With Gareth Bale missing the contest, the bulk of the attacking duties will fall to Cristiano Ronaldo. Fortunately, he's one of the best players of all time, so that's not a big issue for Real Madrid. After a lengthy goal-scoring drought (by Ronaldo standards), the Portuguese bagged a second-half brace against Bayern in the first leg.
He rested over the weekend rather than feature in La Liga, so he'll be chomping at the bit to get back in the action. If Real Madrid play conservatively and invite Bayern's pressure, it'll fall on Ronaldo to make the Bavarians pay. The chances to score might be tough to come by, but he's back in form and there's every reason to believe he'll capitalize.
Also read: Late Ronaldo goal secures Real win