Marin Cilic became the first home player to win the Croatia Open in 22 years, beating Marcel Granollers of Spain 6-4, 6-2 in Sunday's final.
Cilic trailed 4-2 in the first set before winning nine games in a row to seize a commanding 5-0 lead in the second.
Granollers saved two match points before Cilic sealed the victory with a forehand winner.
Cilic is the first Croat to claim the title since Goran Prpic won the inaugural event in 1990. It was Cilic's second title of the year after winning at Queen's Club last month.
Cilic told the crowd in Umag that "this was a special week and a special victory for me," and that "I played some great tennis."