Stefan Koubek was the defending champion but lost in the second round to Hyung-Taik Lee.
Nicolas Escudé won in the final 6–3, 7–6(7–4) against Ivan Ljubičić.
Seeds
Andy Roddick (second round) Rainer Schüttler (first round) Mark Philippoussis (first round) Sébastien Grosjean (quarterfinals) Nicolás Massú (first round) Younes El Aynaoui (first round) Tim Henman (semifinals) Agustín Calleri (semifinals)
Draw
Finals
Top half
Bottom half
External links 2004 Qatar Open main draw 2004 Qatar Open qualifying draw