Real Madrid No2 Karanka: We won't take Sporting Gijon lightly
He says they must be at their best against Sporting, who are second from bottom of the table and seven points adrift of safety.
Karanka told AS: "Sporting beat us here last year and their position in the table is dangerous. They will have to come here to win because a draw is not worth anything, the three points are vital to them.
"We know what is at stake. It is a very important game, we did not win our last game at home and cannot fail again."