#1 Allowing the opposition to come at them after taking the lead
Every time Borussia Dortmund took the lead, Freiburg benefited. They enjoyed the better, longer spells of sustained, productive possession against a side that didn't quite play to its strength.
It's almost as if to say Dortmund cannot play when they take the lead. We've seen them come back from behind to record stellar victories, but in recent weeks, they've been on the wrong side of the headlines.
A 2-1 lead surrendered against Freiburg and previously, a 2-1 lead was acquiesced against Werder Bremen. Not to mention, prior to these two fixtures, Dortmund let a 2-1 advantage slip too after having taken the early lead.
It's safe to claim that Dortmund are at their supreme best when they embellish the brand of football associated with their name, play with freedom and attack in numbers. It's not been the case in recent weeks, as in the quest to sustain superiority, they have allowed far too much space in the central areas of midfield and st back.