And that appears to be the case, with sources telling ESPN FC that a move for Bayern Munich's Jerome Boateng appearing more likely as negotiations for Maguire and Tottenham's Toby Alderweireld growing more hard, despite reports over the weekend that United were making progress.
However, with speculation surrounding Anthony Martial's immediate future, and several others sitting out the club's entire pre-season, it is unclear whether United will be in a much stronger position when they open their domestic campaign against Leicester.
Martial moved to Manchester United in an initial £36m deal from Ligue 1 side AS Monaco in the 2015 summer transfer window under Mourinho's predecessor Louis van Gaal. "We play for points and it's with the players we have", Mourinho told MUTV.
Kohli should take some responsibility for Indias loss: Hussain
But one thing that really stands out for me is that inner drive and determination from this group of players. If we stayed calm and trusted all the previous areas we'd been bowling then we'd get our rewards.
"The players were, once more, brilliant".
Zlatan Ibrahimovic was the temporary wearer of the number 10 shirt at Manchester United after Wayne Rooney left a year ago; but it was revealed this afternoon who the new occupant of the shirt will be.
He desperately needs a new centre-back but United are facing defeat in their efforts to prise Harry Maguire from Leicester and have yet to make a formal offer for Barcelona's Yerry Mina. "If we do not make our team better it will be a hard season for us".
"He always wanted it", Mourinho said. Of course, he was in the shadow, waiting for the opportunity and now the shirt is empty. "It's something fantastic for the kid, let's give the shirt to him".