Back Da-yeon

Back Da-yeon
Country (sports) South Korea
Born (2002-01-24) 24 January 2002 (age 24)
Daejeon, South Korea
Height173 cm (5 ft 8 in)
Turned pro2017
PlaysRight-handed
Prize money$147,340
Singles
Career record235–102
Career titles12 ITF
Highest rankingNo. 245 (27 July 2026)
Current rankingNo. 261 (28 September 2026)
Doubles
Career record135–83
Career titles15 ITF
Highest rankingNo. 234 (25 May 2026)
Current rankingNo. 234 (25 May 2026)
Medal record
Women's tennis
Representing  South Korea
Asian Games
Bronze medal – third place2022 HangzhouDoubles
Last updated on: 28 July 2026.

Back Da-yeon (born 24 January 2002) is a Korean tennis player. She has a career-high singles ranking of 245 by the WTA, achieved on 27 July 2026, and a best doubles ranking of No. 234, reached on 20 July 2026. She has won twelve singles titles and 15 doubles titles on the ITF Circuit.

Career

Back made her WTA Tour debut at the 2022 Korea Open, after qualifying for the singles main draw. She lost in the first round to fellow South Korean player Han Na-lae.

She was a winner of the Heart Award in the 2023 Billie Jean King Cup.

Ranked No. 569, she received a wildcard from the 2023 Korea Open and upset second seed Jelena Ostapenko in the champion's tie-break having fought back from match point down earlier in the third set. before losing in the next round to Kimberly Birrell.

Given a wildcard for the newly upgraded WTA 500 Korea Open in 2024, she tried to defend her success of the previous year, but went out in the first round, in straight sets to qualifier Carol Zhao.

ITF Circuit finals

Singles: 21 (12 titles, 9 runner-ups)

Legend
W50 tournaments (0–1)
W35 tournaments (5–2)
W15 tournaments (7–6)
Finals by surface
Hard (12–7)
Clay (0–1)
Carpet (0–1)
Result W–L Date Tournament Tier Surface Opponent Score
Loss 0–1 Sep 2019 ITF Yeongwol, South Korea W15 Hard South Korea Choi Ji-hee 7–5, 3–6, 2–6
Win 1–1 Sep 2022 ITF Yeongwol, South Korea W15 Hard South Korea Kim Da-bin 7–6(2), 3–0 ret.
Loss 1–2 Jul 2023 ITF Nakhon, Thailand W15 Hard Thailand Lanlana Tararudee 4–6, 4–6
Win 2–2 Aug 2023 ITF Sapporo, Japan W15 Hard Japan Miho Kuramochi 6–2, 6–0
Win 3–2 Sep 2023 ITF Yeongwol, South Korea W15 Hard United States Dasha Ivanova 6–3, 6–0
Loss 3–3 Sep 2023 ITF Yeongwol, South Korea W15 Hard South Korea Kim Da-bin 2–6, 1–6
Loss 3–4 May 2024 ITF Monastir, Tunisia W15 Hard Mariia Tkacheva 4–6, 3–6
Win 4–4 May 2024 ITF Monastir, Tunisia W15 Hard Slovakia Katarína Kužmová 6–3, 6–0
Win 5–4 Jun 2024 ITF Daegu, South Korea W35 Hard Japan Eri Shimizu 4–6, 6–2, 6–3
Win 6–4 Sep 2024 ITF Yeongwol, South Korea W15 Hard South Korea Lee Eun-hye 6–2, 6–1
Win 7–4 Sep 2024 ITF Yeongwol, South Korea W15 Hard South Korea Jeong Bo-young 6–1, 6–2
Loss 7–5 Mar 2025 ITF Nonthaburi, Thailand W35 Hard South Korea Lee Eun-hye 3–6, 4–6
Loss 7–6 Mar 2025 ITF Nonthaburi, Thailand W15 Hard Thailand Anchisa Chanta 6–7((3), 3–6
Win 8–6 May 2025 ITF Daegu, South Korea W15 Hard South Korea Lee Eun-hye 5–6 ret.
Win 9–6 Jul 2025 ITF Monastir, Tunisia W35 Hard Italy Arianna Zucchini 6–7(4), 6–2, 7–6(7)
Loss 9–7 Oct 2025 ITF Makinohara, Japan W35 Carpet Japan Sara Saito 1–6, 2–6
Loss 9–8 Apr 2026 ITF Singapore, Singapore W15 Hard (i) Japan Rinko Matsuda 6–7(4), 2–6
Win 10–8 May 2026 ITF Andong, South Korea W35 Hard South Korea Jeong Bo-young 3–6, 6–2, 6–0
Win 11–8 May 2026 ITF Changwon, South Korea W35 Hard South Korea Lee Ha-eum 6–1, 6–2
Win 12–8 Jun 2026 ITF Taipei, Chinese Taipei W35 Hard Japan Haruka Kaji 6–1, 7–5
Loss 12–9 Jul 2026 ITF Horb, Germany W50 Clay Sweden Lea Nilsson 6–7(3), 2–6

