The German midfielder insisted that him and his teammates managed to turn the situation around after beating Barcelona 3-1 at the Camp Nou in last Saturday's Clasico.
"Against Cadiz, no one played to their level," Kroos said at his Champions League presser ahead of meeting Borussia Monchengladbach. "I'm the first to admit that. If you play like we did, you'll lose to a fourth division team.
"Against [Shakhtar] Donetsk we lacked confidence after their first goal, but sometimes that's the way it is. But we never give up, as it was seen on Saturday, we try to change our situation, but everything is fine as we won an important match.
"Tomorrow is a final and we have to play better than Saturday to beat Borussia."