Courtois convinced Atletico can shock Real Madrid in derby
Atletico go into the game the form team.
Courtois, on loan to the club from Chelsea, told Marca: "We have a great team, we know how to beat them. (Playing for the) three points is (like) another final.
"As a player, you never play for a draw, you always play to win.
"There are players here who are in good form and others who are not, but I think the team as a whole can maintain the level and the spirit is good."