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Yeonwoo Ku

TennisWTARight-handed

Yeonwoo Ku

South KoreaAge and results

Yeonwoo Ku is a tennis player on the WTA Tour who reached a career-high ranking of No. 165 on October 26, 2026.

4 WTA Tour matches

Updated

2026 record1-1Career highNo. 165Oct 26, 2026

About Yeonwoo Ku

Born on March 15, 2003, in Seoul, South Korea, Yeonwoo Ku plays right-handed and played her first season as a professional in 2017. On October 26, 2026, she reached a career-high WTA Tour ranking of No. 165.

Agatha Research DeskUpdated Nov 9, 2026

Match history4

Every WTA Tour, Grand Slam and Olympic main-draw match in our records, newest first. A walkover is listed but never counted in a record.

2026: 6-8

DateTournamentRoundOpponentResultScoreSurface
Sep 24Korea OpenRound 2Elena-Gabriela RuseL6-2, 6-7(1), 1-6Hard
Sep 22Korea OpenRound 1Alevtina IbragimovaW6-3, 6-2Hard
Aug 26US OpenQualifying 2nd RoundStorm HunterL6-4, 6-7(6), 0-6Hard
Aug 25US OpenQualifying 1st RoundAstra SharmaW6-4, 6-3Hard
Jul 29Odlum Brown VanOpenRound 1Emma Si Yu DongL6-4, 2-6, 6-7(6)Hard
Jun 23WimbledonQualifying 1st RoundTeodora KostovicL1-6, 4-6Grass
Jun 20Figueira Da Foz Ladies OpenSemifinalDarja VidmanovaL4-6, 3-6Hard
Jun 19Figueira Da Foz Ladies OpenQuarterfinalMartyna KubkaW3-6, 6-4, 6-1Hard
Jun 17Figueira Da Foz Ladies OpenRound 2Viktoria HruncakovaW6-4, 6-3Hard
Jun 16Figueira Da Foz Ladies OpenRound 1Lucrezia StefaniniW6-4, 7-5Hard
May 19Roland GarrosQualifying 1st RoundKarolina PliskovaL6-0, 3-6, 1-6Clay
Jan 12Australian OpenQualifying 1st RoundFiona FerroL3-6, 2-6Hard
Show 2 more
Jan 3ASB ClassicQualifying FinalKaitlin QuevedoL6-1, 4-6, 1-6Hard
Jan 2ASB ClassicQualifying 1st RoundAlina CharaevaW6-3, 6-2Hard

How she is doing nowThrough Sep 24

2026 record1-1hard 1-1
Last 105-5LWLWLLLWWWNewest first. Lost her last match.

Career

  1. 2023First WTA matchLost to Claire Liu, Korea Open
  2. 2026Career high No. 165Oct 26, 2026
  3. Sep 24, 2026Latest matchLost to Elena-Gabriela Ruse, Korea Open

First WTA match

Oct 8, 2023: lost to Claire Liu 3-6, 3-6Korea Open, on hard

Latest match

Sep 24, 2026: lost to Elena-Gabriela Ruse 6-2, 6-7, 1-6Korea Open, Round 2, on hard court

ITF finals

ITF: 16 singles finals, 8 won; 14 doubles finals, 7 won. From 2019 to 2026.

