1991 Yugoslav Open – Singles

Goran Prpić was the defending champion, but did not compete this year.

Dimitri Poliakov won the title by defeating Javier Sanchez 6–4, 6–4 in the final.

Seeds
• # 🇺🇸 Richey Reneberg (quarterfinals)

• # 🇺🇸 Derrick Rostagno (first round)

• # 🇺🇸 David Wheaton (first round)

• # 🇮🇱 Gilad Bloom (first round)

• # 🇦🇷 Francisco Clavet (quarterfinals)

• # 🇪🇸 Javier Sanchez (final)

• # 🇩🇪 Carl-Uwe Steeb (second round)

• # 🇫🇷 Thierry Champion (first round)