Bayern Munich's 14-game unbeaten start to the Bundesliga season came to an abrupt end on Saturday as Borussia Monchengladbach claimed a 3-1 win over the league champions.
Pep Guardiola's team selection was boosted by the return of ex-France international Franck Ribery, who hadn't featured in over nine months due to an ankle injury.
After a slow first half, the hosts turned on the style after the break with goals from Oscar Wendt, Lars Stindl and Fabian Johnson sealing victory and three points for the third-placed side.
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The only positive to come from the defeat for Bayern was that Ribery marked his return from injury with a goal just six minutes after being called upon from the bench.
Even after winning 13 out of a possible 15 games this season, Bayern find themselves just five points ahead of rivals Borussia Dortmund, previously managed by Jurgen Klopp.
Speculation regarding the current managerial role at the Allianz Arena has come into severe question recently due to Pep Guardiola's contract still yet to be renewed.
The Spaniard has been linked with both Manchester clubs as they seek a world-class manager to propel their Premier League and European hopes.
Manchester United have been solid at the back but lacklustre going forward; City, on the other hand, have been impressive going forward but sloppy in their defensive organisation without captain Vincent Kompany.
Bayern's Douglas Costa was a noticeable absentee against Monchengladbach. Brought in from Shakhtar Donetsk for €30 million over the summer, the Brazil international has contributed seven assists and two goals so far in the Bundesliga and his attacking prowess was sorely missed.
And whilst the defeat has thrown a spanner in the works, there remains little doubt the Bundesliga title is still Bayern's to lose, despite growing pressure from below.