The newly promoted Foxes came from 3-1 down to beat Lous Van Gaal’s stuttering outfit in a Walker Stadium TV thriller yesterday.
And for all the attacking flair and money spent on front runners ‘The Birch’ pointed towards the back four as the point of weakness.
Birchenall – a City stalwart for 40 years – is still getting his wise old head around the victory and claimed it had to rank among the top five in the club’s history.
And he pointed out the way the Irons can beat them explaining that City had been aware of the dodgy United defence.
He said: “We knew they were vulnerable and if you can get wide you can take advantage of that.”