2006 PBZ Zagreb Indoors – Singles

Ivan Ljubičić won the title, defeating Stefan Koubek 6–3, 6–4 in the final.

Seeds

 * 1)  Ivan Ljubičić (champion)
 * 2) 🇪🇸 David Ferrer (first round)
 * 3) 🇫🇷 Richard Gasquet (second round)
 * 4) 🇨🇿 Radek Štěpánek (second round)
 * 5)  Mario Ančić (second round)
 * 6) 🇫🇮 Jarkko Nieminen (second round)
 * 7) 🇷🇺 Igor Andreev (first round)
 * 8) 🇪🇸 Feliciano López (second round)