Bayern Munich manager Jupp Heynckes fears he may have lost Toni Kroos for "a long time" to injury after the young forward was forced off during the club's 2-0 victory over Juventus in the Champions League.
Kroos was forced to sidelines in the 16th minute with his side 1-0 up against the Italians and would not play any further part as the Bavarians took a giant step to qualifying for the semi-finals.
"An initial diagnosis by FCB chief medical officer Dr Hans-Wilhelm Muller-Wohlfahrt suggests the Germany international has ruptured a group of adductor muscles in his right hip and now faces several weeks on the sidelines," a statement on Bayern's official said.
Heynckes admits he is worried that he has lost one of his most influential players at a critical point of the season.
"This is obviously very bitter, " Heynckes said. "It's just such a shame for a young player who has played great this season."
Information from the Press Association was used in this report