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Emre Can and Adam Lallana will both meet up with their separate national sides this week despite neither being involved at the finish of Liverpool's impressive 5-0 win over Watford at Anfield.

Can was replaced by James Milner halfway through the first half while Lallana was left out of Klopp's squad altogether in freezing conditions as Mo Salah ran riot.

The midfielder will join up with Germany this week for pre-World Cup friendlies with Spain in Düsseldorf on Friday and then Brazil in Berlin four days later.

Lallana will be with England for their games with the Netherlands and Italy on the same days.

Asked about Can's issue, Klopp said: "Back. He doesn't think - and I don't think - it's too serious but it was too serious to continue.

"He had that problem a little bit during the week, we gave him one day extra recovery but he thought it would work and he trained normally yesterday.

"It was one header and maybe because of the temperature - it's a muscle thing. It should not be that serious.

"He will go to the national team I think and will have treatment there. Their game is not tomorrow and we will know more then but should not be an issue."

(Image: Andrew Powell/Liverpool FC via Getty Images)

Klopp also said there was no fitness issue behind Lallana's absence from even the bench at Anfield.

"If today was the last game of the season Adam could have played but it isn't so we gave him the opportunity to get fitter and fitter and fitter," he said.

"Sitting outside tonight in these temperatures and not starting is not big fun for anybody, and then you come on or not.

"I spoke to Gareth Southgate and Adam spoke to him. So it should be clear that Adam will be 100% for the national team."

Lallana's injury-ravaged season has seen him start just three games this season, the latest the goalless draw with Porto at Anfield.