Former Liverpool defender Jose Enrique says Darwin Nunez needs to improve his focus.
Nunez saw red against Crystal Palace earlier this month.
Enrique told BoyleSports Premier League, "When you look at Erling Haaland, he's a bit like Cristiano Ronaldo in his mentality where nothing affects him.
"Darwin Nunez is different and I remember in the summer when he reacted to criticism by putting a 'Shh' emoji on Twitter.
"In terms of ability, I love Darwin and he's got that Uruguayan mentality where they just keep fighting. The only doubt is whether he'll be able to handle the price tag and just perform. If he can't, he'll struggle."
