Diego Costa: Chelsea striker says he is no angel on the pitch
Chelsea forward Diego Costa says he becomes a different person on the football pitch, adding: "Don't put wings on me, I am no angel."
Costa, 27, has been criticised for his aggressive approach but says he has achieved so much because of the way he plays and will not "change because of other people's opinions".
The Brazil-born Spain international striker believes every player changes during competitive games, doing "everything to win" for their team.
Watch more from Diego Costa on Football Focus - Saturday, 24 October at 12:10 BST on BBC One and the BBC Sport website.