Dortmund is in big trouble after Edin Terzic resigned as head coach, his position will now be replaced by Nuri Sahin who previously served as assistant coach in the era when Edin Terzic led Dortmund. The footsteps of Edin Terzic who decided to leave Dortmund will be followed by tough defender Mats Hummels, losing these two important figures will make it even more difficult for Dortmund to navigate the competition next season. They have lost a leader who strategized on the sidelines and also a player who was a team leader on the field.
Hummels will leave Dortmund on a free transfer, he is now 35 years old but is still able to show a solid game. Previously, Dortmund had lost Marco Reus, now Edin Terzic and Mats Hummels are following in his footsteps. Losing these three important figures makes Dortmund face difficult times because they have to immediately look for suitable replacements to fill their positions.
Of course, it will not be an easy job for Nuri Sahin in the new season to handle it, starting his career with Dortmund as head coach to compete closely in various competitions. It seems likely that Sahin was prepared by Terzic, starting from becoming his assistant first. That's why, I suspect, if Terzic fails again this season he will choose to resign from the coaching chair in the BVB squad. then, recommended Nuri Sahin to become head coach to replace him. But this is just my wild assumption and conjecture, which is definitely not an easy job for Nuri Sahin to start his career managing Dortmund even though he is very familiar with the club and Dortmund's situation.
Talking about Hummels and Marco Reus, of course his role at Dortmund is very important, especially when talking about Hummels if we look at his performance and statistics. However, as we know, we can be sure that they have prepared players who will replace his role, at least as we know that Dortmund often produces talented young players. Currently, Nuri Sahin is a very young coach. We will find out about his role after the competition starts. Likewise with several coaches from other teams in the Bundesliga as competitors, several teams are coached by new and young coaches. Maybe, this way, the Bundesliga competition will be more exciting. but we can't confirm anything before this competition starts.