Nikola Vlasic says he is honoured to have the opportunity to play for Everton in the Premier League.
The 19-year-old played against the Toffees in their recent Europa League qualifying tie against Hajduk Split, impressing manager Ronald Koeman.
The Croatia Under-21 international has scored 10 times in 85 appearances for Hajduk since making his first-team debut in July 2014.
“I am very excited about the opportunity to play for this big club,” said Vlasic.
“The Premier League is the best league in the world and this is one of the top clubs in England.