By North-west correspondent Alex Stevens

Jurgen Klopp has revealed that he will need to act in the January transfer window after Liverpool’s latest injury setbacks.

The Merseysiders’ casualty list lengthened to 12 players in the wake of Tuesday’s win over Stoke and Klopp has been left with no fit centre-backs after Dejan Lovren and Kolo Toure joined Martin Skrtel and Mamadou Sakho on the sidelines.

Speaking on Thursday, the Liverpool manager revealed that Philippe Coutinho is out until February with a hamstring strain, while Lovren will also miss next week’s marquee Premier League matches against Arsenal and Manchester United with a similar injury.

“The truth is that we have to react on the situation,” Klopp said at his media briefing on Thursday morning. “It is difficult enough to find quality players, who are in a difficult situation at their own clubs. We have our eyes open in the transfer market.”

Klopp, whose injury-ravaged team face Exeter away in the FA Cup on Friday night, is concerned at the growing number of players unavailable for selection as the team struggle to cope with a heavy schedule of fixtures.

Philippe Coutinho became the latest Liverpool player to break down with a hamstring injury

Body blow: Coutinho is set to miss Liverpool’s matches against Arsenal and Man United

The Liverpool manager also spoke about recalling more players from loan as he explained why he preferred youngsters to develop at their own club.

“We take back our own players [Ojo, Ryan Kent and Ilori],” said Klopp. “Especially if they are not in the perfect situation at clubs where they are on loan.

“These are our players. We will speak about this next summer, in my opinion best talents should be at your own club and play together in the U21s as a team.

“It’s a big chance. But no pressure because they are still young. If they do well they can make the next step but if not they have time.”