She had early exits in the Middle East before making the quarterfinals in Indian Wells and the fourth round in Miami, falling to Karolína Plíšková and retiring against Caroline Wozniacki respectively.

She found form in Rome, reaching the semifinals, but failed to defend her French Open crown, ousted in the fourth round by Kristina Mladenovic.

Halep began to put in impressive results in the clay court season, starting with a semifinal showing in Stuttgart.

Karolína Plíšková began her season with a strong showing in Brisbane, winning the title by defeating Alizé Cornet in the final.

Plíšková very quickly got back on the winner's board, claiming the title in Doha with a win over Caroline Wozniacki in the final.

She had consistent results in Indian Wells and Miami, losing in the semifinals of both tournaments to Svetlana Kuznetsova and Caroline Wozniacki respectively.

She looked back on top of her game when the grass court swing came around, winning the title in Eastbourne over Caroline Wozniacki.

She then entered Tokyo and Wuhan, reaching the quarterfinals at both tournaments before losing to Angelique Kerber and Ashleigh Barty respectively.

Her next two tournaments ended with a trophy, defeating Peng Shuai in the final of Taipei, before coming away victorious in Dubai against Caroline Wozniacki.

However, her next three tournaments were not as successful, retiring in the second round in Kuala Lumpur and suffering early exits in Indian Wells and Miami.

Getting back on hard courts, Svitolina wasted no time picking up another title, defeating Caroline Wozniacki in the final of Toronto.

A quarterfinal loss to Caroline Garcia in Beijing followed, and in her most recent tournament in Hong Kong, she withdrew before her second-round match.

Williams returned to form for the Sunshine swing, falling to Elena Vesnina in Indian Wells and Johanna Konta in Miami, both of whom went on to claim the title.

She put in better performances in her next two tournaments, losing to Garbiñe Muguruza in the quarterfinals of Madrid, before falling in the fourth round of the French Open against Timea Bacsinszky.

Wozniacki then made back-to-back finals in the Middle East, falling to Karolína Plíšková in Doha and Elina Svitolina in Dubai.

Her solid form stayed with her in Indian Wells and Miami, losing in the quarterfinals of the former to Kristina Mladenovic before making her first Premier Mandatory final in four years at the later.

Wozniacki's first two clay court tournaments were in Charleston and Prague, both of which came to end at the hands of Jeļena Ostapenko in the quarterfinals and second round respectively.

Despite the positive result, she was unable to progress as far at Wimbledon, bowing out in the fourth round after losing in straight sets to CoCo Vandeweghe.

She then lost in the quarterfinals of Cincinnati to Karolína Plíšková, before a surprise loss to Ekaterina Makarova ended her US Open campaign in the second round.

Her form didn't improve much on the Sunshine swing either, losing to Dominika Cibulková in the second round of Indian Wells and dropping her first-round match in Miami.

Her quality results continued in Asia, reaching the semifinal stage in both Wuhan and Beijing, falling to Ashleigh Barty and Simona Halep respectively.

From there, she reached the fourth round in Indian Wells, losing to Svetlana Kuznetsova and then was knocked out in her opening match in Miami by Peng Shuai.

She continued to progress deeper into her next couple of tournaments, losing in the second round and semifinals of Rome and Strasbourg respectively, both to Daria Gavrilova.

Her grass court results were also solid, losing in the semifinals of Mallorca, and the fourth round of Wimbledon, where she was defeated by Johanna Konta.

Garcia's Asian swing brought about very good results beginning with a quarterfinal loss to Garbiñe Muguruza in Tokyo.

Shen then won back-to-back titles in Wuhan and Beijing, defeating Ashleigh Barty and Simona Halep in the respective finals.

They continued their triumphant performance in the grass court season, winning two titles in a row (Mallorca and Eastbourne), but reaching the quarterfinals of Wimbledon.

Since 2015, Barty partnered with other players and played mainly in the ITF tour, while Dellacqua had some success with Yaroslava Shvedova in 2015, but had to withdraw from the WTA Finals as she incurred a concussion in Beijing.

However, the duo played well in the grass court season, winning one tournament out of two, and reaching the quarterfinals of the Wimbledon Championships.

Gabriela Dabrowski and Xu Yifan debuted as a team in Miami, surprisingly beating top players such as Makarova/Vesnina, Hlaváčková/Peng and Mirza/Strýcová on their way before claiming their first title.