If Borussia Dortmund loses this match, then perhaps they will lose their place in 4th place in the standings, because at the same time their closest competitor will face Mainz, which makes it possible for Leipzig to win the match easily. Their points gap is now only 1 point, if the scenario I said above happens then Leipzig will take over the position from Borussia Dortmund and turn ahead with a difference of 2 points.
It is very difficult for Borussia Dortmund to win in this tight match, especially since they are also in poor form at the moment. They have to work hard to win or at least secure 1 point from this match. What will make them even more pressured is that this match will also be played at Bayern Munich's headquarters. We know that Bayern Munich fans always give full support to their beloved club, and that will be a special challenge for Borussia Dortmund players when facing the pressure put on by Bayern Munich fans. A win will keep their position safe in 4th place and a loss will knock them out of their position.
I won't tell you that you are wrong now, but when we consider that the 4th place is at risk and this now a tremendously important game for Borussia Dortmund, do you remember what was at stake on the last matchday last season? It was the Bundesliga championship title and Borussia Dortmund was not able to deliver and failed miserably to win that last game. So I think looking at this game from that perspective, Dortmund hasn't changed much. The chance that they know what to do and actually do what they have to do is pretty low here whereas Bayern Munich knows exactly what to do and I am very sure that they will execute. They will not slow down until the end of the season and it doesn't matter whether the can win the Bundesliga or not. They want to use every game to stay in shape for the Champions League. No chance for Dortmund in this game is my guess.