Usually the leader at the top of the Bundesliga table is Bayern Munich but now the best players Bayern Munich have gone to another club so they can't afford to get another win and it's very difficult to catch up in first place again. However, Union Berlin is still not the winner of this Bundesliga because there are still several matches that might change the position of Union Berlin.
I'm not sure Union Berlin and Freiburg will consistently maintain their rankings for long. what is certain, Bayern Munich has a great opportunity to take back the top ranking of the Bundesliga, it's only a matter of time.
next week, Union Berlin will host Dortmund. of course, it is not an easy match for Union Berlin to get three points in this match. even in this match, Dortmund have the opportunity to reduce the difference in points with Union Berlin if they are able to beat Berlin in the match later.