Looking at all the teams in the quarter finals I think Real Madrid are the team with the biggest chance to win the Champions League this season. They will face Arsenal but it doesn't seem like a problem for them. If they make it to the semi finals then they will most likely face PSG assuming PSG can beat Dortmund. I think it is almost 100% that Real Madrid will at least play in the UCL final this season. I am not underestimating teams like PSG Dortmund or Arsenal but out of those four teams it seems like none of them have a chance to challenge Real Madrid. And in the final they will most likely face Barcelona, Bayern or Inter. If they face Barcelona I think it will be a tough game but Real Madrid rarely make mistakes in finals. And out of all the best teams in the quarter finals I don't think any of them have the winning mentality like Real Madrid.
This was the same strategy that kills Liverpool when they met with PSG that led them to loss, people are not looking at the bigger picture and that is going to affect Real Madrid later or sooner. Look at Real Madrid place in the Laliga, how many points have they have with lead? It's obvious they are struggling, they don't have game plan because of they do, Atletico Madrid match wouldn't have gone to the penalty kick but they expose their defense, that's what they have been doing.
If they repeat that with PSG, they will penetrate them like it's nothing. They did that to Liverpool and that's how they were able to equalize and went straight to penalty. The current PSG has a game plan, look at their domestic ligue1 league, they are the baddest in the top of their table, they might not get enforcement like other clubs do just because Messi, Neymar and Mbape left but that doesn't stop them from winning their Champions League without them, it does happen.