Shearer hit 260 Premier League goals over the course of his career, which stands as the highest mark in the competition's history, but he can see Greenwood surpassing that tally if he continues his current trajectory.
The former Newcastle and Blackburn centre-forward said on
BBC's Match of the Day: “[He's] a potential superstar. I respect the power, left foot, right foot, and the way he gets his shot away early, he doesn’t give the keeper a chance to set himself.
“Whether it’s near-post or far-post. Everything is power, head down and hit it as hard as you can. I was taught at
Southampton, by my old youth coach Dave Merrington, to concentrate on that right foot and make it unstoppable.
“Now, he can do it with his left or right foot. He gets it away early and the goalkeepers have no chance.
“I think in 12 or 13 years time, we could be talking about a Premier League record goal scorer. I know there are so many things that can happen in someone’s career, but I think he’s that good.”