"The league is no longer in our hands," Mascherano told club's official website. "I don't think the defeat in the Champions League affected us, we created a lot of chances, but the ball didn't want to go in.
"But we can't make excuses. I think we created chances to score, but football can be like this."
"We have to pick ourselves up and look forward because on Wednesday we have a final and we cannot fail."
Barcelona take on fierce rivals Real Madrid in the Copa del Rey on Wednesday evening.