Chelsea boss Mauricio Pochettino is convinced by the team they're building.
Pochettino is particularly happy with his defence, which has conceded only six goals this season.
"We have good players, no?" Pochettino said. "The defence is doing well but the whole team when we don't have the ball is doing a fantastic job. The commitment is amazing. That is the start.
"If you want to be a good team and to challenge for big things, it is difficult if you are not solid in your defensive line.
"Look what happened here two years ago, Chelsea won the Champions League after not scoring too many goals but by not conceding. It is really important to have this feeling that we are difficult to beat and score against."
The Argentine added: "We are working on an offensive way to play but most important is to find the right balance.
"We arrived at a new team and with new players, so to set these principles, you need to start from scratch. You need to build the house from the foundations, then little by little you go forward."
