#3 Cristiano Ronaldo vs Medhi Benatia
Another player Juventus desperately missed in the first leg of the quarter-final was Medhi Benatia. The 30-year-old centre-back's absence prompted Allegri to start 36-year-old Andrea Barzagli who simply could not contend with Cristiano Ronaldo in the box.
The Portuguese forward scored twice on the night - the first that came from quick movement in the box while the second was a bicycle kick that was one of the greatest goals of his career.
With Giorgio Chiellini possibly kept busy by Karim Benzema, it will be up to Benatia to keep Ronaldo in check. That is easier said than done and he will need the help of both Mattia De Sciglio and possibly Sami Khedira to reduce the space available for Ronaldo to operate.
But ultimately, Benatia will be the one to deal with Ronaldo when he does attempt shots on goal. He will have to close him down when he is in the box and possibly mark him on set pieces too unless Chiellini is tasked with marking him.
Also read: Juventus 0-3 Real Madrid: Tactical Analysis - Ronaldo masterclass ruins Allegri's plans