Liverpool manager Jurgen Klopp accepts his players will have to suffer in the Nou Camp if they are to deny Lionel Messi the opportunity to fulfil his pre-season "threat" to win the Champions League.

Back in August the Argentina international, in his first public address as captain, told a packed stadium before friendly against Boca Juniors he and the players had made it their ambition to win the trophy for a sixth time.

They had been stung by watching Real Madrid win their third consecutive title – against Klopp's side – and 13th in all and Messi said: "Last season was really good as we did the double but we all felt bad about how it went in the Champions League.