The match between Real Madrid vs Chelsea will be the most interesting match in this round. It is because both teams almost have the same strength or have almost the same players' quality in each line. That's why we will be difficult to predict the result of this match. I assume both teams have the same chances to win, Real Madrid 50% and Chelsea 50%.
Sure, if there are some key players of Real Madrid injured, it will be a big problem. Especially for Benzema, this man must play in this match because Real Madrid relies on him to score. If Benzema is injured, I bet Chelsea to win and qualify to the next round.
No doubt this is going to be the most interesting match of this round with both teams have few very exciting players well experience in this competition, but Real Madrid is having some better performance, and they are improving their quality for end of this season and Chelsea is fighting hard in Premier League with losing top slots and now trying their best for staying at third spot is not good for them.
With this all now we have to wait for some more days as Benzema is surely key player and mostly have some injuries on crucial matches, hopefully now we will not have this case after few days we are going to International matches break, and then we are expecting very good competition for these round matches here in Champions League.