Eugenie Bouchard was the defending champion, having won the event in 2012, but she chose not to defend her title.
Sharon Fichman and Marie-Ève Pelletier were the defending champions, having won the event in 2012, but both players chose not to defend their title.
Karolína Plíšková was the defending champion, but lost in the semifinals to Dominika Cibulková.
Ons Jabeur was the defending champion, having won the event in 2013, but chose not to participate.
Daniel Nestor and Kristina Mladenovic were the defending champions, but lost in the semifinals to Max Mirnyi and Chan Hao-ching.
Lucie Šafářová was the defending champion, but decided not to participate this year.
Ysaline Bonaventure and Nicola Slater were the defending champions, but decided not to participate this year.
Jelena Janković was the defending champion, but lost in the semifinals to Caroline Wozniacki.
Akiko Omae and Peangtarn Plipuech were the defending champions, but Plipuech chose to participate in Taipei instead. Omae partnered Ksenia Lykina and successfully defended her title. Omae and Lykina won the title, defeating Rika Fujiwara and Ayaka Okuno in the final, 6–7(4–7), 6–2, [10–5].
The 2017 Kunming Open was a professional tennis tournament played on outdoor clay courts. It was the sixth (ATP) and fourth (ITF) editions of the tournament and part of the 2017 ATP Challenger Tour and the 2017 ITF Women's Circuit, offering $150,000+H (ATP) and $100,000+H (ITF) in prize money. It took place in Anning, China, from 24–30 April 2017.
This was the first edition of this event.
Ellen Perez and Carol Zhao were the defending champions, but Zhao chose not to participate.
Bethanie Mattek-Sands and Jamie Murray were the defending champions and successfully defended their title, defeating Chan Hao-ching and Michael Venus in the final, 6–2, 6–3. This is the third straight Mixed Doubles title Murray has won at the US Open, following his championships in 2018 and 2017.
Monique Adamczak and Jessica Moore were the defending champions, but Adamczak chose to compete in Osaka instead. Moore played alongside Dalila Jakupović, but lost in the first round to Alexa Guarachi and Giuliana Olmos.
Tara Moore and Conny Perrin were the defending champions, but Perrin chose not to participate. Moore partnered Emina Bektas, but lost to Samantha Murray and Bibiane Schoofs in the semifinals.
Giulia Gatto-Monticone and Anastasia Grymalska were the defending champions but chose not to participate.
Barbora Krejčíková and Rajeev Ram were the defending champions, but Ram chose not to participate. Krejčíková played alongside Nikola Mektić, and successfully defended the title, defeating Bethanie Mattek-Sands and Jamie Murray in the final 5–7, 6–4, [10–1].
Eri Hozumi and Moyuka Uchijima were the defending champions but chose to participate with different partners. Hozumi partnered Mana Ayukawa, but lost in the first round to Wu Fang-hsien and Zhang Ying.
Victoria Rodríguez and Ana Sofía Sánchez were the defending champions but chose not to participate.
Akgul Amanmuradova and Ekaterine Gorgodze were the defending champions but chose not to participate.
Bianca Andreescu 
Mana Ayukawa 
Samantha Murray 