Doubles: 26 (15 titles, 11 runner-ups)

Legend
W75 tournaments (0–1)
W50 tournaments (0–1)
W35 tournaments (8–1)
W15 tournaments (7–8)
Finals by surface
Hard (13–9)
Clay (2–2)
Result W–L Date Tournament Tier Surface Partner Opponents Score
Win 1–0 Oct 2021 ITF Antalya, Turkey W15 Clay China Tian Fangran Turkey Doğa Türkmen
Turkey Melis Ayda Uyar		 7–6(5), 6–1
Loss 1–1 Nov 2021 ITF Antalya, Turkey W15 Clay China Tian Fangran Russia Ksenia Laskutova
Russia Aleksandra Pospelova		 6–2, 2–6, [6–10]
Win 2–1 Nov 2021 ITF Antalya, Turkey W15 Clay China Tian Fangran Russia Anna Chekanskaya
Georgia (country) Zoziya Kardava		 7–5, 6–3
Loss 2–2 Jul 2022 ITF Monastir, Tunisia W15 Hard South Korea Jeong Bo-young Indonesia Priska Madelyn Nugroho
China Wei Sijia		 4–6, 1–6
Win 3–2 Sep 2022 ITF Yeongwol, South Korea W15 Hard South Korea Lee Eun-hye Japan Junri Namigata
Japan Riko Sawayanagi		 7–5, 3–6, [13–11]
Loss 3–3 Sep 2022 ITF Yeongwol, South Korea W15 Hard South Korea Lee Eun-hye South Korea Kim Da-bin
South Korea Lee So-ra		 4–6, 6–3, [10–12]
Loss 3–4 Mar 2023 ITF Sharm El Sheikh, Egypt W15 Hard South Korea Jeong Bo-young Russia Polina Iatcenko
Egypt Sandra Samir		 4–6, 5–7
Loss 3–5 Aug 2023 ITF Sapporo, Japan W15 Hard South Korea Jeong Bo-young Japan Mushika Mao
Japan Himari Satō		 3–6, 4–6
Loss 3–6 Aug 2023 ITF Sapporo, Japan W15 Hard South Korea Jeong Bo-young Japan Nana Kawagishi
Japan Kisa Yoshioka		 3–6, 3–6
Loss 3–7 Sep 2023 ITF Yeongwol, South Korea W15 Hard South Korea Jeong Bo-young South Korea Kim Da-bin
South Korea Kim Na-ri		 2–6, 3–6
Win 4–7 May 2024 ITF Monastir, Tunisia W15 Hard Colombia María Herazo González Japan Natsuho Arakawa
China Zhang Ying		 6–4, 6–4
Loss 4–8 Jul 2024 ITF Ust-Kamenogorsk, Kazakhstan W15 Hard Japan Ayumi Koshiishi Russia Aglaya Fedorova
Daria Khomutsianskaya		 6–7(4), 2–6
Win 5–8 Aug 2024 ITF Ust-Kamenogorsk, Kazakhstan W15 Hard Russia Anastasia Sukhotina Russia Varvara Panshina
Uzbekistan Daria Shubina		 6–3, 6–1
Win 6–8 Sep 2024 ITF Yeongwol, South Korea W15 Hard South Korea Lee Eun-hye South Korea Kim Na-ri
China Ye Qiuyu		 6–1, 6–1
Win 7–8 Feb 2025 ITF Timaru, New Zealand W35 Hard South Korea Lee Eun-hye South Korea Choi On-yu
Japan Nanari Katsumi		 7–5, 6–3
Win 8–8 May 2025 ITF Andong, South Korea W35 Hard South Korea Lee Eun-hye South Korea Han Hyeong-ju
South Korea Kim Eun-chae		 3–6, 6–2, [10–4]
Win 9–8 May 2025 ITF Daegu, South Korea W15 Hard South Korea Lee Eun-hye South Korea Kim Da-bin
South Korea Ku Yeon-woo		 6–1, 6–1
Win 10–8 Jul 2025 ITF Monastir, Tunisia W35 Hard South Korea Ku Yeon-woo Japan Sakura Hosogi
Japan Misaki Matsuda		 6–3, 6–3
Loss 10–9 Jul 2025 ITF Monastir, Tunisia W35 Hard India Vaidehi Chaudhari Australia Tenika McGiffin
Latvia Elza Tomase		 6–3, 3–6, [8–10]
Loss 10–10 Nov 2025 ITF Playford, Australia W75 Hard South Korea Lee Eun-hye Australia Talia Gibson
Australia Maddison Inglis		 2–6, 0–6
Win 11–10 Feb 2026 ITF Monastir, Tunisia W35 Hard Greece Sapfo Sakellaridi Russia Alina Yuneva
Russia Daria Egorova		 6–3, 6–2
Win 12–10 Apr 2026 ITF Goyang, South Korea W35 Hard United States Jaeda Daniel South Korea Kim Da-bin
South Korea Park So-hyun		 6–4, 6–0
Win 13–10 May 2026 ITF Changwon, South Korea W35 Hard China Guo Meiqi United States Hanna Chang
South Korea Jang Ga-eul		 7–5, 7–5
Win 14–10 May 2026 ITF Andong, South Korea W35 Hard South Korea Jang Su-jeong South Korea Jeong Bo-young
South Korea Park So-hyun		 6–4, 6–3
Win 15–10 Jun 2026 ITF Taipei, Chinese Taipei W35 Hard Chinese Taipei Tsao Chia-yi Japan Natsumi Kawaguchi
Japan Ayano Shimizu		 7–5, 6–1
Loss 15–11 Jul 2026 ITF Horb, Germany W50 Clay South Korea Park So-hyun Greece Sapfo Sakellaridi

