Liverpool defender, Andy Robertson, has issued warning to Barcelona captain, Lionel Messi ahead of Wednesday's Champions League clash.
Liverpool will tackle the newly crowned La Liga champions in the Champions League semi-final first leg fixture on Wednesday night at Camp Nou.
But Robertson has now warned Messi that he has prepared to mark him out in front of Barcelona fans.
Speaking on Messi, Robertson told UEFA's official website: "I don't think you have to prepare any differently from any other game. Of course, you're playing against a better player than you usually would... he's the best player in the world.
"But I think we all need to be prepared because he drifts all over the pitch.
"You watch him, and sometimes he's back in the centre-half spot, picking up the ball from deep and things like that, so he'll start on the right but I'm prepared for him not to stay out there. But I know he'll be running at us at times, and it's all about how we defend it."
He added, "We need to defend in packs, but the problem is that it's not just him.
"If you keep him quiet, then you've got Coutinho, who we all know well, you've got Suarez and people like that who can cause you problems, so it's not about keeping one man quiet, it's about keeping the whole team quiet, and that'll be the hardest thing for us."The kick-off time for the match is 8pm Nigeria time.