2003 Toray Pan Pacific Open – Singles

Lindsay Davenport defeated Monica Seles in the final, 6–7(6–8), 6–1, 6–2 to win the singles tennis title at the 2003 Pan Pacific Open. It was her first title of the season, and the 38th of her career.

Martina Hingis was the reigning champion, but did not compete this year. Hingis would retire from professional tennis one month later.

Seeds
The first four seeds received a bye into the second round. • # 🇺🇸 Monica Seles (final)

• # Jelena Dokic (quarterfinals)

• # 🇺🇸 Lindsay Davenport (champion)

• # 🇺🇸 Chanda Rubin (semifinals)

• # 🇧🇬 Magdalena Maleeva (second round)

• # 🇮🇹 Silvia Farina Elia (second round)

• # 🇮🇱 Anna Pistolesi (first round)

• # 🇷🇺 Elena Dementieva (quarterfinals)

Qualifying seeds
• # 🇷🇺 Elena Likhovtseva (second round)

• # 🇨🇿 Dája Bedáňová (second round)

• # 🇺🇸 Laura Granville (second round)

• # 🇮🇹 Rita Grande (qualified)

• # 🇺🇸 Jill Craybas (first round)

• # Cara Black (first round)

• # 🇰🇷 Cho Yoon-jeong (qualifying competition)

• # 🇧🇪 Els Callens (qualifying competition)

Qualifiers
• # 🇰🇷 Jeon Mi-ra

• # 🇷🇺 Lina Krasnoroutskaya

• # 🇫🇷 Stéphanie Cohen-Aloro

• # 🇮🇹 Rita Grande