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Chelsea have conceded just once in six games under Thomas Tuchel.
Chelsea centre-back Andreas Christensen has explained the secret behind the defensive improvement under Tuchel.
The Dane said: “I have played four games in a row now and it has been a while since I’ve done that. All the manager says is just be comfortable.
“If you don’t need to play the ball, you don’t have to. Wait for someone to come and take the ball, don’t take last-second decisions, know what you’re going to do and make it happen.
“He just said to us to be comfortable and believe in ourselves. I have played in the middle of the three before and I’m quite comfortable there.
“At the moment, when we are playing good football and getting wins, it is helping us so we don’t have to do too much to change it.”