Few clubs in world football demand perfection in the way Bayern Munich do.
The Bavarian giants have won nine trophies including a Champions League title in the last five seasons, yet all is not quite right at the Allianz Arena.
Jupp Heynckes is back in the Munich hot seat for the fourth time in his managerial career after his superiors dismissed Carlo Ancelotti 11 matches into the new campaign.
The Italian had dropped a mere four points in the Bundesliga prior to his sacking, though murmurs of discontent among senior players are sure to have influenced his fate.
Bayern have embarked on a six-game winning streak in all competitions since Heynckes began his tenure with a 2-2 draw to Hertha Berlin, putting them three points clear atop the league table.
But even with their customary treble-winning season back on track, the German side are carrying a potentially significant issue in the form of Robert Lewandowski.
The Polish striker has been deadly as usual this term with 14 goals from 16 appearances including ten in just 830 minutes in the German top-flight.
However, immediately after giving Bayern a 2-0 lead at home to RB Leipzig last weekend, Lewandowski prompted gasps around the stadium as he pulled up, clutching his hamstring.
The 29-year-old has since cited a heavy workload as the cause for his injury, and it seems the club will look to the Premier League to address his concerns.
Prior to facing Celtic on Tuesday night, Bayern sporting director Hasan Salihamidzic told Sky Germany the club want to acquire a suitable back-up for their star man.
“It's got to be someone who can improve the team but still knows that Lewandowski is first choice,” he said, per ESPN.
According to the same source, that means Bayern are planning to rekindle their interest in Alexis Sanchez as his Arsenal contract winds down.
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The Chile international - who will be available on a free transfer at the end of the season - is eligible to partake in the Champions League despite already playing Europa League football for the Gunners.
Sanchez has been urged to join Bayern by his compatriot Arturo Vidal, but it’s difficult to tell how his arrival would affect the squad hierarchy given Lewandowski is under the impression he remains top dog.
Manchester City are considered the front-runners for his signature, suggesting there will be an almighty scramble for his signature come January, if not the summer.
Would competing with Lewandowski at Bayern be a good move for Sanchez? Let us know your thoughts in the comments.