Ku Yeon-woo

Country (sports)	South Korea
Born	(2003-03-15) 15 March 2003 (age 22)
Plays	Right-handed
Prize money	$125,398
Singles
Career record	219–112
Career titles	7 ITF
Highest ranking	No. 187 (12 January 2026)
Current ranking	No. 187 (12 January 2026)
Grand Slam singles results
Australian Open	Q1 (2026)
Doubles
Career record	77–51
Career titles	7 ITF
Highest ranking	No. 372 (6 October 2025)
Current ranking	No. 395 (12 January 2026)
Last updated on: 12 January 2026.

Ku Yeon-woo (born 15 March 2003) is a South Korean tennis player. She has a career-high singles ranking of world No. 195, achieved on 1 December 2025, and a best doubles ranking of No. 372, reached on 6 October 2025, by the WTA.^[1] She is the current No. 1 Korean singles player.

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.^[2]

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.^[3]

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Win	1–0	Aug 2019	ITF Yeongwol, South Korea	W15	Hard	Watsachol Sawatdee	3–6, 6–3, 6–2
Win	2–0	Oct 2021	ITF Sozopol, Bulgaria	W15	Hard	Julia Terziyska	6–4, 6–2
Win	3–0	Nov 2021	ITF Lousada, Portugal	W15	Hard (i)	Živa Falkner	6–0, 7–5
Loss	3–1	Feb 2024	ITF Gurugram, India	W35	Hard	Justina Mikulskytė	0–6, 1–6
Loss	3–2	Mar 2024	ITF Nagpur, India	W35	Clay	Dalila Jakupović	1–6, 2–6
Loss	3–3	Mar 2025	ITF Kashiwa, Japan	W15	Hard	Ayano Shimizu	3–6, 3–6
Win	4–3	Jun 2025	ITF Taipei, Taiwan	W35	Hard	Rina Saigo	6–1, 6–4
Loss	4–4	Jul 2025	ITF Monastir, Tunisia	W35	Hard	Sakura Hosogi	3–6, 3–6
Win	5–4	Sep 2025	ITF Nakhon Pathom, Thailand	W35	Hard	Anchisa Chanta	6–4, 2–0 ret.
Win	6–4	Oct 2025	ITF Lagos, Portugal	W35	Hard	Carolyn Ansari	6–2, 4–6, 7–6(5)
Win	7–4	Oct 2025	ITF Loulé, Portugal	W35	Hard	Hibah Shaikh	7–6(6), 6–3
Loss	7–5	Nov 2025	Takasaki Open, Japan	W100	Hard	Himeno Sakatsume	3–6, 6–1, 4–6
Loss	7–6	Nov 2025	Keio Challenger, Japan	W50	Hard	Zhang Shuai	3–6, 2–6

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Loss	0–1	Mar 2021	ITF Sharm El Sheikh, Egypt	W15	Hard	Raphaëlle Lacasse	Alicia Barnett Lily Miyazaki	4–6, 1–6
Win	1–1	Aug 2021	ITF Bad Waltersdorf, Austria	W15	Clay	Priska Madelyn Nugroho	Giulia Crescenzi Arianna Zucchini	6–4, 6–3
Loss	1–2	Aug 2021	ITF Aix-en-Provence, France	W15	Clay	Maria Bondarenko	Julie Belgraver Léa Tholey	1–6, 2–6
Win	2–2	Sep 2021	ITF Melilla, Spain	W15	Clay	Caijsa Hennemann	Luisa Meyer auf der Heide Chantal Sauvant	6–3, 6–0
Win	3–2	Oct 2021	ITF Seville, Spain	W25	Clay	Caijsa Hennemann	Lina Gjorcheska Tena Lukas	7–5, 6–1
Loss	3–3	Oct 2022	ITF Quinta da Lago, Portugal	W25	Clay	Adrienn Nagy	Francisca Jorge Matilde Jorge	4–6, 4–6
Win	4–3	May 2023	ITF Incheon, South Korea	W25	Hard	Choi Ji-hee	Li Yu-yun Tang Qianhui	6–1, 6–1
Loss	4–4	Jul 2023	Open Castilla y León, Spain	W25	Hard	Diāna Marcinkēviča	Rasheeda McAdoo Alexandra Osborne	4–6, 3–6
Loss	4–5	Mar 2024	ITF Nagpur, India	W35	Clay	Justina Mikulskytė	Irina Bara Dalila Jakupović	7–6(8), 6–7(5), [7–10]
Win	5–5	Mar 2025	ITF Kashiwa, Japan	W15	Hard	Naho Sato	Eri Shimizu Kisa Yoshioka	6–2, 6–4
Loss	5–6	Apr 2025	ITF Osaka, Japan	W35	Hard	Janice Tjen	Momoko Kobori Ayano Shimizu	4–6, 5–7
Loss	5–7	May 2025	ITF Daegu, South Korea	W15	Hard	Kim Da-bin	Back Da-yeon Lee Eun-hye	1–6, 1–6
Win	6–7	Jun 2025	ITF Taipei, Taiwan	W35	Hard	Eri Shimizu	Park So-hyun Ayano Shimizu	6–4, 2–6, [10–5]
Win	7–7	Jul 2025	ITF Monastir, Tunisia	W35	Hard	Back Da-yeon	Sakura Hosogi Misaki Matsuda	6–3, 6–3

• Ku Yeon-woo at the Women's Tennis Association
• Ku Yeon-woo at the International Tennis Federation