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.
Watch Serie A live in the UK on Premier Sports for just £9.99 per month including live LaLiga, Eredivisie, Scottish Cup Football and more. Visit: https://www.premiersports.com/subscribenow