# Back Da-yeon

Back Da-yeon (born 24 January 2002) is a Korean tennis player. Back has a career-high singles ranking of world No. 319 by the WTA, achieved on 9 September 2024 and a doubles ranking of No. 522, reached on 9 September 2024.

## 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 at the 2023 Korea Open where she received a wildcard, she upset second seed Jelena Ostapenko in a deciding 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 2024 Korea Open, she was unable to repeat her success of the previous year, going out in the first round in straight sets to qualifier Carol Zhao.

## ITF Circuit finals
### Singles: 11 (7 titles, 4 runner–ups)

* Legend
* W35 tournaments (1–0)
* W15 tournaments (6–4)
* Finals by surface
* Hard (7–4)
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Loss | 0–1 | Sep 2019 | ITF Yeongwol, South Korea | W15 | Hard | Choi Ji-hee | 7–5, 3–6, 2–6 |
| Win | 1–1 | Sep 2022 | ITF Yeongwol, South Korea | W15 | Hard | Kim Da-bin | 7–6$^{(2)}$, 3–0 ret. |
| Loss | 1–2 | Jul 2023 | ITF Nakhon, Thailand | W15 | Hard | Lanlana Tararudee | 4–6, 4–6 |
| Win | 2–2 | Aug 2023 | ITF Sapporo, Japan | W15 | Hard | Miho Kuramochi | 6–2, 6–0 |
| Win | 3–2 | Sep 2023 | ITF Yeongwol, South Korea | W15 | Hard | Dasha Ivanova | 6–3, 6–0 |
| Loss | 3–3 | Sep 2023 | ITF Yeongwol, South Korea | W15 | Hard | 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 | Katarína Kužmová | 6–3, 6–0 |
| Win | 5–4 | Jun 2024 | ITF Daegu, South Korea | W35 | Hard | Eri Shimizu | 4–6, 6–2, 6–3 |
| Win | 6–4 | Sep 2024 | ITF Yeongwol, South Korea | W15 | Hard | Lee Eun-hye | 6–2, 6–1 |
| Win | 7–4 | Sep 2024 | ITF Yeongwol, South Korea | W15 | Hard | Jeong Bo-young | 6–1, 6–2 |

### Doubles: 15 (7 titles, 8 runner–ups)

* Legend
* W35 tournaments (1–0)
* W15 tournaments (6–8)
* Finals by surface
* Hard (5–7)
* Clay (2–1)
| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
| Win | 1–0 | Oct 2021 | ITF Antalya, Turkey | W15 | Clay | Tian Fangran | Doğa Türkmen Melis Ayda Uyar | 7–6$^{(5)}$, 6–1 |
| Loss | 1–1 | Nov 2021 | ITF Antalya, Turkey | W15 | Clay | Tian Fangran | Ksenia Laskutova Aleksandra Pospelova | 6–2, 2–6, [6–10] |
| Win | 2–1 | Nov 2021 | ITF Antalya, Turkey | W15 | Clay | Tian Fangran | Anna Chekanskaya Zoziya Kardava | 7–5, 6–3 |
| Loss | 2–2 | Jul 2022 | ITF Monastir, Tunisia | W15 | Hard | Jeong Bo-young | Priska Madelyn Nugroho Wei Sijia | 4–6, 1–6 |
| Win | 3–2 | Sep 2022 | ITF Yeongwol, South Korea | W15 | Hard | Lee Eun-hye | Junri Namigata Riko Sawayanagi | 7–5, 3–6, [13–11] |
| Loss | 3–3 | Sep 2022 | ITF Yeongwol, South Korea | W15 | Hard | Lee Eun-hye | Kim Da-bin Lee So-ra | 4–6, 6–3, [10–12] |
| Loss | 3–4 | Mar 2023 | ITF Sharm El Sheikh, Egypt | W15 | Hard | Jeong Bo-young | Polina Iatcenko Sandra Samir | 4–6, 5–7 |
| Loss | 3–5 | Aug 2023 | ITF Sapporo, Japan | W15 | Hard | Jeong Bo-young | Mao Mushika Himari Sato | 3–6, 4–6 |
| Loss | 3–6 | Aug 2023 | ITF Sapporo, Japan | W15 | Hard | Jeong Bo-young | Nana Kawagishi Kisa Yoshioka | 3–6, 3–6 |
| Loss | 3–7 | Sep 2023 | ITF Yeongwol, South Korea | W15 | Hard | Jeong Bo-young | Kim Da-bin Kim Na-ri | 2–6, 3–6 |
| Win | 4–7 | May 2024 | ITF Monastir, Tunisia | W15 | Hard | María Herazo González | Natsuho Arakawa Zhang Ying | 6–4, 6–4 |
| Loss | 4–8 | Jul 2024 | ITF Ust-Kamenogorsk, Kazakhstan | W15 | Hard | Ayumi Koshiishi | Aglaya Fedorova Daria Khomutsianskaya | 6–7$^{(4)}$, 2–6 |
| Win | 5–8 | Aug 2024 | ITF Ust-Kamenogorsk, Kazakhstan | W15 | Hard | Anastasia Sukhotina | Varvara Panshina Daria Shubina | 6–3, 6–1 |
| Win | 6–8 | Sep 2024 | ITF Yeongwol, South Korea | W15 | Hard | Lee Eun-hye | Kim Na-ri Ye Qiuyu | 6–1, 6–1 |
| Win | 7–8 | Feb 2025 | ITF Timaru, New Zealand | W35 | Hard | Lee Eun-hye | Choi On-yu Nanari Katsumi | 7–5, 6–3 |

## 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 | Jeļena Ostapenko | No. 13 | 3–6, 6–1, 7–6$^{(7–4)}$ | No. 569 |
| 2 | Korea Open, South Korea | WTA 250 | 19 September 2022 | Hard | Q1 | Lina Glushko | No. 218 | 7–5, 1–6, 6–1 | No. 679 |
| 3 | Incheon Open, South Korea | ITF W100 | 2 September 2024 | Hard | 1R | Ma Yexin | No. 223 | 6–4, 6–3 | No. 344 |
| 4 | Gold Coast Tennis International, Australia | ITF W60 | 27 November 2023 | Hard | 1R | Seone Mendez | No. 234 | 6–3, 6–3 | No. 480 |
| 5 | Korea Open, South Korea | WTA 250 | 19 September 2022 | Hard | Q2 | Daniela Vismane | No. 274 | 6–2, 6–3 | No. 679 |
* statistics correct as of 22 September 2024.