In the winter of 1957, the Manchester United first team, the Busby Babes, were having a normal training session, led by Matt Busby and his assistant, Jimmy Murphy. United were top of the table, reigning league champions and doing well in Europe; Busby's only real concern was that his talented young team might become complacent and take their brilliance and success for granted.
He decided to keep the players behind for an extra hour's practice, wherein each player would be told a weakness in his game and spend time turning their flaws into strengths.
Busby went down the line of players, kindly but firmly identifying weaknesses. When he reached Duncan Edwards, Busby shrugged his shoulders and smiled. "Go and get changed, Duncan," he said. "See you tomorrow."