Vera Zvonareva was the defending champion, but chose not to participate this year.
Alisa Kleybanova was the defending champion, but she lost to Michaëlla Krajicek in the second round.
Jan Abaza and Louisa Chirico were the defending champions, having won the event in 2013, but Chirico chose not to participate. Abaza partnered with Sanaz Marand, but lost in the final to Asia Muhammad and Taylor Townsend, 6–2, 6–1.
Renata Voráčová and Barbora Záhlavová-Strýcová were the defending champions, having won the event in 2013, but both players chose not to participate.
Naomi Broady and Storm Sanders were the defending champions, having won the event in 2013, but Broady chose not to participate. Sanders partnered with Daria Gavrilova and successfully defended her title, defeating Maria Sanchez and Zoë Gwen Scandalis in the final, 6–2, 6–1.
Lucie Šafářová was the defending champion, but decided not to participate this year.
Sanaz Marand and Florencia Molinero were the defending champions, but both players chose not to participate.
Jamie Loeb and Sanaz Marand were the defending champions, but both players chose to compete with different partners. Loeb partnered Catherine Bellis, but lost in the first round. Marand partnered Melanie Oudin, but lost in the quarterfinals.
Paula Cristina Gonçalves and Sanaz Marand were the defending champions, but chose not to participate together. Gonçalves partnered Verónica Cepede Royg, while Marand partnered Melanie Oudin, but both pairs lost in the first round.
Jan Abaza and Viktorija Golubic were the defending champions, but Golubic chose not to participate. Abaza partnered Alyona Sotnikova, but they lost in the quarterfinals.
Klára Koukalová was the defending champion, but lost in second round to Michaëlla Krajicek.
Sanaz Marand and Melanie Oudin were the defending champions, but both players chose not to participate.
Michaëlla Krajicek and Maria Sanchez were the defending champions, but both players chose not to participate.
Michaëlla Krajicek and Maria Sanchez were the defending champions, but Krajicek chose not to participate. Sanchez chose to partner Jovana Jakšić, but they lost in the first round to Sabrina Santamaria and Carol Zhao.
Michaëlla Krajicek and Taylor Townsend were the defending champions, but Krajicek chose not to participate. Townsend plays alongside Jessica Pegula, but they withdrew before their quarterfinal match.
Risa Ozaki was the defending champion, but chose to participate in Toronto instead.
Risa Ozaki was the defending champion, but chose to compete in Tokyo instead.
Jovana Jakšić and Catalina Pella were the defending champions, but decided not to participate.
Priscilla Hon and Vera Lapko were the defending champions, but both players chose not to participate.
Usue Maitane Arconada and Sofia Kenin were the defending champions, but chose not to participate this year.
Michaëlla Krajicek 
Olivia Rogowska 
Samantha Crawford 
