For me the chances of FC Chelsea to advance into the next round are just as slim, or even non-existent, as the one of Bayern Munich tomorrow. While FC Chelsea is "only" 2 goals behind against Real Madrid for me the performances of Chelsea in the last few games were even weaker than the ones of Bayern Munich. Real totally dominated them in the first leg and could have scored even more goals, while Bayern Munich was at least at the same level with ManCity until they conceded the second goal, after that they completely fell apart.
That being said, this is football and if Chelsea is able to go into the halftime break with a 1-0 lead then everything is possible again because even Real will get nervous when they are in the 80th minute with a 1-0 for Chelsea.
More so, looking at Chelsea's formation tonight it doesn't look like a team that is here to win tonight