2004 BA-CA-TennisTrophy – Singles

Roger Federer was the defending champion, but did not participate this year.

Feliciano López won the title, defeating Guillermo Cañas 6–4, 1–6, 7–5, 3–6, 7–5 in the final.

Seeds
• # 🇦🇷 David Nalbandian (quarterfinals)

• # Nicolás Massú (quarterfinals)

• # 🇩🇪 Rainer Schüttler (quarterfinals)

• # 🇦🇷 Juan Ignacio Chela (first round)

• # 🇹🇭 Paradorn Srichaphan (second round)

• # 🇦🇷 Guillermo Cañas (final)

• # 🇨🇿 Jiří Novák (withdrew because of a rib injury)

• # 🇪🇸 Feliciano López (champion)