The 2004 Heineken Open was a tennis tournament played on outdoor hard courts at the ASB Tennis Centre in Auckland in New Zealand and was part of the International Series of the 2004 ATP Tour. The tournament ran from 12 January through 18 January 2004. Unseeded Dominik Hrbatý won the singles title.
See main article: 2004 Heineken Open – Singles. Dominik Hrbatý defeated Rafael Nadal 4–6, 6–2, 7–5
See main article: 2004 Heineken Open – Doubles. Mahesh Bhupathi / Fabrice Santoro defeated Jiří Novák / Radek Štěpánek 4–6, 7–5, 6–3