"Our season is on the line," Iniesta, 29, said.
Atletico eyes Champs semifinals at Barca expense →
"The Germans have played a brilliant World Cup so far," Iniesta said. "We're also at the top of our game, I think. It will be a game between two rivals who enjoy having the ball and I think it will be a beautiful battle."
World Cup: Villa gives Spain 1-0 win over Paraguay →