Defending champion Serena Williams defeated Jennifer Capriati in a rematch of the previous year's final, 4–6, 6–4, 6–1 to win the women's singles tennis title at the 2003 Miami Open.
This was Capriati’s third consecutive final at the Miami Open, also losing the 2001 final to Venus Williams.
Seeds All seeds received a bye into the second round.
Serena Williams (champion) Venus Williams (fourth round) Kim Clijsters (semifinals) Justine Henin-Hardenne (quarterfinals) Daniela Hantuchová (second round) Jennifer Capriati (final) Lindsay Davenport (fourth round, retired) Amélie Mauresmo (fourth round) Jelena Dokić (quarterfinals) Monica Seles (withdrew) Anastasia Myskina (second round) Chanda Rubin (semifinals) Magdalena Maleeva (third round) Eleni Daniilidou (third round) Anna Pistolesi (fourth round) Elena Bovina (second round) Ai Sugiyama (third round) Amanda Coetzer (second round) Elena Dementieva (second round) Silvia Farina Elia (third round) Nathalie Dechy (third round) Lisa Raymond (third round) Meghann Shaughnessy (quarterfinals) Alexandra Stevenson (second round) Tatiana Panova (third round) Clarisa Fernández (third round) Paola Suárez (third round) Elena Likhovtseva (third round) Iva Majoli (second round) Tamarine Tanasugarn (third round) Laura Granville (third round) Marie-Gayanay Mikaelian (second round)
Draw
Finals
Top half
Section 1
Section 2
Section 3
Section 4
Bottom half
Section 5
Section 6
Section 7
Section 8
Qualifying
Qualifying seeds
Qualifiers
Lucky loser Evie Dominikovic
Qualifying draw
First qualifier
Second qualifier
Third qualifier
Fourth qualifier
Fifth qualifier
Sixth qualifier
Seventh qualifier
Eighth qualifier
Ninth qualifier
Tenth qualifier
Eleventh qualifier
Twelfth qualifier
References
External links Main and Qualifying Draws (WTA) ITF tournament profile