Granada will enter the clash in 11th place in the table, but Alcaraz has insisted that his team are not yet clear of a relegation battle.
"We have to go into all games with the same faith. We know there are games that are easier and games that are harder but there are no guarantees," Alcaraz told reporters.
"At this point of the season we know more about teams and Atletico are top because they deserve it. We think we can make things complicated for them but we have to recognise their quality.
"They're a difficult team to face but we want to win. We must try to win every game. There aren't many games left and we can't pass up any of them."
Granada have won 10 of their 29 league games this season.