2013 Southern California Open – Singles

Dominika Cibulková was the defending champion, but lost in the first round to Ana Ivanovic.

Samantha Stosur won the title, defeating Victoria Azarenka in the final for the only time in her career with the score 6–2, 6–3.

Seeds
The top four seeds receive a bye into the second round. • # 🇧🇾 Victoria Azarenka (final)

• # 🇵🇱 Agnieszka Radwańska (quarterfinals)

• # 🇨🇿 Petra Kvitová (quarterfinals)

• # 🇮🇹 Roberta Vinci (quarterfinals)

• # 🇦🇺 Samantha Stosur (champion)

• # 🇷🇸 Jelena Janković (second round)

• # 🇷🇸 Ana Ivanovic (semifinals)

• # 🇪🇸 Carla Suárez Navarro (second round)

Seeds
• # 🇳🇿 Marina Erakovic (qualified)

• # 🇰🇿 Sesil Karatantcheva (qualified)

• # 🇺🇦 Olga Savchuk (qualifying competition)

• # 🇮🇹 Maria Elena Camerin (second round)

• # 🇺🇸 Nicole Gibbs (qualifying competition)

• # 🇯🇵 Sachie Ishizu (qualified)

• # Petra Rampre (second round)

• # 🇺🇸 Sachia Vickery (second round)

Qualifiers
• # 🇳🇿 Marina Erakovic

• # 🇰🇿 Sesil Karatantcheva

• # 🇺🇸 CoCo Vandeweghe

• # 🇯🇵 Sachie Ishizu