Cech has played 10 Barclays Premier League matches this season, conceding 15 goals
Chelsea goalkeeper Petr Cech says the Club's poor recent form is down to the players, not manager Andre Villas-Boas.
The Portuguese boss has come under pressure in recent weeks after seeing his team drop out of the top four in the Barclays Premier League and struggle in the Champions League too.
But Cech says there is nothing Villas-Boas can do about the mistakes he and his team-mates are making and has urged the Blues to improve their performances.
"The manager is not on the pitch, we are and we are making mistakes," Cech told the Club's official website (chelseafc.com). "He cannot do anything about individual mistakes while he is standing by the bench.
"The players are to blame and we know it and we are trying to make things happen and change. It is not easy, but we will keep going.
"We have been talking recently about the same mistakes - concentration, and little details when we don't go to clear the ball. I think we need to be more aggressive in terms of defending."
Villas-Boas, 34, was recruited by Chelsea owner Roman Abramovich in the summer from FC Porto, where he had won the Portuguese League, Cup and the Europa League Treble in his first full season as a manager.
