Carlos Moyá was the defending champion but lost in the quarterfinals to Félix Mantilla.
Agustín Calleri won in the final 7–5, 3–6, 6–3 against Mariano Zabaleta.
Seeds
Carlos Moyá (quarterfinals) David Nalbandian (second round) Gastón Gaudio (second round) Fernando González (quarterfinals) Juan Ignacio Chela (first round) Gustavo Kuerten (semifinals) Marcelo Ríos (quarterfinals) Nicolás Lapentti (first round)
Draw
Finals
Top half
Bottom half
External links 2003 Abierto Mexicano Telefonica Movistar Draw 2003 Abierto Mexicano Telefonica Movistar Qualifying Draw