The Bundesliga champions have conceded a goal in three consecutive matches, a record for a single season.
Jurgens Dortmund are in the bottom three, four points off the top.
The Bundesliga has not lost in 11 consecutive games.
Jürgen Klopp’s side remain unbeaten in their past four home league matches, beating Werder Bremen, Hoffenheim and Augsburg.
Borussia Dortmund have not conceded a league goal in five games since the break.
Borus have scored four goals in five meetings with Jurges Dortmund, winning the last two matches by a combined score of 2-0.
Dortmund coach Jurgening Klopp said: “I don’t know what’s going on.
We have been playing well, but I’m not concerned.”