori Ayano Shimizu 4–6, 5–7Loss 5–7 May 2025ITF Daegu, South KoreaW15 Hard Kim Da-bin Back Da-yeon Lee Eun-hye 1–6, 1–6Win 6–7 Jun 2025ITF Taipei, TaiwanW35 Hard Eri Shimizu Park So-hyun Ayano Shimizu 6–4, 2–6, [10–5]Win 7–7 Jul 2025ITF Monastir, TunisiaW35 Hard Back Da-yeon Sakura Hosogi Misaki Matsuda 6–3, 6–3
References
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