Alexis Sanchez has been diagnosed with a thigh injury and is expected to miss the Europa League semi-final between Inter and Shakhtar Donetsk.
That clash is due to take place on Monday evening as part of the Final Eight tournament in Germany.
A statement from the club confirmed a slight strain of the hamstring in his right leg.
His condition will continue to be evaluated over the next few days.
It is unlikely the Chile international will recover in time for the semi-final.
Sanchez had come off the bench during the 2-1 quarter-final win over Bayer Leverkusen on Monday and immediately picked up the injury, although he stayed on until the end with heavy strapping to his thigh.
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