Atalanta midfielder Marten de Roon says Champions League opponents Manchester City will be the toughest team they've faced this season.
City host the Oribici tonight.
De Roon said, "We prepared well to play against them, we know their values.
"We have already played against strong teams like Juve and Napoli, City has something more.
"We have to play them, then we'll see: we have to believe in our game and our qualities."
