Newcastle's second offer for Crystal Palace's England defender Marc Guehi has been turned down, with reports suggesting the bid was around £50 million.
Negotiations are continuing between the clubs with Newcastle considering another offer.
The key factor in talks is Guehi's remaining contract length. He is 18 months away from discussing pre-contracts with teams abroad and two years away from leaving on a free.
Crystal Palace value Guehi at £65m.
Eddie Howe has made centre-back a priority target this summer and Guehi fits the profile of what he is looking for - right-sided, but someone who can also play on the left.
TrendingThe England international's potential transfer fee would be considerable given his growing stature in the game and the fact he has two years left to run on his contract.
Newcastle still have to be conscious of PSR, meaning if Palace's demands become too high they may have to rethink their pursuit of Guehi.
Sources with expertise in the transfer market have pointed towards Everton's demands of upwards of £60m for his England team-mate Jarrad Branthwaite as the kind of price range for Guehi.
Branthwaite - also one of United's targets - did not make the final Euros squad, while Guehi played all but one of England's seven tournament matches in Germany.
If Guehi is to end up staying at Crystal Palace this coming season, it has not been ruled out that he could also sign a new contract at Selhurst Park.
The 2024 summer transfer window officially closes on August 30 at 11pm UK time in the Premier League and 11.30pm in Scotland.
The Premier League has brought forward Deadline Day to link up with the other major leagues in Europe. The closing dates were set following discussions with the leagues in England, Germany, Italy, Spain and France.