Unai Emery's vast power at Aston Villa poses major hurdle for Manchester United as Old Trafford bosses prepare for life after Michael Carrick

Manchester United could face major complications if they attempt to lure Aston Villa head coach Unai Emery to Old Trafford as a potential replacement for Michael Carrick. While the Spanish tactician is highly admired by the Red Devils' hierarchy, his sweeping authority in the West Midlands makes any prospective switch difficult to pull off.