The 2004 BellSouth Open was a men's tennis tournament played on outdoor clay courts in Viña del Mar, Chile and was part of the International Series of the 2004 ATP Tour. It was the eleventh edition of the tournament and ran from February 9 through February 15, 2004. Fifth-seeded Fernando González won the singles title.
See main article: 2004 BellSouth Open – Singles. Fernando González defeated Gustavo Kuerten 7–5, 6–4
See main article: 2004 BellSouth Open – Doubles. Juan Ignacio Chela / Gastón Gaudio defeated Nicolás Lapentti / Martín Rodríguez 7–6(7–2), 7–6(7–3)