Borussia Dortmund missed the chance to restore their three-point cushion in second place in the Bundesliga after a 1-1 draw at home to Augsburg.
Marco Reus started and finished the 16th-minute counter-attack move which led to the hosts opening the scoring.
It was the first time the forward had scored in back-to-back league matches since April after only returning to action earlier this month having been sidelined for eight months with a knee ligament tear.
But despite dominating possession, Dortmund did not create many clear-cut chances and so press home their advantage.
They were made to pay 17 minutes from time when Kevin Danso was quickest to react to Roman Burki parrying his header from a corner to follow up and smash home from close range.
Dortmund second-half substitute Mamoud Dahoud still had a chance to win it four minutes from time, but planted his shot over when he should have hit the target.