Andrea Hlaváčková and Renata Voráčová were the defending champions but decided not to participate.
Petra Cetkovská and Alexandra Panova won the final over Irina-Camelia Begu and Alexandra Cadanțu, 3–6, 7–6(7–5), [11–9].
Tatjana (Malek) Maria and Kristina Mladenovic were the defending champions, but decided not to participate this year.
Darija Jurak and Megan Moulton-Levy were the defending champions, but chose not to participate this year.
Lara Arruabarrena and Caroline Garcia were the defending champions, but they both chose to participate in Fed Cup ties this year.
Paula Cristina Gonçalves and Beatriz Haddad Maia won the title, defeating Irina Falconi and Shelby Rogers in the final, 6–3, 3–6, [10–6].
Alla Kudryavtseva and Anastasia Rodionova were the defending champions, but chose not to participate.
Asia Muhammad and Laura Siegemund were the defending champions, but Siegemund chose not to participate this year. Muhammad played alongside María José Martínez Sánchez, but lost in the quarterfinals to Alexandra Panova and Amra Sadiković.
Oksana Kalashnikova and Yaroslava Shvedova won the title, defeating Xenia Knoll and Aleksandra Krunić in the final, 6–1, 6–1.
Caroline Garcia and Katarina Srebotnik were the defending champions, but Garcia chose not to participate this year. Srebotnik played alongside Andreja Klepač, but lost in the first round to Anna-Lena Grönefeld and Květa Peschke.
Martina Hingis and Sania Mirza were the defending champions, but chose not to participate together. Mirza teamed up with Barbora Strýcová, but lost in the quarterfinals to Caroline Garcia and Kristina Mladenovic. Hingis played alongside CoCo Vandeweghe, but lost in the semifinals to Garcia and Mladenovic.
Xu Yifan and Zheng Saisai were the defending champions, but lost in the quarterfinals to Johanna Konta and Maria Sanchez.
Martina Hingis and Sania Mirza were the defending champions, but chose not to participate together. Hingis played alongside CoCo Vandeweghe, but lost in the second round to Ashleigh Barty and Casey Dellacqua. Mirza teamed up with Barbora Strýcová, but lost in the third round to Eri Hozumi and Miyu Kato.
Chuang Chia-jung and Darija Jurak were the defending champions, but chose not to participate together. Chuang played alongside Zheng Saisai, but lost in the first round to Gabriela Dabrowski and Jeļena Ostapenko. Jurak teamed up with Anastasia Rodionova, but lost in the second round to Dabrowski and Ostapenko.
Anabel Medina Garrigues and Arantxa Parra Santonja were the defending champions, but chose not to participate this year.
Caroline Garcia and Kristina Mladenovic were the defending champions, but Garcia chose not to participate this year. Mladenovic played alongside Svetlana Kuznetsova, but lost in the third round to Bethanie Mattek-Sands and Lucie Šafářová.
Xenia Knoll and Aleksandra Krunić were the defending champions, but Knoll chose to compete in Prague instead. Krunić played alongside Daria Gavrilova, but lost in the semifinals to Tímea Babos and Andrea Hlaváčková.
Anabel Medina Garrigues and Arantxa Parra Santonja were the defending champions, but chose not to participate this year.
Andrea Hlaváčková and Peng Shuai were the defending champions, but Peng chose not to participate and Hlaváčková chose to compete in s'Hertogenbosch instead.
Darija Jurak and Anastasia Rodionova were the defending champions, but lost in the first round to Ekaterina Makarova and Elena Vesnina.
Kiki Bertens and Johanna Larsson were the defending champions, but Bertens chose to compete in Brisbane instead and Larsson chose not to participate this year.
Kiki Bertens and Johanna Larsson were the defending champions, but Bertens chose not to participate. Larsson played alongside Mona Barthel, but lost in the semifinals to Hsieh Shu-ying and Hsieh Su-wei.
Alicja Rosolska and Abigail Spears were the defending champions, but Spears chose not to participate this year. Rosolska played alongside Yang Zhaoxuan, but lost in the first round to Alexa Guarachi and Erin Routliffe.
Tatjana Maria 
Heather Watson 
Kaitlyn Christian 
