Chelsea boss Luiz Felipe Scolari admits preparing for this weekend's contest with Stoke City has been more difficult than matches against Manchester United and Manchester City.

He said: "I see more videos with Stoke than with Manchester United.

"I saw Manchester every day in the week on television.

"But Stoke, one time, two times and I need to know more about Stoke than Manchester.

"This week, I have spent the last three days looking at the videos, how they play, who is the best player, who changes from right or left, who comes in from the right.

"And then I say to the players in training, look this player plays in this position ... we need to know this and this.

"What I know is we have some advice from last week because they played at Liverpool and got a draw."