2015 Bank of the West Classic

The 2015 Bank of the West Classic was a professional tennis tournament played on hard courts. It was the 44th edition of the tournament, which was part of the WTA Premier tournaments of the 2015 WTA Tour, making it the longest-running women's only tennis tournament. It took place in Stanford, California, United States between 3 and 9 August 2015. It was the first women's event on the 2015 US Open Series.

Seeds

 * 1 Rankings are as of July 27, 2015.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇺🇸 Catherine Bellis
 * 🇵🇱 Agnieszka Radwańska
 * Caroline Wozniacki
 * 🇨🇦 Carol Zhao

The following players received entry from the qualifying draw:
 * 🇺🇦 Kateryna Bondarenko
 * 🇯🇵 Kimiko Date-Krumm
 * 🇯🇵 Misaki Doi
 * 🇺🇸 Nicole Gibbs

Withdrawals

 * Before the tournament
 * 🇪🇸 Garbiñe Muguruza → replaced by 🇩🇪 Tatjana Maria
 * 🇨🇿 Kateřina Siniaková → replaced by Ajla Tomljanović
 * 🇺🇸 Serena Williams → replaced by 🇷🇸 Aleksandra Krunić

Seeds

 * 1 Rankings are as of July 27, 2015.

Other entrants
The following pair received wildcards into the main draw:
 * 🇺🇸 Catherine Bellis / 🇺🇸 Jacqueline Cako

Singles

 * 🇩🇪 Angelique Kerber defeated 🇨🇿 Karolína Plíšková, 6–3, 5–7, 6–4

Doubles

 * 🇨🇳 Xu Yifan / 🇨🇳 Zheng Saisai defeated 🇪🇸 Anabel Medina Garrigues / 🇪🇸 Arantxa Parra Santonja, 6–1, 6–3