Manchester United are preparing a bid for Newcastle midfielder Sean Longstaff, according to Sky sources.
United boss Ole Gunnar Solskjaer has already signed two home-grown youngsters in Daniel James and Aaron Wan-Bisaaka and says the club are still working on more summer transfers.
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Longstaff caught Solskjaer's eye last season after breaking into the Newcastle first team. The 21-year-old made 13 appearances, nine in the Premier League, before a knee ligament injury in March brought a premature end to his campaign.
However, Newcastle insist Longstaff is not for sale and Sky Sports News has been told he will cost Manchester United more than the £50m they spent on Wan-Bissaka.
Longstaff is a product of Newcastle's academy system and had loan spells at Kilmarnock and Blackpool before making his first-team debut in the Carabao Cup defeat at Nottingham Forest last August.
He signed a new contract at St James' Park in December that runs until 2022.
Newcastle are currently searching for a new manager after Rafael Benitez left when his contract expired on June 30 to take charge of Chinese Super League club Dalian Yifang.
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