2004 Australian Open
Date	19 January – 1 February 2004
Edition	92nd
Category	Grand Slam (ITF)
Surface	Hardcourt (Rebound Ace)
Location	Melbourne, Australia
Venue	Melbourne Park
Champions
Men's singles
Roger Federer
Women's singles
Justine Henin-Hardenne
Men's doubles
Michaël Llodra / Fabrice Santoro
Women's doubles
Virginia Ruano Pascual / Paola Suárez
Mixed doubles
Elena Bovina / Nenad Zimonjić
Wheelchair men's singles
David Hall
Wheelchair women's singles
Esther Vergeer
Wheelchair men's doubles
Robin Ammerlaan / Martin Legner
Wheelchair women's doubles
Maaike Smit / Esther Vergeer
Boys' singles
Gaël Monfils
Girls' singles
Shahar Pe'er
Boys' doubles
Scott Oudsema / Brendan Evans
Girls' doubles
Chan Yung-jan / Sun Sheng-Nan
← 2003 · Australian Open · 2005 →

The 2004 Australian Open was a Grand Slam tennis tournament held in Melbourne, Australia from 19 January to 1 February 2004.

Andre Agassi was unsuccessful in defending his 2003 title, being defeated in the semi-finals by Marat Safin. This ended a 26-match winning streak for Agassi at the Australian Open, having previously won in 2000, 2001 and 2003, missing 2002 through injury. Roger Federer won his first Australian Open title, defeating Safin in the final. Serena Williams was unable to defend her 2003 title after withdrawing from the tournament due to a left knee injury. Justine Henin-Hardenne defeated compatriot and rival Kim Clijsters in the final to win her only Australian Open title.

Seniors

Men's singles

Roger Federer^[1] defeated Marat Safin, 7–6^(7–3), 6–4, 6–2

• It was Federer's 1st title of the year, and his 12th overall. It was his 2nd career Grand Slam title, and his 1st Australian Open title.

Women's singles

Justine Henin-Hardenne^[2] defeated Kim Clijsters, 6–3, 4–6, 6–3

• It was Henin-Hardenne's 2nd title of the year, and her 16th overall. It was her 3rd career Grand Slam title, and her 1st Australian Open title.

Men's doubles

Michaël Llodra / Fabrice Santoro defeated Bob Bryan / Mike Bryan, 7–6^(7–4), 6–3

• It was Llodra's 2nd career Grand Slam doubles title and his 2nd (consecutive) at the Australian Open.
• It was Santoro's 2nd career Grand Slam doubles title and his 2nd (consecutive) at the Australian Open.

Women's doubles

Virginia Ruano / Paola Suárez defeated Svetlana Kuznetsova / Elena Likhovtseva, 6–4, 6–3

Mixed doubles

Elena Bovina / Nenad Zimonjić defeated Martina Navratilova / Leander Paes, 6–1, 7–6^(7–3)

• It was Bovina's 1st career Grand Slam mixed doubles title.
• It was Zimonjić's 1st career Grand Slam mixed doubles title.

Juniors

Boys' singles

Gaël Monfils defeated Josselin Ouanna, 6–0, 6–3

Girls' singles

Shahar Pe'er defeated Nicole Vaidišová, 6–1, 6–4

Boys' doubles

Scott Oudsema / Brendan Evans defeated David Galić / David Jeflea, 6–1, 6–1

Girls' doubles

Chan Yung-jan / Sun Shengnan defeated Veronika Chvojková / Nicole Vaidišová, 7–5, 6–3

Wheelchair

Men's singles

David Hall defeated Robin Ammerlaan, 6–4, 7–5

Women's singles

Esther Vergeer defeated Daniela Di Toro, 4–6, 6–3, 6–1

Men's doubles

Robin Ammerlaan / Martin Legner defeated Tadeusz Kruszelnicki / Satoshi Saida, 6–3, 6–3

Women's doubles

Maaike Smit / Esther Vergeer defeated Sonja Peters / Sharon Walraven, 6–3, 7–6(3)