from the H2H statistics of the matches between their meetings, Union Berlin was beaten three games by Dortmund with a fairly large score. next week, it looks like Union Berlin will be in trouble to beat Dortmund even though they play as hosts.
In my estimation, Dortmund will win this match.
Dortmund have always won their last 3 matches with a margin of more than 2 goals, so it is possible that this week will also end like that.
Union have performed well so far but with the condition of their squad now and the busy schedule they face this could be something difficult in my opinion because regardless of what if you look at Dortmund's condition from a player perspective it is clear they are better.
It seems like that people are starting to feel doubt with union against dortmund. This is the most difficult match to predict since union has a bad history against dortmund but union was still the number first. Union must win to create a gap with dortmund but im sure dortmund will not give free points for union. Dortmund seem has more chance to win this game easily against union.