Chelsea boss Thomas Tuchel has detailed what he seeks in a new signing.

He explained that he even uses personality traits to help him decide which roles his players may thrive in.

"Curiosity is a huge drive for these players because some of them are driven by a certain aggression – and by aggression, I don't mean only in duels, but aggression for status, for being the captain, for being famous, being in the headlines," he told the Chelsea matchday programme.

"This is also very common. So I have to think about that kind of aggression, and about their curiosity, and the third drive, which is to belong to a group and feel the connection to their team-mates. We all have all three of these drives in us all the time, but each person has a different level of each, where one is more dominant, and it has a huge correlation with deciding where to put them on the pitch.

"You see, for example, the number 10s, the creative guys – they are very, very curious. You see the captains, and they impose a certain aggression towards winning, towards status, with a desire that is very positive. Then you get these guys who love to be in the group, love to work for others, who have this, like, water-carrier mentality. They love to make things easier for everybody – they love to be in the group, they don't need to be doing interviews, don't need to show anything. They just do their thing, make it easier for the others."