Former Liverpool defender Alan Hansen has hit out at Chelsea duo John Terry and David Luiz for their "catastrophic" form this season.

Andre Villas-Boas's side have come under criticism for dropping twelve points below Premier League leaders Manchester City after a 2-1 defeat to Liverpool at Stamford Bridge on Sunday.

"Chelsea were incredibly lucky to stay in the game for as long as they did. I can only describe some of the defending I'm witnessing as catastrophic," Hansen wrote in The Telegraph.

"Luiz hasn't got a clue how to defend in a flat back four. Playing so high up is a disaster waiting to happen.

"Terry's made more mistakes in his last eight games than he has in the last eight years."

The Blues' next game is a Champions League group clash against Bayer Leverkusen tomorrow.