Lest we forget the 3 added on in the first half....11 minutes of extra time in total and finally it was down to a stuffy pen. But, bless 'em, they did it.
From the BBC website
90:00+7:14Full time
Full TimeSecond Half ends, Manchester United 1, Sheffield United 0.
90:00+6:43
Foul by Jesse Lingard (Manchester United).
90:00+6:43
Martyn Woolford (Sheffield United) wins a free kick in the defensive half.
90:00+5:51
Memphis Depay (Manchester United) wins a free kick in the defensive half.
90:00+5:51
Foul by Chris Basham (Sheffield United).
90:00+5:39
Attempt blocked. Ryan Flynn (Sheffield United) right footed shot from outside the box is blocked. Assisted by Louis Reed.
90:00+3:56
Bastian Schweinsteiger (Manchester United) wins a free kick in the defensive half.
90:00+3:56
Foul by Neill Collins (Sheffield United).
90:00+2:56Goal scored
Goal!Goal! Manchester United 1, Sheffield United 0. Wayne Rooney (Manchester United) converts the penalty with a right footed shot to the bottom left corner.
90:00+1:57
Penalty Manchester United. Memphis Depay draws a foul in the penalty area.
90:00+1:57
Penalty conceded by Dean Hammond (Sheffield United) after a foul in the penalty area.
90:00+0:38
Delay over. They are ready to continue.
90:00+0:37Substitution
SubstitutionSubstitution, Sheffield United. Matt Done replaces Conor Sammon because of an injury.
90:00+0:15
Delay in match Conor Sammon (Sheffield United) because of an injury.
So they played one minute and 14 seconds over and above the six minutes added.