Alaba, who has been in superb form this season when fit, suffered the injury when Bosnia and Herzegovina player Ermin Bicakcic landed on his left knee.

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The 22-year-old was substituted at half-time of the international friendly and it is feared he has suffered a medial ligament tear or, worse, a torn cruciate ligament.

“I’m in very, very severe pain,” Alaba said. “I can barely walk. I do not really know what’s going on.”

Alaba, who has performed a number of roles for Bayern this season, always with distinction, will be examined “in more detail” by Bayern club doctor Hans-Wilhelm Mueller-Wolfhart on Wednesday, the club have confirmed.

Austria coach Marcel Koller said: “David has problems with his left knee. He felt a pang. He is not so good.”

Alaba suffered a knee ligament injury in November in the Champions League against Roma and only returned on January 30.

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