Everton boss Ronald Koeman says he doesn't want to change the attitude of Dominic Calvert-Lewin.

Calvert-Lewin netted twice in the 3-0 win over Sunderland and his manager denied suggestions that the youngster needed to add a mean streak to his game.

He said: “It (being nasty) can be a positive but also a negative. He is really disciplined, he's hard-working and likes to improve.

“He listens and if you ask something of him he tries to do it with all his commitment.

“He can play in different positions. He was playing at number 9 but can also play 11, the seven or as one of two strikers.

“There are a lot of possibilities with Dominic in the team."