Carroll was capped by the England under-21s last month
Newcastle United goalkeeper Steve Harper has paid tribute to striker Andy Carroll for his role in Monday's 1-0 Championship win at Sheffield United.
Carroll, 20, was an integral figure with his physical presence against a Blades side that are renowned for being tough to cope with in the air.
"Andy can be unplayable," Harper told BBC Newcastle.
"People have compared him to Duncan Ferguson and he did a great job at both ends of the pitch tonight."
Harper has watched Gateshead-born Andy Carroll rise through the club's academy system, progress into the first-team and then onto his England under-21 debut earlier this season.
Meanwhile Chris Hughton's side will be aim to consolidate their position having returned to the top of the Championship with victory at Bramall Lane.
They will be hoping for more of the same when Peterborough visit St James' Park on Saturday.
And Harper admitted getting a run together is a key aim for the players.
"Tonight we got back to doing what we were doing at the start of the season, we had a blip at Forest and Scunthorpe giving sloppy goals away.
"We went to Cardiff and won 1-0, got a good result at Ipswich and drew at West Bromwich Albion, we can be solid but if you go to teams and give away sloppy goals and give them encouragement then you're going to get beaten.
"We didn't do that tonight and you saw collectively there's a lot of people demanding high standards of each other."
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.