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Sun Ziyue (; ; born 6 July 1996 in Nanjing) is a Chinese former professional tennis player.
In her career, Sun won two doubles titles on the ITF Circuit. On 10 February 2020, she reached her best singles ranking of world No. 337. On 18 August 2014, she peaked at No. 383 in the WTA doubles rankings.
At the 2013 Asian Youth Games, Sun won both the girls' singles and mixed-doubles titles.
Partnering Xu Shilin, Sun won her first $50k title at the ITF event in Sanya, defeating Yang Zhaoxuan and Zhao Yijing in the 2013 final.
| {class=wikitable style=font-size:85% !Legend |
| $25,000 tournaments |
| $15,000 tournaments |
| Hard (0–1) |
| Clay (0–0) |
| Loss | 0–1 | Jun 2019 | ITF Hengyang, China | 25,000 | Hard | Wang Xinyu | 4–6, 3–6 |
| {class=wikitable style=font-size:85% !Legend |
| $50,000 tournaments |
| $15,000 tournaments |
| Hard (2–2) |
| Clay (0–0) |
| Win | 1–0 | Sep 2013 | ITF Sanya, China | Hard | Xu Shilin | Yang Zhaoxuan Zhao Yijing | 6–7(5), 6–3, 10–3 |
| Loss | 1–1 | Mar 2014 | Blossom Cup, China | Hard | Xu Shilin | Chan Chin-wei Xu Yifan | 6–7(4), 1–6 |
| Win | 2–1 | Mar 2017 | ITF Nanjing, China | Hard | Sun Xuliu | Angelina Gabueva Olga Puchkova | 6–3, 6–1 |
| Loss | 2–2 | Mar 2018 | ITF Xiamen, China | Hard | Sun Xuliu | Sarah-Rebecca Sekulic Xu Shilin | 1–6, 5–7 |
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