Arjen Robben has been ruled out for the rest of Bayern Munich's season, while Robert Lewandowski appears set to suffer the same fate.
Bayern's injury-hit state has been in the headlines in recent weeks, with long-time club doctor Hans-Wilhelm Muller-Wohlfahrt quitting over claims his medical team had been blamed for the defeat to Porto in the UEFA Champions League.
Pep Guardiola's side overcame a 3-1 loss in Portugal to win 7-4 on aggregate and set up a semi-final with the head coach's former club Barcelona, but they will enter that tie without their two top scorers.
Robben tore a calf muscle in Tuesday's DFB-Pokal semi-final defeat to Borussia Dortmund, while Lewandowski suffered a fractured jaw, a broken nose and concussion in a heavy challenge with opposition goalkeeper Mitchell Langerak.
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