Vinicius Jr scores twice from the spot as Real Madrid beat Real Sociedad 4-1 to go top of LaLiga, extending their winning streak to eight matches.
Benfica will also be without head coach Jose Mourinho, who is suspended after receiving a red card in the first leg.
Raphinha scored twice as Barcelona won the Spanish Super Cup after an intense 3-2 victory over Real Madrid in Sunday's final in Jeddah.
Real Madrid now have 45 points from 19 matches, second behind defending champions Barcelona.
'We've hit rock bottom; we've been knocked out by a second division team.'
Real Madrid suffered a shock 2-0 loss and finished with nine men against Celta Vigo in LaLiga on Sunday.
Kylian Mbappe's second-half penalty earned Real Madrid a hard-fought 1-0 home victory over Osasuna in their opening LaLiga game of the season
Real Madrid hit their stride at the Club World Cup on Tuesday, edging Juventus 1-0 to reach the quarter-finals thanks to a second-half strike from academy graduate Gonzalo Garcia.
Real Madrid laboured to a 1-1 Club World Cup draw against a spirited Al-Hilal in searing heat on Wednesday
Images from the Club World Cup quarter-finals between Paris St Germain-Bayern Munich and Real Madrid-Dortmund.
Villarreal fought back to shock Barcelona 3-2 on Sunday, handing the LaLiga champions their first league defeat since late December.