The 2003 Acura Classic was a women's tennis tournament played on outdoor hard courts in San Diego in the United States. It was part of Tier II of the 2003 WTA Tour. It was the 25th edition of the tournament and was held from July 28 through August 3, 2003. Third-seeded Justine Henin-Hardenne won her third consecutive singles title at the event and earned $148,000 first-prize money as well as 220 ranking points.
See main article: 2003 Acura Classic – Singles. 
Justine Henin-Hardenne defeated Kim Clijsters, 3–6, 6–2, 6–3
See main article: 2003 Acura Classic – Doubles. Kim Clijsters / 
Ai Sugiyama defeated 
Lindsay Davenport / Lisa Raymond, 6–4, 7–5