2015 Bank of the West Classic – Singles

Serena Williams was the defending champion, but withdrew due to an elbow injury.

Angelique Kerber won the title, defeating Karolína Plíšková in the final, 6–3, 5–7, 6–4.

Seeds
The top four seeds received a bye into the second round. • # Caroline Wozniacki (second round)

• # 🇵🇱 Agnieszka Radwańska (quarterfinals)

• # 🇪🇸 Carla Suárez Navarro (second round)

• # 🇨🇿 Karolína Plíšková (final)

• # 🇩🇪 Angelique Kerber (champion)

• # 🇩🇪 Andrea Petkovic (second round)

• # 🇺🇸 Madison Keys (second round)

• # 🇺🇦 Elina Svitolina (semifinals)

Seeds
• # 🇯🇵 Misaki Doi (qualified)

• # 🇺🇦 Kateryna Bondarenko (qualified)

• # 🇺🇸 Sachia Vickery (first round)

• # 🇺🇸 Anna Tatishvili (qualifying competition)

• # 🇺🇸 Nicole Gibbs (qualified)

• # Petra Martić (qualifying competition)

• # 🇯🇵 Naomi Osaka (first round)

• # 🇺🇸 Maria Sanchez (first round)

Qualifiers
• # 🇯🇵 Misaki Doi

• # 🇺🇦 Kateryna Bondarenko

• # 🇯🇵 Kimiko Date-Krumm

• # 🇺🇸 Nicole Gibbs