2003 Bank of the West Classic – Singles

Venus Williams was the defending champion, but did not compete this year.

Kim Clijsters won the title by defeating Jennifer Capriati 4–6, 6–4, 6–2 in the final.

Seeds
The first five seeds received a bye into the second round. • # 🇺🇸 Serena Williams (withdrew due to a left knee pain)

• # 🇧🇪 Kim Clijsters (champion)

• # 🇺🇸 Jennifer Capriati (final)

• # 🇸🇰 Daniela Hantuchová (second round)

• # Jelena Dokic (quarterfinals)

• # 🇺🇸 Meghann Shaughnessy (second round)

• # Eleni Daniilidou (second round)

• # 🇷🇺 Nadia Petrova (first round)

• # 🇺🇸 Lisa Raymond (quarterfinals)