Leeds United completed Italian centre-back Tarik Muharemović their latest signing.
The 24-year-old transfers from Sassuolo for a said £34.1 million fee.
The deal makes him among the club's most expensive defenders.
He has agreed to a long-term contract.
Leeds' new man vowed his maximum effort in the transfer statements.
Club insiders currently call him one of the best left-footed centre-backs in the country.