The 2004 US Open was held between August 30, 2004 – September 12, 2004.

Both Andy Roddick and Justine Henin-Hardenne were unsuccessful in their title defenses, Roddick losing in the quarter-finals to Joachim Johansson and Henin-Hardenne falling in the fourth round to Nadia Petrova.

On the men's side, Roger Federer won his first US Open, defeating rival and 2001 champion Lleyton Hewitt in a lopsided final.

Svetlana Kuznetsova won the women's title defeating Elena Dementieva in the final.

Roger Federer[1] defeated Lleyton Hewitt, 6–0, 7–6(7–3), 6–0 Svetlana Kuznetsova defeated Elena Dementieva, 6–3, 7–5 Mark Knowles / Daniel Nestor defeated Leander Paes / David Rikl, 6–3, 6–3 Virginia Ruano Pascual / Paola Suárez defeated Svetlana Kuznetsova / Elena Likhovtseva, 6–4, 7–5 Vera Zvonareva / Bob Bryan defeated Alicia Molik / Todd Woodbridge, 6–3, 6–4 Andy Murray[2] defeated Sergiy Stakhovsky, 6–4, 6–2 Michaëlla Krajicek defeated Jessica Kirkland, 6–1, 6–1 Brendan Evans / Scott Oudsema defeated Andreas Beck / Sebastian Rieschick, 4–6, 6–1, 6–2 Marina Erakovic / Michaëlla Krajicek defeated Mădălina Gojnea / Monica Niculescu, 7–6(7–4), 6–0