Sir Alex Ferguson once made Cristiano Ronaldo cry in front of the rest of the Manchester United squad after one of his legendary hairdryer treatments - according to a new documentary about the club icon. 'Sir Alex' is released on BBC iPlayer on Boxing Day, and chronicles the successful life of the United boss, who picked up 13 Premier League titles and two Champions League trophies at Old Trafford. The documentary offers insight into the man behind the manager, reflecting on his childhood,