Bayern Munich suffered a shock 2-1 defeat away to Augsburg in the Bundesliga on Friday, giving Borussia Dortmund the chance to close the gap at the top.
Heading into the weekend, Bayern were the team with the highest expected goals tally in the league this season , while Augsburg had the lowest , but the champions' finishing left a lot to be desired as they aimed just four shots on target.
Bayern had it all to do after falling 2-0 down to goals from Mads Pedersen and Andre Hahn, although Robert Lewandowski at least ensured they did not go into the break chasing a two-goal deficit.
The visitors enjoyed 80 per cent of the possession after half-time, but they struggled to convert that into meaningful opportunities that worked Rafal Gikiewicz in the Augsburg goal, with Julian Nagelsmann's side slipping to their second league defeat of the season.
Despite Bayern's domination, Augsburg went in front in the 23rd minute as Lucas Hernandez only partially intercepted Iago's cross and Pedersen reacted quickest to blast into the bottom-right corner.
Thomas Mulla marked his 600th club appearance with a defeat.
Lewandowski wasted a glorious opportunity with just over 10 minutes remaining, shooting straight at Gikiewicz from around eight yards in what proved to be Bayern's final chance.
Bayern's uncharacteristic lack of ruthlessness provides Dortmund with motivation
Dortmund will fancy their chances of closing the gap at the top when they face third-from-bottom Stuttgart on Saturday.
Bayern's next match is in the Champions League as they face Dynamo Kiev on Tuesday before hosting Arminia Bielefeld four days later.