Lu Jingjing was the defending champion, but lost to the 3rd seeded Tetiana Luzhanska in the first round.
Jelena Dokić was the defending champion, but lost in the second round to compatriot Olivia Rogowska.
Daniela Hantuchová was the two-time defending champion but retired against Nina Bratchikova in the second round.
Maria Kirilenko became the new champion after defeating Sabine Lisicki 5–7, 6–1, 7–6(7–1) in the final.
Hsieh Su-wei was the defending champion, having won the event in 2012, but decided not to participate in 2013.
Hsieh Su-wei was the defending champion, but decided not to participate.
Andrea Hlaváčková and Lucie Hradecká are the defending champions, but Hradecká decided not to participate.
Sara Errani and Roberta Vinci were the defending champions, but lost in the semifinals to Květa Peschke and Katarina Srebotnik.
Hsieh Su-wei and Peng Shuai won the title, defeating Peschke and Srebotnik in the final, 6–4, 6–0. By winning her second round match, Peng replaced Errani and Vinci as the world No. 1 in doubles.
Hsieh Su-wei and Peng Shuai were the defending champions, but lost in the second round to Anastasia Pavlyuchenkova and Lucie Šafářová.
Raquel Kops-Jones and Abigail Spears won the title, defeating Tímea Babos and Kristina Mladenovic in the final, 6–1, 2–0, ret.
Peng Shuai was the defending champion, but chose not to participate.
Anna-Lena Friedsam is the defending champion, but decided not to participate this year.
Zhang Shuai was the defending champion of 2013, as this tournament was not held in 2014, however she lost in the second round to Tian Ran.
This was the first edition of the tournament.
Dominika Cibulková was the defending champion, but lost in the second round to Heather Watson.
Caroline Wozniacki was the defending champion and successfully defended her title, defeating Anastasia Pavlyuchenkova in the final, 6–0, 7–5.
Yaroslava Shvedova was the defending champion from 2015, when the event was last held, but did not participate this year due to injury.
Karolína Plíšková was the defending champion, but lost in the third round to Catherine Bellis.
Elena Vesnina was the defending champion, but lost in the third round to Angelique Kerber.
Zarina Diyas was the defending champion, but lost in the quarterfinals to Zhang Shuai.
Belinda Bencic was the champion the last time the event was held in 2017, but chose to compete in St. Petersburg instead.
Chan Hao-ching and Yang Zhaoxuan were the defending champions, but chose to participate with different partners. Chan played alongside her sister Latisha, but they lost in the semifinals to Hsieh Su-wei and Barbora Strýcová. Yang partnered Abigail Spears, but lost in the first round to Eugenie Bouchard and Sofia Kenin.
