Real Madrid are very strong when they compete in the Champions League stage while Chelsea are currently having problems with their internal team, I think that it is very likely that Real Madrid can win here and advance to the next round.
Talking about the mentality of the Real Madrid team, there is no doubt because they are the team that has won the most Champions League titles of all time and of course against PSG is clear evidence that their mentality can beat PSG's star players.
Real Madrid's victory over PSG is indeed proof that Real Madrid is one of the teams that deserve to be a candidate to win the Champions League. They lost in the first leg but managed to turn things around in the second leg, so it can be said that Real Madrid really has a good mentality and of course, the effort that goes with it.
Meanwhile, Chelsea, even though they are having internal problems but it can't be denied that they are in good shape now and Thomas Tuchel has a good record against Real Madrid. It will be difficult to guess who will be the winner because both teams are great, but I think the team that can be consistent and makes fewer mistakes, then they will be the winner.
After all, Chelsea is currently the holder of the defending UCL title and also, in the previous season Chelsea managed to get rid of Madrid in the semi-finals until Chelsea finally won the UCL title last season. Now in the quarter-finals, Chelsea will play again against Real Madrid and of course Chelsea have the motivation and ambition to make this good record continue. But yes, as well as Real Madrid, as a big team they will not give up and will try even harder to beat Chelsea as a way of revenge. With the motivation and ambition of these two teams, of course the match will be tight, I personally find it difficult to predict something like this because both have a chance to qualify.