"Following the Levante game, we had some injury worries about Pepe, so we'll wait for tomorrow and then see," he told reporters on Monday. "Albiol may play instead of him.
"We expect a sold-out stadium with a very intense environment tomorrow. Although the fans could be intimidating, my players and I thrive in that kind of atmosphere.
"If we lose 2-0 or 3-1 tomorrow, even though we will progress, I won't return home a happy man. I want my team to win."
Madrid won the first leg 3-0 at home last week.