Chelsea manager Maurizio Sarri wants his side to stop making silly mistakes.

The Blues were rocked at home at the weekend as they lost 1-0 to Leicester City.

It is a result that further showed how far behind the top teams they are right now.

But Chelsea are still favorites to finish in the top 4. And their boss knows they must start getting results again.

"Of course, we will prepare a video about the match," said Sarri in his pre-match press conference.

"For every match, we prepare a video after the match. We will prepare individual videos, the individual mistakes.

"I want to speak with the group first of all, then I want to speak with three, four, five players. I don't know how many at the moment.

"Of course we have to do everything just in order to avoid the same problem in the future.

"The [Watford] match is difficult, we know very well. We have to study very well these kinds of opponents."