Seeing how Real Madrid won over Barca in the copa del rey even though they are quite doubtful to be able to do this, will make Real Madrid's confidence even higher and Chelsea, who are the opponents, will find it difficult to withstand the onslaught Madrid in the first leg, my prediction will be a match where Chelsea will concede quite a lot of goals from Madrid without them being able to reply to any of it.
That's not entirely correct. Real Madrid playing and beating Barcelona is no guarantee that they will easily defeat Chelsea in the Champions League. The Champions League is not the same as La Liga, as proved by Chelsea's elimination of Borussia Dortmund despite their poor form in the Premier League. Chelsea has a good record in the champions league and would like to maintain that record, as would Real Madrid. It's going to be an exciting match to watch.
Chelsea is a club with quite a lot of expensive players in the transfer market but they don't have good coordination with each other, that's why any team always has a chance to beat them as well as Madrid.
Benzema will be very comfortable scoring in this first leg and a new record for him will be possible.
So much confidence you have in Real Madrid in this upcoming match against Chelsea, which, as I've said before, will not be easy for Real Madrid to win. Chelsea's chances of finishing in the top four of the league have vanished, and this may be the only trophy they fight for this season. You can imagine how serious they'll be in that game to win at any cost.