Sir Alex Ferguson's fierce pride did not allow him to lose Wayne Rooney to Manchester City during the striker's infamous contract stand-off.
Rooney threatened to leave Manchester United in 2010 after publicly criticising the club's lack of ambition and declaring his intention to run his contract down.
City wanted to lure Rooney across Manchester to join their revolution under Sheikh Mansour, but Ferguson pulled off a managerial masterstroke by convincing the striker to sign a new deal.