The Daily Mail says sporting director Franco Baldini has been in negotiations with the Croatian club over recent weeks and is looking to strike a deal for around £1.8million.
However, Split want closer to £4.5m for the coveted 16-year-old who has already broken into their first team.
The shaggy-haired teenager often plays in a defensive role for his club and has appeared for Croatia U18s. He was watched by Tottenham scouts playing against England in March.
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