I see Barcelona and Bayern Munich are in the same group, will we see this tragedy again? 
According to my prediction, first they will meet Atletico Madrid, second will be Arsenal, third will be Liverpool, the last one is obviously the strongest because they can reach to final stage.
UEFA has always been giving Real Madrid more difficult oppositions, I don't think it's coincidence because it's already getting out of hand. If you look at the draw results and the table above. As usual, Real Madrid is in a difficult table, and Barcelona is in an easy table, and many people still say that Real Madrid won the UCL because of luck. I am still surprised by people who say that Real Madrid is always lucky in the UCL league, even though if you look at previous seasons, Real Madrid has always gone through a difficult path, as well as this season.
Real Madrid is really unfortunate in this season, they already met strong teams in qualification, now in knockout they will meet strong teams in every match.According to my prediction, first they will meet Atletico Madrid, second will be Arsenal, third will be Liverpool, the last one is obviously the strongest because they can reach to final stage.
Real Madrid faced Manchester City in QF, Bayern Munich in SF that's not really a problem though.
Two seasons ago Real Madrid faced Manchester City of which they were eliminated by City.
Three seasons ago, Real Madrid faced PSG in R16, Chelsea in QF, Manchester City in SF and Liverpool in the finals.
Real Madrid has always been going through difficult teams.