Real Madrid must be able to overcome Salzburg first at the Santiago Bernabeu before playing away to Brest. It makes sense, although this is just a personal opinion, but I think Brest was very lucky in the last few games because they got slightly weaker opponents.
This match is very important for Real Madrid to determine their fate in the UCL, so they will play with high spirits to maintain their chances of qualifying through the Play-offs.
yes, RB Salzburg will be the guest team at the Bernabeu and of course in this match Real Madrid will have to really fight hard because of course if for example Real Madrid can't take 3 points from RB Salzburg then it will definitely create disaster for Real Madrid because of course RB Salzburg is the opponent. which is not too strong and if Real Madrid can beat RB Salzburg then it will definitely make Real Madrid's mentality stronger in the next match against Brest. and of course Ancelotti must really prepare everything so that he can make his team even better.
In my opinion, Real Madrid will probably be able to win, because of the bad records that RB Salzburg has had in their last few matches and again they only occasionally win matches in the Champions League, so I think Real Madrid will be able to get the full 3 points in this match, because The opponent they will face is not that strong even though this match is on paper for Real Madrid.
I don't think it's a difficult match on paper. Real Madrid is clearly the favorite. They just shouldn't underestimate Salzburg. If they play against them with contempt, they could suffer an unexpected defeat. They've suffered a defeat like this before. Real Madrid was one of the favorites for the Champions League, but they haven't been able to perform as expected in the Champions League so far. I think they'll definitely win the match against Salzburg.