2003 JPMorgan Chase Open – Singles

Chanda Rubin was the defending champion, but was forced to withdraw due to a right shoulder tendonitis. However, she recovered in time to compete in the doubles tournament, losing in the first round.

Kim Clijsters won the title by defeating Lindsay Davenport 6–1, 3–6, 6–1 in the final. This victory allowed Clijsters to reach the World No. 1 ranking, ending the 57-week reign of Serena Williams.

Seeds
All seeds received a bye into the second round. • # 🇧🇪 Kim Clijsters (champion)

• # 🇺🇸 Lindsay Davenport (final)

• # 🇺🇸 Chanda Rubin (withdrew due to a right shoulder tendonitis)

• # 🇯🇵 Ai Sugiyama (semifinals)

• # Jelena Dokic (second round)

• # 🇧🇬 Magdalena Maleeva (quarterfinals)

• # 🇪🇸 Conchita Martínez (third round)

• # Amanda Coetzer (quarterfinals)

• # 🇷🇺 Elena Dementieva (second round)

• # 🇺🇸 Meghann Shaughnessy (third round)

• # 🇮🇹 Silvia Farina Elia (third round)

• # Eleni Daniilidou (second round)

• # 🇷🇺 Elena Bovina (second round)

• # 🇷🇺 Nadia Petrova (second round)

• # 🇺🇸 Alexandra Stevenson (second round, retired)

• # 🇮🇹 Francesca Schiavone (semifinals)