2004 Monte Carlo Masters – Singles

Guillermo Coria defeated Rainer Schüttler in the final, 6–2, 6–1, 6–3 to win the singles tennis title at the 2004 Monte Carlo Masters.

Juan Carlos Ferrero was the two-time defending champion, but lost in the first round to Àlex Corretja.

Seeds

 * 1) 🇺🇸 Andy Roddick (withdrew)
 * 2) 🇪🇸 Juan Carlos Ferrero (first round)
 * 3) 🇦🇷 Guillermo Coria (champion)
 * 4) 🇩🇪 Rainer Schüttler (final)
 * 5) 🇪🇸 Carlos Moyá (semifinals)
 * 6) 🇬🇧 Tim Henman (quarterfinals)
 * 7) 🇦🇷 David Nalbandian (quarterfinals)
 * 8) 🇫🇷 Sébastien Grosjean (second round)
 * 9)  Nicolás Massú (third round)
 * 10) 🇹🇭 Paradorn Srichaphan (first round)
 * 11)  Sjeng Schalken (first round)
 * 12) 🇨🇿 Jiří Novák (first round)
 * 13)  Fernando González (first round)
 * 14)  Martin Verkerk (second round)
 * 15) 🇺🇸 Mardy Fish (withdrew)
 * 16) 🇦🇺 Lleyton Hewitt (third round)