Liverpool legend Jamie Carragher has warned manager Jurgen Klopp it is now "paramount" he sign a centre-back in the January transfer window.

Carragher has appealed for a defensive signing ever since Virgil van Dijk suffered a serious knee injury.

With another injury to Joel Matip, picked up in the 1-1 draw with West Brom, Carragher has said his old club "have to" be active next month.

"It's a massive worry but it's not a new worry," he told Sky Sports. “Joel Matip will not play every game between now and the end of the season, you know that even before the injury today and that's why it's paramount Liverpool sign someone in January.

“I said that as soon as Virgil van Dijk has his injury against Everton. I mean, Fabinho has gone there and looked like a top class centre-back so maybe people at the club felt like it wasn't as urgent.

“But Joel Matip is just too injury prone, his body can't take the rigours of playing Premier League football week in week out. We know that since he joined."