Manager Roberto Martinez admitted Everton's sluggish defending cost them dear in Saturday's rollercoaster defeat to Chelsea.
Two strikes in the opening three minutes from Diego Costa and Branislav Ivanovic were the catalyst for a nine-goal battle at Goodison Park, the Blues ending up on the wrong end of a 6-3 scoreline despite some eye-catching periods of play.
Martinez was pleased with the attacking aspects of his side's performance but bemoaned an unusual series of errors at the back.
He said: "We started the game very uncharacteristically. It seemed we didn't have that defensive intensity, that focus that you have to have - especially against a team like Chelsea where you need to start sharply.
"We were chasing the game, but even when we went 2-0 down, we reacted really well.
"I thought we were very good going forward in the way we controlled the game for long spells and created chances to score three goals. I don't think many teams will score three against Chelsea this season.
"But the two boxes are going to dictate the scoreline and we were too soft with our defending. Every time the ball was around our 18-yard box we had a real sense of fear of it ending up in the back of the net.
"We have conceded 10 goals in three games and that's not like us at all. We have a back five that we didn't change the whole of last season when we kept 15 clean sheets but, at the moment, we are not at that level.
"We need to focus and work on the confidence and defensive intensity to protect Tim Howard that little bit better.
"I wouldn't take much notice about that today because that's the way the game went - we had to chase it."