Chelsea boss Mauricio Pochettino wants to bring a ruthless streak to his team's play.
Pochettino believes his young players must be more cynical in their play to earn results.
He said: At the moment my feeling is bad because we are playing well, we are showing everyone we can compete and dominate teams like Liverpool.
But at the end we need to be more, I say competitive because I don't want to use another word we need to be a bit more naughty on how to win.
We need to be more aggressive in this type of situation.
We cannot give chances like the teams we only concede one chance to and they score one goal. If you see the data, we are very good in possession, construction and building.
Only what we are missing is to score goals. That's the most important thing in football."
The former Argentina defender, 51, continued: I was really naughty, the worst!
I was the most competitive but without the quality that we have in this team."
Tapping his head, he added: They are much better than me about quality but here I was stronger than them.
Sometimes you need to show more this quality, this mental strength, to have this experience to better deal with some circumstance in the game. Sometimes it's not about only talent.
I need to translate this idea. It's a joke, always we joke about that.
Always with the coaches we think we are better than everyone."