Sara Errani was the defending champion and she retained her title, beating Carla Suárez Navarro in the final, 6–0, 6–4.
Victoria Azarenka was the defending champion, but lost to Andrea Petkovic in the first round.
Angelique Kerber was the defending champion, but she chose not to participate this year.
Coco Vandeweghe was the defending champion, but lost in the quarterfinals to Kiki Bertens.
Heather Watson was the defending champion, but lost in the quarterfinals to Johanna Larsson.
Lara Arruabarrena and María Teresa Torró Flor were the defending champions, but chose not to compete together. Arruabarrena played alongside Paula Cristina Gonçalves, but lost in the quarterfinals to María Irigoyen and Paula Kania. Torró Flor was scheduled to team up with Shahar Pe'er, but withdrew before their first round match.
Anabel Medina Garrigues and Arantxa Parra Santonja won the title, defeating Kiki Bertens and Johanna Larsson in the final, 6–0, 6–4.
Chan Hao-ching and Anabel Medina Garrigues were the defending champions, but Chan chose not to participate this year and Medina Garrigues chose to compete in Strasbourg instead.
Kiki Bertens and Johanna Larsson won the title, defeating Shuko Aoyama and Renata Voráčová in the final, 6–3, 6–4.
Serena Williams was the two-time defending champion, but withdrew before the tournament began due to injury.
Kiki Bertens and Johanna Larsson were the defending champions, but lost in the quarterfinals to Andreea Mitu and Alicja Rosolska.
Misaki Doi was the defending champion, but lost in the first round to Lauren Davis.
Mona Barthel and Laura Siegemund were the defending champions, but Barthel chose not to participate this year. Siegemund played alongside Antonia Lottner, but lost in the first round to Annika Beck and Xenia Knoll.
Simona Halep was the defending champion and successfully defended her title, defeating Kristina Mladenovic in the final, 7–5, 6–7(5–7), 6–2.
Lara Arruabarrena and Xenia Knoll were the defending champions, but Arruabarrena chose not to participate this year. Knoll played alongside Anastasiya Komardina, but lost in the quarterfinals to Anna Kalinskaya and Evgeniya Rodina.
Kirsten Flipkens and Johanna Larsson were the defending champions, but Flipkens chose not to participate this year.
Kiki Bertens and Johanna Larsson were the defending champions and successfully defended their title, defeating Natela Dzalamidze and Xenia Knoll in the final, 3–6, 6–3, [10–4].
Kiki Bertens and Johanna Larsson were the defending champions, but withdrew from their first round match.
Sara Errani and Bibiane Schoofs were the defending champions, but Errani was unable to participate due to her doping suspension. Schoofs played alongside Desirae Krawczyk, but lost in the first round to Han Xinyun and Darija Jurak.
Alexa Guarachi and Desirae Krawczyk were the defending champions, but Krawczyk chose not to participate. Guarachi played alongside Erin Routliffe, but lost in the first round to Cornelia Lister and Renata Voráčová.
Eugenie Bouchard and Sofia Kenin were the defending champions, but chose not to participate this year.
Tímea Babos and Kristina Mladenovic were the defending champions and successfully defended their title, defeating Alexa Guarachi and Desirae Krawczyk in the final, 6–4, 7–5.
Alexa Guarachi 
Desirae Krawczyk 
Lara Arruabarrena 
Timea Bacsinszky 
