Liverpool captain Jordan Henderson could be sidelined for several weeks with the groin injury he sustained against Everton, according to a report.
The 30-year-old went down with the adductor problem on the half-hour mark of Saturday's Merseyside derby at Anfield - a game that Liverpool went on to lose 2-0 in the absence of the makeshift centre-back.
Klopp admitted at his post-match press conference that the injury "does not look good" and Henderson is understood to have had a scan on it today.
While the club are yet to confirm the extent of Henderson's problem, the Daily Mail states that the Reds are preparing to be without their captain for several weeks.
The Premier League champions already have Joel Matip, Virgil van Dijk and Joe Gomez expected to be out for the season, while Fabinho and James Milner are also struggling with their own injury problems.