And the Welsh superstar is also in line to miss El Clasico too next weekend as he continues to struggle with a calf injury.
Zinedine Zidane left Bale out of his squad to face Real Sociedad on Saturday as he undergoes continued treatment.
Gareth Bale picked up the injury in the 2-1 win over Bayern, a game he was subbed off in during the second half.
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He sat out of training the day after but it appears the problem is showing few signs of improving.
Isco stepped up to fill Bale’s boots against Sociedad – scoring twice in a dramatic 3-2 win.
Gareth Bale will miss Real Madrid's clash with Bayern Munich
And it looks increasingly likely that he have to step up to the plate on Sunday when Real meet their title rivals Barcelona.
Barca are three points behind Real at the top of the table, having played one game more.
Victory would see them leapfrog Real on goal difference.
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