2009 Bank of the West Classic – Singles

Aleksandra Wozniak was the defending champion, but lost to Daniela Hantuchová in the first round.

Marion Bartoli reached her second straight final and won the title, defeating Venus Williams 6–2, 5–7, 6–4.

Seeds
• # 🇺🇸 Serena Williams (quarterfinals)

• # 🇺🇸 Venus Williams (final)

• # 🇷🇺 Elena Dementieva (semifinals)

• # 🇷🇸 Jelena Janković (quarterfinals)

• # 🇷🇺 Nadia Petrova (second round)

• # 🇸🇰 Dominika Cibulková (first round)

• # 🇵🇱 Agnieszka Radwańska (second round)

• # 🇫🇷 Marion Bartoli (champion)