Former Liverpool defender Phil Thompson has admitted that he is "worried" about the threat Manchester United striker Cristiano Ronaldo will bring to the table when his former side travel to Old Trafford this afternoon.

United will welcome Liverpool looking to spark their Premier League campaign back into life following a run of three matches without a win.

Despite that, United ought to head into the contest with their tails up following Wednesday evening's dramatic comeback victory over Atalanta in the Champions League, with Ronaldo netting the all-important winner with less than 10 to go.

Although United's performance, especially in the first half, left a lot to be desired, Ronaldo, yet again, proved to be their knight in shining armour when they needed him most.

And it is his ability to come alive in big moments and big games that worries Thompson, who has admitted that he believes Ronaldo will know he needs to produce the goods this afternoon in a contest of such magnitude.

"He knows all about them, he knows how big these [games] are," Thompson told LFC TV.

"Yes, dare I say it, he worries me because this fellow turns up in big games. We have seen that for Real Madrid and Juventus.

"He has done it in different countries and he did for his own country.

"This guy is a freak of nature and I mean it so kindly. He is 36 years of age and you see him being a match-winner for them the other night with an unbelievable header. I have nothing but praise for this guy.

"Everybody is pinpointing his running stats, it’s probably the lowest of any striker in the Premier League, but it is what he produces in that box.

"If he scores goals and his running stats are down there and he keeps scoring goals in that box, everybody will forgive him.

"He will know, and he is one of those characters who will be saying we need to perform against Liverpool."

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