1999 Croatia Open – Singles

Bohdan Ulihrach was the defending champion, but lost in the first round to Juan Antonio Marín.

Magnus Norman won the title by defeating Jeff Tarango 6–2, 6–4 in the final.

Seeds
• # 🇪🇸 Carlos Moyá (quarterfinals)

• # 🇪🇸 Félix Mantilla (second round)

• # 🇸🇰 Dominik Hrbatý (quarterfinals)

• # 🇪🇸 Francisco Clavet (quarterfinals)

• # 🇦🇷 Mariano Zabaleta (first round)

• # 🇨🇿 Bohdan Ulihrach (first round)

• # 🇦🇷 Mariano Puerta (first round)

• # 🇸🇪 Magnus Norman (champion)