Bayern Munich boss Niko Kovac questioned his side's attitude after they needed a stroke of luck to edge past second-tier strugglers Bochum 2-1 in the DFB-Pokal on Tuesday.
Bochum have not won at home since May and only goal difference is keeping them from the foot of the 2. Bundesliga table.
That meant 19-time champions Bayern were huge favourites in the second-round clash, but Alphonso Davies' first-half own goal had them on the brink of elimination.
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Kovac's men needed an 83rd-minute equaliser from Serge Gnabry to finally take control of the match and, after Armel Bella-Kotchap was sent off, Thomas Muller scored a late winner.