Duan Yingying (; born 3 July 1989) is a former Chinese tennis player.
In her career, she won one singles title and three doubles titles on the WTA Tour, and two WTA Challenger doubles titles, as well as eleven singles and three doubles titles on the ITF Women's Circuit. Her nickname is lightning for her amazing forehand.
On 24 April 2017, she reached her career-high singles ranking of world No. 60. On 3 February 2020, she peaked at No. 16 in the doubles rankings.
Duan won her first ever WTA Tour doubles title at the Elite Trophy with Han Xinyun.
In September, they reached the quarterfinals of the US Open, however, they were beaten by the eventual champions, Elise Mertens and Aryna Sabalenka. The following week, with Zheng unavailable, she partnered with Veronika Kudermetova for the first time to win the doubles title at the Wuhan Open, beating Mertens and Sabalenka in the final.
| Australian Open | A | A | 1R | 1R | Q2 | 3R | 2R | Q1 | 3–4 |
| French Open | A | A | A | Q1 | A | 1R | 1R | A | 0–2 |
| Wimbledon | A | A | A | 2R | 2R | 1R | Q2 | A | 2–3 |
| US Open | Q2 | 1R | 1R | Q2 | 2R | 2R | A | A | 2–4 |
| Win–loss | 0–0 | 0–1 | 0–2 | 1–2 | 2–2 | 3–4 | 1–2 | 0–0 | 7–13 |
| Australian Open | A | A | 1R | 1R | 1R | 0–3 |
| French Open | 3R | 3R | F | A | A | 9–3 |
| Wimbledon | 1R | 1R | 3R | NH | A | 2–3 |
| US Open | A | 2R | QF | A | A | 4–2 |
| Win–loss | 2–2 | 3–3 | 10–4 | 0–1 | 0–1 | 15–11 |
| Loss | 2019 | French Open | Clay | Zheng Saisai | Tímea Babos Kristina Mladenovic | 2–6, 3–6 |
| Win | 2019 | Wuhan Open | Hard | Veronika Kudermetova | Elise Mertens Aryna Sabalenka | 7–6(7–3), 6–2 |
| Win | 2017 | Elite Trophy, Zhuhai | Hard (i) | Han Xinyun | Zhang Shuai Lu Jingjing | 6–2, 6–1 |
| Loss | 2019 | Elite Trophy, Zhuhai | Hard (i) | Yang Zhaoxuan | Lyudmyla Kichenok Andreja Klepač | 3–6, 3–6 |
| {class="wikitable" style=font-size:90% !Legend |
| Grand Slam |
| WTA 1000 / Premier 5 |
| WTA 500 / Premier |
| WTA 250 / International (1–0) |
| Hard (1–0) |
| Clay |
| Grass |
| Outdoor (1–0) |
| Indoor |
| Win | Jiangxi Open, China | International | Hard | Vania King | 1–6, 6–4, 6–2 |
| {class="wikitable" style=font-size:90% !Legend |
| Grand Slam (0–1) |
| WTA Elite Trophy (1–1) |
| WTA 1000 / Premier 5 (1–0) |
| WTA 500 / Premier |
| WTA 250 / International (1–3) |
| Hard (3–3) |
| Clay (0–2) |
| Grass |
| Outdoor (1–4) |
| Indoor (2–1) |
| Win | 1–0 | Zhuhai, China | Elite Trophy | Hard (i) | Han Xinyun | Lu Jingjing Zhang Shuai | 6–2, 6–1 | |
| Win | 2–0 | Taipei Open, Taiwan | International | Hard (i) | Wang Yafan | Nao Hibino Oksana Kalashnikova | 7–6(7–4), 7–6(7–5) | |
| Loss | 2–1 | Shenzhen Open, China | International | Hard | Renata Voráčová | Peng Shuai Yang Zhaoxuan | 4–6, 3–6 | |
| Loss | 2–2 | Internationaux de Strasbourg, France | International | Clay | Han Xinyun | Daria Gavrilova Ellen Perez | 4–6, 3–6 | |
| Loss | 2–3 | French Open | Grand Slam | Clay | Zheng Saisai | Tímea Babos Kristina Mladenovic | 2–6, 3–6 | |
| Win | 3–3 | Wuhan Open, China | Premier 5 | Hard | Veronika Kudermetova | Elise Mertens Aryna Sabalenka | 7–6(7–3), 6–2 | |
| Loss | 3–4 | Zhuhai, China | Elite Trophy | Hard (i) | Yang Zhaoxuan | Lyudmyla Kichenok Andreja Klepač | 3–6, 3–6 | |
