Earlier this week, we asked you to vote on eight iconic images of classic Old Trafford goals, and some era-defining shots of United and England legend Sir Bobby Charlton.
Now our focus switches to another knight of the realm – Sir Alex Ferguson, the most successful manager in the club's long and storied history.
Later in the week, we'll ask for your help when it comes to selecting the best pictures that feature Sir Matt Busby, European nights at Old Trafford and Manchester United Women.
But today, it 's all about Sir Alex – the Govan-born Scot who joined the club in November 1986 after an extraordinarily fruitful spell at Aberdeen.