The Germany international, who scored Real's third goal, was carried off on a stretcher after landing awkwardly late in the second half and may be a doubt for the King's Cup final against Atletico Madrid on May 17.
"He has an ankle problem and we hope that the evolution is good," assistant coach Aitor Karanka told a post-match news conference. "We have to wait and we'll see in the next few days how he is."
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