2003 Copenhagen Open – Singles

Lars Burgsmüller was the defending champion but lost in the second round to Olivier Rochus.

Karol Kučera won in the final 7–6(7–4), 6–4 against Rochus.

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


 * 1) 🇫🇮 Jarkko Nieminen (first round)
 * 2) 🇦🇺 Wayne Arthurs (semifinals)
 * 3) 🇸🇰 Karol Kučera (champion)
 * 4) 🇨🇿 Radek Štěpánek (semifinals)
 * 5)  Kenneth Carlsen (first round)
 * 6)  Martin Verkerk (first round)
 * 7)  Mario Ančić (first round)
 * 8)  Raemon Sluiter (first round)