A statement on their website (www.liverpoolfc.com) confirmed the injury, adding "a return before the end of the season has not been ruled out".
The 22-year-old was hurt during the epic 4-3 Europa League quarter-final victory over Borussia Dortmund at Anfield on Thursday.
Can went off 10 minutes before the end, soon after Mamadou Sakho had levelled the score at 3-3 and before Dejan Lovren headed Liverpool's stoppage-time winner.
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
The German will hope to recover in time for the European Championship in France in June.
(Reporting by Mike Collett; Editing by Tony Jimenez)
