Chelsea may need to learn from Barcelona this season on how to beat Real Madrid to qualify for the semi-finals.
Barcelona have won 3 El Clasico matches so far this season against Real Madrid (Spanish Super Cup Final, Copa Del Rey and La Liga), this is very important for Chelsea, especially about how Barcelona overcomes Real Madrid's and take advantage their weaknesses.
Chelsea may actually learn to beat Real Madrid from Barcelona but trust me they will only learn to beat the La liga Real Madrid and not the Champions league Real madrid lol. To stop Real Madrid, Chelsea will have to be flawless in their defense, not the kind of defense they put up against Everton because Everton's attack can not be compare to that of Real Madrid.