Angry Chelsea coach Carlo Ancelotti labelled his side "frightened" after a shocking second half display cost them the chance to go back to the top of the Barclays Premier League as they recorded a 1-1 draw with Everton.
Chelsea looked to be on course for three points thanks to Didier Drogba's 42nd-minute penalty but Toffees substitute Jermaine Beckford headed an equaliser four minutes from time.
"The problem is on the pitch and we have to work to resolve this. First half the spirit was good. I saw the players in focus and concentrated with good tactical discipline. But in the second half they were scared, afraid and played the long ball," said Ancelotti.
The Blues have now won just once in their last six league games and Ancelotti was clearly rattled by another sub-standard display from the double winners.
"I am disappointed and angry," declared Ancelotti. "Not just because of the result. We played good football in the first half and the second half was totally different. We played the long ball. We were a little bit scared. I didn't like this.
"We are working to play a particular kind of football and I don't understand why we have changed it. We have to look at it and I have to understand and change it.
"I don't think it is a problem of concentration. Everybody knew it was a very important game for us to move on from the difficult moment we are still in.
"We have to do better day-by-day on the training ground, in the training sessions. We have to work harder than we are doing. This is the way I know to move on in a difficult moment.
"We needed to play better from the back and in the second half, it was the wrong way to play football.
"I am worried yes, because we haven't won a lot of games. The second half was totally wrong. We have to do better."