Chelsea goalkeeper Petr Cech admits individual errors are wrecking their season. Their defending for Ezequiel Lavezzi's double in Napoli's 3-1 win in Italy on Tuesday was far from impressive, as David Luiz limply kicked the ball against Edinson Cavani in the build up.

And Cech said: "We know he (Villas-Boas) keeps working hard for us. He prepares every game with 100 per cent commitment and we appreciate it as players.

"But if you have players on the pitch making mistakes he can't help it."