France Lucie Nguyen Tan

 2–6, 6–2, [7–10]

Billie Jean King Cup participation

Singles (10–3)

Edition Round Location Date Against Opponent W/L Score
2023 BJK Cup Asia/Oceania Zone Uzbekistan Tashkent, Uzbekistan 12 April 2023 China China China Wushuang Zheng W 6–3, 6–4
14 April 2023 Uzbekistan Uzbekistan Uzbekistan Sevil Yuldasheva W 6–2, 6–3
2024 Billie Jean King Cup play-offs Kazakhstan Zarina Diyas L 6–3, 3–6,(1)6–7
2024 BJK Cup Kazakhstan Astana, Kazakhstan 9 February 2024 Kazakhstan Kazakhstan
2025 BJK Cup Asia/Oceania Zone India Pune, India 8 April 2025 Chinese Taipei Chinese Taipei Chinese Taipei Joanna Garland W 6–4, 2–6, 6–4
9 April 2026 New Zealand New Zealand New Zealand Lulu Sun L 4–6, 1–6
10 April 2026 Thailand Thailand Thailand Mananchaya Sawangkaew L 4–6, 2–6
11 April 2026 Hong Kong Hong Kong Hong Kong Cody Wong W 6–3, 7–5
12 April 2026 India India India Sahaja Yamalapalli W 6–3, 6–4
2026 BJK Cup Asia/Oceania Zone India New Delhi, India 7 April 2026 Mongolia Mongolia Mongolia Khongorzul Aldarkhishig W 6–0, 6–0
8 April 2026 Thailand Thailand Thailand Anchisa Chanta W 6–3, 6–4
9 April 2026 New Zealand New Zealand New Zealand Valentina Ivanov W 7–5, 6–3
10 April 2026 Indonesia Indonesia Indonesia Priska Madelyn Nugroho W 7–5, 3–6, 6–2
11 April 2026 India India India Ankita Raina W 6–1, 7–5

Top 5 highest rank wins

# Tournament Category Start date Surface Rd Opponent Rank Score PSR
1 Korea Open, South Korea WTA 250 9 October 2023 Hard 1R Latvia Jeļena Ostapenko No. 13 3–6, 6–1, 7–6(4) No. 569
2 Korea Open, South Korea WTA 250 19 September 2022 Hard Q1 Israel Lina Glushko No. 218 7–5, 1–6, 6–1 No. 679
3 Incheon Open, South Korea ITF W100 2 September 2024 Hard 1R China Ma Yexin No. 223 6–4, 6–3 No. 344
4 Gold Coast Tennis International, Australia ITF W60 27 November 2023 Hard 1R Australia Seone Mendez No. 234 6–3, 6–3 No. 480
5 ITF Andong, South Korea ITF W35 16 May 2026 Hard SF Sofya Lansere No. 268 6–3, 6–1 No. 332

References

  1. ↑ "Dayeon Back | Player Stats & More – WTA Official". Women's Tennis Association.
  2. ↑ "Jang Su-jeong out of Korea Open; Han Na-lae advances". Korea JoongAng Daily. 19 September 2022. Retrieved 16 September 2024.
  3. ↑ "Fernandez, Back, Peterson and Riera named Heart Award winners". Billie Jean King Cup. May 23, 2023. Retrieved 10 October 2023.
  4. ↑ "Back upsets Ostapenko, Jang knocks out Kenin in Seoul". Women's Tennis Association. Retrieved 2023-11-23.
  5. ↑ "Korea Open: Dayeon Back stuns Jelena Ostapenko in huge shock, Jessica Pegula cruises past Viktoria Hruncakova". Eurosport. Retrieved 16 September 2024.
  6. ↑ "Jelena Ostapenko ousted by 569th-ranked Back Dayeon at Hana Bank Korea Open". Tennis.com. Retrieved 16 September 2024.
  7. ↑ "Birrell enjoying career-best run at WTA tournament in Seoul". Tennis Australia. Retrieved 16 September 2024.
  8. ↑ "Korea Open: Zhao through to second round". Tennis Majors. 16 September 2024. Retrieved 16 September 2024.