Marat Safin defeated David Nalbandian in the final, 6–2, 6–4, 6–3 to win the singles tennis title at the 2004 Madrid Open.
Juan Carlos Ferrero was the defending champion, but lost to Luis Horna in the second round.
Seeds A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated. All sixteen seeds received a bye into the second round.
Tim Henman (third round) Andre Agassi (semifinals) Marat Safin (champion) David Nalbandian (final) Nicolás Massú (second round) Juan Carlos Ferrero (second round) Joachim Johansson (quarterfinals) Tommy Robredo (quarterfinals) Andrei Pavel (third round) Dominik Hrbatý (second round) Jiří Novák (second round) Juan Ignacio Chela (second round) Rainer Schüttler (second round) Vincent Spadea (third round) Fernando González (second round) Paradorn Srichaphan (third round)
Draw
Finals
Top half
Section 1
Section 2
Bottom half
Section 3
Section 4
Qualifying
Qualifying seeds
Qualified
Special exempt Davide Sanguinetti (reached the semifinals at Vienna)
Qualifying draw
First qualifier
Second qualifier
Third qualifier
Fourth qualifier
Fifth qualifier
Sixth qualifier
References
External links 2004 Main draw 2004 Qualifying draw ATP tournament profile