Singles

  1. L
    Nov 2026Runner-up at Incheon Open, South Korea (W100, hard), losing to Katie Swan 1-6, 6-0, 3-6.
  2. L
    Jul 2026Runner-up at Evansville Classic, United States (W100, hard), losing to Caroline Dolehide 6-7(3), 6-7(5).
  3. W
    Jun 2026Won the title at ITF Montemor-o-Novo, Portugal (W50, hard), beating Francisca Jorge 3-6, 6-4, 6-2.
  4. L
    Nov 2025Runner-up at Takasaki Open, Japan (W100, hard), losing to Himeno Sakatsume 3-6, 6-1, 4-6.
  5. L
    Nov 2025Runner-up at Yokohama Challenger, Japan (W50, hard), losing to Zhang Shuai 3-6, 2-6.
  6. W
    Oct 2025Won the title at ITF Lagos, Portugal (W35, hard), beating Carolyn Ansari 6-2, 4-6, 7-6(5).
  7. W
    Oct 2025Won the title at ITF Loule, Portugal (W35, hard), beating Hibah Shaikh 7-6(6), 6-3.
  8. W
    Sep 2025Won the title at ITF Nakhon Pathom, Thailand (W35, hard), beating Anchisa Chanta 6-4, 2-0 ret.
Show 8 more
  1. L
    Jul 2025Runner-up at ITF Monastir, Tunisia (W35, hard), losing to Sakura Hosogi 3-6, 3-6.
  2. W
    Jun 2025Won the title at ITF Taipei, Taiwan (W35, hard), beating Rina Saigo 6-1, 6-4.
  3. L
    Mar 2025Runner-up at ITF Kashiwa, Japan (W15, hard), losing to Ayano Shimizu 3-6, 3-6.
  4. L
    Mar 2024Runner-up at ITF Nagpur, India (W35, clay), losing to Dalila Jakupovic 1-6, 2-6.
  5. L
    Feb 2024Runner-up at ITF Gurugram, India (W35, hard), losing to Justina Mikulskyte 0-6, 1-6.
  6. W
    Nov 2021Won the title at ITF Lousada, Portugal (W15, indoor hard), beating Ziva Falkner 6-0, 7-5.
  7. W
    Oct 2021Won the title at ITF Sozopol, Bulgaria (W15, hard), beating Julia Terziyska 6-4, 6-2.
  8. W
    Aug 2019Won the title at ITF Yeongwol, South Korea (W15, hard), beating Watsachol Sawatdee 3-6, 6-3, 6-2.

Doubles

  1. W
    Jul 2025Won the title at ITF Monastir, Tunisia (W35, hard) with Back Da-yeon, beating Sakura Hosogi and Misaki Matsuda 6-3, 6-3.
  2. W
    Jun 2025Won the title at ITF Taipei, Taiwan (W35, hard) with Eri Shimizu, beating Park So-hyun and Ayano Shimizu 6-4, 2-6, [10-5].
  3. L
    May 2025Runner-up at ITF Daegu, South Korea (W15, hard) with Kim Da-bin, losing to Back Da-yeon and Lee Eun-hye 1-6, 1-6.
  4. L
    Apr 2025Runner-up at ITF Osaka, Japan (W35, hard) with Janice Tjen, losing to Momoko Kobori and Ayano Shimizu 4-6, 5-7.
  5. W
    Mar 2025Won the title at ITF Kashiwa, Japan (W15, hard) with Naho Sato, beating Eri Shimizu and Kisa Yoshioka 6-2, 6-4.
  6. L
    Mar 2024Runner-up at ITF Nagpur, India (W35, clay) with Justina Mikulskyte, losing to Irina Bara and Dalila Jakupovic 7-6(8), 6-7(5), [7-10].
  7. L
    Jul 2023Runner-up at Open Castilla y Leon, Spain (W25, hard) with Diana Marcinkevica, losing to Rasheeda McAdoo and Alexandra Osborne 4-6, 3-6.
  8. W
    May 2023Won the title at ITF Incheon, South Korea (W25, hard) with Choi Ji-hee, beating Li Yu-yun and Tang Qianhui 6-1, 6-1.
Show 6 more
  1. L
    Oct 2022Runner-up at ITF Quinta da Lago, Portugal (W25, clay) with Adrienn Nagy, losing to Francisca Jorge and Matilde Jorge 4-6, 4-6.
  2. W
    Oct 2021Won the title at ITF Seville, Spain (W25, clay) with Caijsa Hennemann, beating Lina Gjorcheska and Tena Lukas 7-5, 6-1.
  3. W
    Sep 2021Won the title at ITF Melilla, Spain (W15, clay) with Caijsa Hennemann, beating Luisa Meyer auf der Heide and Chantal Sauvant 6-3, 6-0.
  4. L
    Aug 2021Runner-up at ITF Aix-en-Provence, France (W15, clay) with Maria Bondarenko, losing to Julie Belgraver and Lea Tholey 1-6, 2-6.
  5. W
    Aug 2021Won the title at ITF Bad Waltersdorf, Austria (W15, clay) with Priska Madelyn Nugroho, beating Giulia Crescenzi and Arianna Zucchini 6-4, 6-3.
  6. L
    Mar 2021Runner-up at ITF Sharm El Sheikh, Egypt (W15, hard) with Raphaelle Lacasse, losing to Alicia Barnett and Lily Miyazaki 4-6, 1-6.

Sources and updates

Results and schedules come from Agatha's own records of the WTA Tour.

Updated Nov 12, 2026, 7:15 AM ET. Results and form refresh after every match; biography facts are checked weekly.