2009 LA Women's Tennis Championships – Singles

World No. 1 Dinara Safina was the defending champion, but she lost in the third round against Zheng Jie.

Flavia Pennetta won in the final 6–4, 6–3 against Samantha Stosur.

Seeds
The top eight seeds receive a bye into the second round. • # 🇷🇺 Dinara Safina (third round)

• # 🇷🇺 Vera Zvonareva (quarterfinals)

• # 🇧🇾 Victoria Azarenka (second round)

• # Caroline Wozniacki (second round)

• # 🇷🇺 Nadia Petrova (third round)

• # 🇷🇸 Ana Ivanovic (third round)

• # 🇸🇰 Dominika Cibulková (second round)

• # 🇵🇱 Agnieszka Radwańska (quarterfinals)

• # 🇫🇷 Marion Bartoli (withdrew)

• # 🇮🇹 Flavia Pennetta (champion)

• # 🇫🇷 Virginie Razzano (first round)

• # 🇨🇳 Li Na (third round, withdrew due to a right knee injury)

• # 🇦🇺 Samantha Stosur (final)

• # 🇨🇳 Zheng Jie (quarterfinals)

• # 🇪🇪 Kaia Kanepi (first round)

• # 🇮🇹 Francesca Schiavone (first round)

• # 🇩🇪 Sabine Lisicki (third round, Retired due to a right shoulder injury)