2004 Heineken Open
Date	12–18 January
Edition	37th
Category	International Series
Draw	32S / 16D
Prize money	$379,000
Surface	Hard / outdoor
Location	Auckland, New Zealand
Venue	ASB Tennis Centre
Champions
Singles
Dominik Hrbatý[1]
Doubles
Mahesh Bhupathi / Fabrice Santoro[2]
← 2003 · ATP Auckland Open · 2005 →

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.

Finals

Singles

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. It was also Nadal's 1st ATP Tour final.

Doubles

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.