Iconic ex-Manchester United manager Sir Alex Ferguson was “devastated” after he failed to bring one legendary World Cup winner to Old Trafford. That is according to United legend Rio Ferdinand, who candidly opened up on how Ferguson ended up signing another legendary footballer instead. Ferguson’s legendary managerial career at Old Trafford came to an end in 2013 after he led United to their last Premier League title. The 82-year-old iconic Scotsman has previously opened up on his regret in not signing one player, despite managing several world-class players at Old Trafford. Ferguson’s 26-year…