I think these two clubs are in a very strange position for Mason Mount, Chelsea knew that their centre-forward Mason Mount was not going to renew his contract at Chelsea and Manchester United had already made two offers which were both rejected by Chelsea because a price had not yet been agreed.
Chelsea wants a price of € 60.00m-€ 65.00m, while Manchester United is rumored to be making a third offer which is also still below the price set by Chelsea, what the two clubs have done is at stake for Mason's career, if there is no agreement it is very likely that next season he will more on the Chelsea bench because usually clubs don't like players who have expressed their desire to leave the club.
https://twitter.com/FabrizioRomano/status/1672158138093518848