The DFB had anticipated a different outcome in their match against Turkey in Berlin on Saturday evening.
Intending to spark heightened enthusiasm ahead of the upcoming European Championships next year, Germany failed to set fans' hearts alive with a 2-3 defeat at the Berlin Olympic Stadium.
Kai Havertz opened the scoring just five minutes in, despite taking up a new role at left-back, though instead of a compelling performance against Turkey, the national team experienced a disappointing defeat.
Arsenal fans were left in shock at the move from Naglesmann, as the £65million summer signing from Premier League rivals Chelsea has scored just once since the start of the season.