Liverpool boss Jurgen Klopp admits Emre Can's injury is a concern after victory over Watford.

Can had to be withdrawn midway through the first half of the Premier League clash on Saturday evening, which the Reds won 5-0 to rise to third in the table.

“[It is a] back [injury]. He doesn't think, and I don't think, it is too serious but it was too serious to continue," said Klopp after the game.

“He had that problem a little bit during the week; we gave him one day of extra recovery. But he thought it would work and he trained normally yesterday.

“It was one header and maybe because of the temperature in the muscle – it is a muscle thing. But it should not be that serious and he will go to the national team I think, and have their treatment. Their game is not tomorrow. Then we'll know more, but it should not be an issue."