Ricardo Carvalho has called for greater unity at Chelsea as they look to overcome their recent defensive woes.
Saturday's 3-3 Stamford Bridge draw with Everton was the fourth game in succession that the Blues have failed to win, with 10 goals conceded in that period.
Carlo Ancelotti's side remain at the head of the Premier League table and are through to the last 16 in the UEFA Champions League, but crashed out of the Carling Cup against Blackburn.
Much of the spotlight has fallen on goalkeeper Petr Cech, but Carvalho insists they should all take responsibility after a series of recent blunders.
"Right now every mistake we make, we concede a goal," he told the London Evening Standard.
"We are playing well but we have to be more compact, especially at set-pieces, free-kicks and corners.
"When someone makes a mistake you have to be there to help him. Against Everton one goal came from a throw-in and the other two from free-kicks."
Carvalho is in line to make his 200th appearance for Chelsea against Portsmouth on Wednesday and the Portugal international is keen for a return to winning ways.
The home meeting with former manager Avram Grant's struggling side represents an ideal opportunity for the Blues to regain the initiative.
Carvalho added: "I think I am playing well, however I can't enjoy it because we're drawing or losing. I'm a little bit frustrated."