Leeds United made Italian centre-back Tarik Muharemović their newest signing.
The 24-year-old joins from Sassuolo for a reported £34.1 million fee.
The deal makes him among the club's priciest defenders.
He has secured a extended contract.
Leeds' new man vowed his maximum effort in the transfer statements.
Club insiders currently call him among finest left-footed centre-backs around.