Tottenham striker Tere lost his penalty shootout and was racist in social media after the game. Tottenham official statement: "We are disgusted by the racism that Tere suffered on social media after his defeat in the European Super Cup last night.
Mattis showed courage and responsibility to stand up and take the penalty, and those who abused him were nothing more than cowards - they hid behind anonymous usernames and profiles and promoted abominable views.
We will work with authorities and social media platforms to take the toughest actions against any individual we can identify.
We are with you, Mattis!"