Steve Bruce is adamant Newcastle midfielder Sean Longstaff will not be sold to Manchester United this summer.

The Magpies have slapped a £50million valuation on the 21-year-old and are yet to receive a formal offer from Old Trafford.

There is talk of United opening the bidding at £30m in the coming days, but they will not go as high as the asking price for a player who has made only eight Premier League appearances.

Newcastle boss Steve Bruce has insisted they won't sell Sean Longstaff (left) this summer

The 21-year-old has attracted interest from Premier League rivals Manchester United

Bruce, though, says Longstaff will not be leaving St James' Park.

'We don't want to sell our best young players, that's for sure,' he said. 'So that won't happen. I'm very confident (he won't go).'

Bruce is hoping to add Nice winger Allan Saint-Maximin to the £40m club-record arrival of Joelinton before the end of the transfer window.

The head coach said: 'I don't think it's on the verge of happening, but it's somebody we have looked at, it's somebody we have identified and we will see what happens.'

Nice want around £20m for Saint-Maximin but Newcastle are likely to come in at around £15m for the 22-year-old.

Meanwhile, Bruce revealed that the prospect of the club being sold was not even mentioned during his discussions with Mike Ashley, all but ending speculation of a takeover from the Dubai-based Bin Zayed Group.