#1 Impotence in the Barcelona attack
Despite the absence of Lionel Messi, Barcelona still had enough firepower in their attack to trouble the Dortmund defense. However, rather worryingly for Valverde, his forwards failed to hit the heights expected of them.
Ansu Fati was handed his second start in a Barcelona shirt but he could not keep up with his superb form and was largely an anonymous figure for the entirety of his 59-minute stay on the field.
Other than an attempted flick, Luis Suarez failed to test Roman Burki in the Dortmund goal, while Antoine Griezmann continued his away day blues in the colors of Barcelona.
Messi's introduction with half an hour to go helped add urgency to the Barcelona attack. But, even the club's greatest player could not serve as an inspiration to what was a very inconspicuous Barcelona attacking display.
In total, the Blaugrana managed just five shots, with one of those being on target and given their shocking impotence in attack, Barcelona can count themselves lucky to leave Germany with a point.