| Loss | 3–5 | Shenzhen Open, China | International | Hard | Zheng Saisai | Barbora Krejčíková Kateřina Siniaková | 2–6, 6–3, 4–10 |
| Loss | Suzhou Ladies Open, China | Hard | Anna-Lena Friedsam | 1–6, 3–6 |
| Win | 1–0 | Hua Hin Challenger, Thailand | Hard | Wang Yafan | Dalila Jakupović Irina Khromacheva | 6–3, 6–3 | |
| Win | 2–0 | Zhengzhou Open, China | Hard | Wang Yafan | Naomi Broady Yanina Wickmayer | 7–6(5), 6–3 | |
| Loss | 2–1 | Kunming Open, China | Clay | Han Xinyun | Peng Shuai Yang Zhaoxuan | 5–7, 2–6 |
| $100,000 tournaments |
| $80,000 tournaments |
| $50/60,000 tournaments |
| $25,000 tournaments |
| $10,000 tournaments |
| Win | 1–0 | Feb 2009 | ITF Jiangmen, China | 10,000 | Hard | Xie Yanze | 6–2, 6–4 |
| Win | 2–0 | May 2009 | ITF New Delhi, India | 10,000 | Hard | Keren Shlomo | 6–3, 6–4 |
| Loss | 2–1 | Jun 2009 | ITF Xiamen, China | 25,000 | Hard | Zhang Shuai | 2–6, 1–6 |
| Win | 3–1 | Mar 2010 | ITF Nanjing, China | 10,000 | Hard | Liu Wanting | 6–4, 7–6(6) |
| Win | 4–1 | Jun 2010 | ITF Hefei, China | 10,000 | Hard | Zheng Saisai | 6–3, 6–4 |
| Loss | 4–2 | Aug 2010 | ITF Saitama, Japan | 10,000 | Hard | Hsu Wen-hsin | 1–6, 6–1, 3–6 |
| Loss | 4–3 | Aug 2011 | ITF Saitama, Japan | 10,000 | Hard | Ayumi Oka | 3–6, 4–6 |
| Win | 5–3 | Feb 2012 | ITF Wellington, New Zealand | 25,000 | Hard | Sandra Zaniewska | 6–1, 6–4 |
| Win | 6–3 | May 2012 | ITF Changwon, Korea | 25,000 | Hard | Zhang Ling | 6–4, 6–3 |
| Win | 7–3 | May 2012 | ITF Gimcheon, Korea | 25,000 | Hard | Chanel Simmonds | 6–2, 6–1 |
| Win | 8–3 | Jun 2012 | ITF Goyang, Korea | 25,000 | Hard | Zhang Ling | 6–3, 6–3 |
| Loss | 8–4 | Jul 2012 | ITF Evansville, United States | 10,000 | Hard | Mallory Burdette | 1–6, 2–6 |
| Loss | 8–5 | Oct 2012 | Suzhou Ladies Open, China | 100,000 | Hard | Hsieh Su-wei | 2–6, 2–6 |
| Win | 9–5 | May 2013 | ITF Goyang, Korea | 25,000 | Hard | Liu Fangzhou | 6–3, 6–4 |
| Win | 10–5 | Jun 2014 | ITF Xi'an, China | 50,000 | Hard | Zhu Lin | 4–6, 7–6(9), 6–4 |
| Win | 11–5 | Jul 2015 | ITF Tianjin, China | 25,000 | Hard | Wang Qiang | 4–6, 7–6(2), 3–0 ret. |
| Loss | 11–6 | Jul 2015 | ITF Zhengzhou, China | 25,000 | Hard | Wang Yafan | 4–6, 4–6 |
| Loss | 11–7 | Oct 2015 | Suzhou Ladies Open, China | 50,000 | Hard | Zhang Kailin | 6–1, 3–6, 4–6 |
| Loss | 11–8 | May 2019 | Jin'an Open, China | 60,000 | Hard | Han Xinyun | 4–6, 3–6 |
| Loss | 0–1 | May 2008 | ITF Khon Kaen, Thailand | 10,000 | Hard | Chen Hui | Kim Sun-jung Lee Cho-won | 4–6, 6–4, 4–10 |
| Loss | 0–2 | Feb 2012 | ITF Sydney, Australia | 25,000 | Hard | Han Xinyun | Arina Rodionova Melanie South | 6–3, 3–6, 8–10 |
| Win | 1–2 | Jul 2012 | ITF Evansville, US | 10,000 | Hard | Xu Yifan | Mallory Burdette Natalie Pluskota | 6–2, 6–3 |
| Loss | 1–3 | Jul 2016 | ITF Wuhan, China | 50,000 | Hard | Chang Kai-chen | Shuko Aoyama Makoto Ninomiya | 4–6, 4–6 |
| Win | 2–3 | May 2019 | Kangaroo Cup, Japan | 80,000 | Hard | Han Xinyun | Akiko Omae Peangtarn Plipuech | 6–3, 4–6, 10–4 |
| Win | 3–3 | Jun 2019 | Manchester Trophy, UK | 100,000 | Grass | Zhu Lin | Robin Anderson Laura Ioana Paar | 6–4, 6–3 |
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