2003 Idea Prokom Open – Men's singles

José Acasuso was the defending champion but did not compete that year.

Guillermo Coria won in the final 7–5, 6–1 against David Ferrer.

Seeds
A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.


 * 1) 🇪🇸 Juan Carlos Ferrero (quarterfinals)
 * 2) 🇪🇸 Carlos Moyá (first round)
 * 3) 🇦🇷 Guillermo Coria (champion)
 * 4) 🇦🇷 David Nalbandian (second round)
 * 5) 🇮🇹 Filippo Volandri (first round)
 * 6) 🇪🇸 David Sánchez (second round)
 * 7) 🇸🇰 Dominik Hrbatý (second round)
 * 8) 🇫🇷 Olivier Mutis (quarterfinals)