The 18-year-old Hajduk Split midfielder will return to the Croatian club on loan until summer.
Hajduk Split goalkeeper Karlo Letica says he has been surprised by speculation about a move to Real Madrid.
Everton have signed forward Nikola Vlasic from Hajduk Split on a five-year deal.
Everton's chances of signing Hajduk Split midfielder Nikola Vlasic received a boost after the teenager was given permission to leave Croatia training.
Gylfi Sigurdsson marked his first Everton start with a spectacular goal to help put Ronald Koeman's side into the group stages of the Europa League.
Merseyside Police detained one man after trouble flared during Thursday night's Europa League playoff tie between Everton and Hajduk Split.
Everton hold a 2-0 lead in their Europa League qualifying playoff tie against Hajduk Split after a first leg at Goodison Park.
Tottenham came from behind to take a 2-1 win in the first leg of their Europa League qualifying play-off against AEL Limassol.
UEFA has fined Ukrainian club Dnipro Dnipropetrovsk 50,000 euros ($66,500) for the hooligan behavior of its fans during a Champions League qualifying match against FC Copenhagen.
Chelsea have completed the signing of midfielder Mario Pasalic from Croatian club Hajduk Split.