The main draw for the 36th edition of the Plava Laguna Croatia Open Umag was held on Saturday in the tournament's Social Zone, with the Croatian players handed challenging opening-round matchups.

Dino Prizmic, who has already reached the quarter-finals in Umag twice, will open his campaign against eighth seed Vít Kopriva of the Czech Republic. Matej Dodig, meanwhile, has been drawn against experienced Spaniard Pablo Carreno Busta, a former Top 10 player and winner of seven ATP Tour titles.

Prizmic and Kopriva have never met on the ATP Tour. This will be the Czech's second appearance in Umag, having recorded one win and one loss at last year's tournament. Currently ranked World No. 64, Kopriva's best results this season include a semi-final run in Rio de Janeiro and a fourth-round appearance at the ATP Masters 1000 event in Madrid.

Prizmic sits at No. 89 in the latest ATP Rankings. On both of his previous quarter-final runs in Umag, he was stopped by the eventual tournament champion.

Dodig will arrive in Umag on Sunday evening after contesting the ATP Challenger final in Trieste. Awaiting him is Carreno Busta, whose career highlights include winning the ATP Masters 1000 title in Canada. The Spaniard is currently ranked World No. 71.

Dodig is one of three players awarded a main-draw wildcard. The other two are Slovenia's Ziga Sesko, this year's Australian Open boys' singles champion, and Germany's Niels McDonald, the reigning French Open boys' singles champion.

The tournament's top four seeds – Flavio Cobolli, Alejandro Davidovich Fokina, Tomas Martín Etcheverry and Matteo Arnaldi – all receive first-round byes and will begin their campaigns in the Round of 16.

Main-draw action gets underway on Monday.