the most important thing now for Chelsea is to keep winning. The first leg playing at home will certainly be more energy for Chelsea. although it was difficult Chelsea had to get the winning goal. and I hope in the second leg they don't play defensively to stem Real Madrid. instead of aiming for a draw.
Madrid with Benzema's recovery can certainly damage Chelsea's defense and midfield dominance. they have to be careful.
Chelsea did not hold their stand in this first leg. They don't need any draw, rather a win. I fully behind the blues because it's not easy for a English team to be among the quarter finals of champions league till this moment. Although Real Madrid Boss, Carlo Ancelloti and the team will be aiming for a revenge after what Chelsea did to them last season. The Laliga Giant will face blues away, and their top attacker, Karim Benzema would feature in the game. The blues needs to win this first leg, because there is no longer nothing like away goal or home goals counts. Hence, this would affect the scoring and elimination of teams in champions league.