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 January 12 through January 18, 2004.
Dominik Hrbatý defeated Rafael Nadal 4–6, 6–2, 7–5
- It was Hrbatý's 2nd title of the year and the 7th of his career.
Mahesh Bhupathi / Fabrice Santoro defeated Jiří Novák / Radek Štěpánek 4–6, 7–5, 6–3
- It was Bhupathi's 1st title of the year and the 32nd of his career. It was Santoro's 1st title of the year and the 16th of his career.