Denis stated: "He is a very diect player, who is very good one against one. A specific flank player of which there are not many in the squad."
The midfielder also spoke of new teammates Arthur Melo and Clement Lenglet.
He added:"They have been training with us for a week. Arthur has a bit more difficulty with the language but he is integrating well. He comes from a different football as well.
"Lenglet has been an indisputable starter in Sevilla for a year and is already more settled."