2003 Abierto Mexicano Telefonica Movistar – Women's singles

Katarina Srebotnik was the defending champion, but lost in second round to Petra Mandula.

[1] Amanda Coetzer won the title by defeating Mariana Díaz Oliva 7–5, 6–3 in the final.

[2] It was the 9th and last title for Coetzer in her career.

The first two seeds received a bye into the second round.