Former England boss Graham Taylor has blasted Sunderland's defensive display in the 6-2 thrashing at Goodison Park.
Sam Allardyce's Sunderland side were left wanting and woefully exposed in the second half as Everton ripped them apart through the middle, with Wes Brown and Sebastian Coates, in particular, struggling to contain the Toffees forward line.
Allardyce, who deployed a new-look 5-3-2 formation, criticised his squad afterwards for their lack of understanding and discipline.
And ex-England, Watford and Aston Villa boss Taylor has gone a step further, labelling it one of the worst defensive displays he has ever witnessed.
Taylor, speaking on BBC Radio 5 Live, said: "You have to start with the defensive side when they don't have the ball.
"Attacking wise they were perfectly acceptable, defensively they are not picking up the runners, and not squeezing players when you should squeeze.
"Letting people, particularly for one goal, have the ball and run past you.
"I am sure Sam will pick up on this and get this defensive part right.
"Has this [the new formation] played a part? Perhaps it has.
"For me, the back part, played as if they didn't know one another, they didn't know what was happening.
"It was one of the worst defensive performances I have seen and Everton took full advantage of it."