Atletico Madrid coach Diego Simeone has urged his side not to lose focus against Zaragoza as he expects a tough clash.
Atletico are second in La Liga, 11 points behind pace-setters Barcelona, while Manolo Jiminez's men are hovering mid-table in La Liga.
But the Argentine trainer has warned his team not to expect the encounter to be a formality, and to be wary of their opponents if they want to keep their winning league record at home intact.
"It will be a tough match," he told reporters.
"They are strong opponents and do well away from home.
"We have to be vigilant against them because it is an important game.
"You have to congratulate (Manolo) Jimenez for what he has done at Real Zaragoza. He is a brave guy and has done well with a good group.”
Zaragoza have won their last three away games in all competitions against Rayo Vallecano, Levante and Athletic Bilbao, respectively.