Middlesbrough are closely monitoring Scotland youth international Leon King, who is expected to depart from Rangers this summer as a move to an English club appears increasingly probable. Alongside Middlesbrough, West Brom and Portsmouth are also keeping track of the defender. Relegated Premier League clubs Wolves and Burnley have conducted extensive checks on King, and Coventry City are also a contender. A significant factor for interested parties is the potential for a low-cost deal, as a cross-border transfer would only command minimum compensation.