Pressure is mounting on head coach Niko Kovac as injury-hit Bayern Munich look to beat minnows Union Berlin Saturday with just two points separating the top nine Bundesliga teams.
Third-placed Bayern are only a point behind leaders Borussia Moenchengladbach, having been knocked off the top three weeks ago when Hoffenheim grabbed a shock 2-1 win at the Allianz Arena.
Union Berlin, in 14th place, have already beaten top-six clubs Dortmund and Freiburg in their first Bundesliga season and hope to deny Bayern a first win in three league games.
Club chairman Karl-Heinz Rummenigge branded Bayern "careless" in Tuesday's 3-2 Champions League win at Olympiakos and called on the team to beat Union at home to "meet the standard FC Bayern has set" by regaining first place in the league.
However, a worry for Kovac is Bayern's trend of conceding exactly two goals in each of their last five games, on top of their defensive woes with first-choice centre-backs Niklas Suele and Lucas Hernandez out long term.
Suele could miss the next six months after tearing his cruciate ligament in Saturday's 2-2 draw at Augsburg, while Hernandez underwent surgery on Thursday for ankle ligaments torn in Greece.
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Sport Bild is tipping Ralf Rangnick, sports director at rivals RB Leipzig, to step in if Kovac is fired.
The magazine claims time is running out for Kovac, 48, as Uli Hoeness, his chief supporter among the club's senior figures, stands down as club president next month.
However, Union's head coach Urs Fischer refuses to perceive star-studded Bayern as vulnerable.
"We can try to force mistakes from them and if you make it easy for them, you are going to have problems," said the Swiss.
With a phenomenal 18 goals in 13 games, Bayern striker Robert Lewandowski can claim a new Bundesliga record of scoring in each of the first nine league games if he hits the net.
"It's not just about Lewandowski," added Fischer.
"Obviously he's a top striker, on one hand, you have to be brave in one-on-one challenges with him, but it's also a team effort to defend."
"I have to make sure we all keep our feet on the ground."
One to watch: JonJoe Kenny
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