Leeds United completed Italian centre-back Tarik Muharemović their most recent signing.
The 24-year-old moves from Sassuolo for a reported £34.1 million fee.
The deal makes him amongst the club's most expensive defenders.
He has signed a multi-year contract.
Leeds' new man vowed his maximum effort in the transfer statements.
Club insiders now call him among best left-footed centre-backs around.