"We don't have a coaching problem," defender Marcel Schmelzer commented. "It is our players, who are to blame. We are responsible for the problems," Dortmund captain emphasized. The 29-year-old demanded a good result against Tottenham as "a victory would change things to a positive direction."

2017 World Champion Mario Goetze is demanding more effectiveness in front of the goal and man-to-man duels.

While players back their coach in official statements, former German international Matthias Sammer is convinced a vital problem is "the teams' lack of robustness." An underdog team such as Stuttgart managed to down a team of superior quality and interrupt their forwarding game.

So far Bosz could not deliver appropriate answers. His team is struggling with his tactical system. Easy mistakes come along with problems of the defense as a simple long ball is enough to crush Borussia's back-row. Bosz complains "how easy opponents can score a goal."

But Bosz's current difficulties are not only caused by his ambitious attempt to implement a risky new tactical system but from hangovers from the past.

The troubles around star striker Pierre-Emerick Aubameyang are to some extent unpleasant leftovers from his predecessor Thomas Tuchel. Tuchel and the club leaders created favors for the Gabon rooted 28-year-old to keep him in a good mood.

Hit by a crisis (476 minutes without a goal), Aubameyang insists on enjoying his favors such as trips and parties in Italy and France. On the other hand, the striker doesn't bother too much about being late for training, which is affecting the team's balance.

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