Anna-Lena Friedsam is the defending champion, but decided not to participate this year.
Zhang Yuxuan was the defending champion, but lost in the first round to Shuko Aoyama.
Chang Kai-chen and Zheng Saisai were the defending champions, but Zheng chose not to participate this year. Chang played alongside Duan Yingying, but lost in the first round to Nicha Lertpitaksinchai and Peangtarn Plipuech.
Kristýna Plíšková was the defending champion, but chose not to participate.
Monica Niculescu was the defending champion, but lost in the first round to Pauline Parmentier.
Yaroslava Shvedova was the defending champion from 2015, when the event was last held, but did not participate this year due to injury.
Liang Chen and Wang Yafan were the defending champions when the event was previously held in 2015, however, Liang chose not to participate. Wang successfully defended her title alongside Duan Yingying, defeating Dalila Jakupović and Irina Khromacheva 6–3, 6–3 in the final.
Evgeniya Rodina was the defending champion, but lost in the first round to Eri Hozumi.
This was the first edition of the tournament.
This was the first edition of the tournament.
The 2018 Zhengzhou Women's Tennis Open was a professional tennis tournament played on outdoor hard courts. It was the fifth edition of the tournament and part of the 2018 WTA 125K series, offering a total of $125,000 in prize money. It took place in Zhengzhou, China, on 16–22 April 2018.
Wang Qiang was the defending champion, but chose not to participate.
Zheng Saisai was the defending champion, and successfully defended her title, defeating Liu Fangzhou in the final, 6–3, 6–1.
Zheng Saisai was the defending champion but lost in the final to Irina Khromacheva 3–6, 6–4, 7–6(7–5).
This was the first edition of the tournament.
Carol Zhao was the defending champion, but lost to Ivana Jorović in the quarterfinals.
Duan Yingying and Wang Yafan were the champions the last time the event was held in 2017, but chose not to participate together. Duan partnered Kaitlyn Christian, but they lost in the first round to Mona Barthel and Sara Sorribes Tormo.
Rika Fujiwara and Yuki Naito were the defending champions, but Fujiwara chose not to participate. Naito partnered Erina Hayashi but lost in the first round to Choi Ji-hee and Han Na-lae.
Duan Yingying and Wang Yafan were the defending champions, but Wang chose to compete in Nanchang instead. Duan played alongside Zheng Saisai, but lost in the first round to Lesley Pattinama Kerkhove and Bibiane Schoofs.
Caroline Garcia was the defending champion, but lost in the second round to Wang Yafan.
Duan Yingying 
Naomi Broady 
Yanina Wickmayer 
