Everton have completed a deal to sign Hajduk Split's teenage forward Nikola Vlasic for a fee believed to be £10m.
The 19-year-old was granted leave from Croatia's Under-21s to discuss a move to Goodison Park before Thursday's 23:00 BST deadline.
Vlasic impressed Everton manager Ronald Koeman and director of football Steve Walsh in the Toffees' recent Europa League qualifying tie with Hajduk.
Koeman wanted to sign a high-profile striker and left-sided defender.
Vlasic said: "The Premier League is the best league in the world and this is one of the top clubs in England. It is such a big honour for me to be here.
"When I heard that Everton were interested in me, I knew straight away I wanted to come here."
Koeman added: "He is one of the big young talents in Europe.
"He is one of those players who can play a big part in Everton's future and in what we want to achieve as a club. I think we can do great things together."
Everton have enjoyed a productive transfer window, completing a club record £45m deal for Swansea's Gylfi Sigurdsson, re-signing Wayne Rooney from Manchester United and spending a potential £30m each on centre-back Michael Keane and goalkeeper Jordan Pickford.
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