The 1990 Yugoslav Open was a men's tennis tournament played on outdoor clay courts in Umag, Yugoslavia that was part of the World Series (Designated Week) of the 1990 ATP Tour. It was the first edition of the tournament and was held from 14 May until 20 May 1990. No.1 seed Goran Prpić won the singles title.[1]
See main article: 1990 Yugoslav Open – Singles. Goran Prpić defeated Goran Ivanišević, 6–3, 4–6, 6-4
See main article: 1990 Yugoslav Open – Doubles. Vojtěch Flégl / Daniel Vacek defeated Andrei Cherkasov / Andrei Olhovskiy, 6–4, 6–4