Liverpool defender Joel Matip might be out for as many as six weeks as he needs surgery on a busted collar bone suffered within the 1-0 triumph against Napoli.
The 27-year-old landed in the closing stages of Tuesday’s Champions League match and was taken to hospital.
Liverpool already are without defender Joe Gomez, that fractured his leg against Burnley a week.
The Premier League leaders reached the last 16 of the Champions League.
They will be without Matip’s central defensive partner Virgil van Dijk for their second Champions League match, at mid-February.