Lawrenson isn't convinced Andrew Robertson and Kosta Tsimikas are the best options for the Reds if they want to compete on all fronts next season.
He told talkSPORT: “I think they might sign a left-back and a right-back.
“And the thing about Trent (Alexander-Arnold), going once the guy comes in, he's under pressure isn't he?
"He knows that everybody's kind of looking and thinking, are you going to be as good as Trent Alexander-Arnold? In the times he's played (Conor Bradley), he's played very, very well.”
He continued: “It's different when all of a sudden you know you're going to play every single game.
“So I think they'll sign a right-back, I think they'll sign a left-back. Left-back probably more urgently than a right-back.”
