Mourinho is notoriously picky about choosing which shirt numbers players wear and by handing Rashford the number 10 jersey it may indicate he is planning a bigger role for the forward this season.
"My CEO knows what I want for quite a long time", Mourinho told German TV ahead of the game.
Speaking before United's 1-0 defeat to Bayern on Sunday night, the United manager admitted his concern for the coming campaign if his squad is not bolstered before the Premier League kicks off with Leicester's visit to Old Trafford on Friday. I still have a few days to wait (for) what is going to happen.
Yerry Mina (Barcelona) and Willian (Chelsea) are among those to be linked with a move to Old Trafford. Today, United are ready to make a mega move for Willian...
And journalist Christian Falk, who works for German newspaper Bild, claims United contacted Bayern over a deal for Boateng on Sunday.
West Bromwich Albion’s Salomon Rondon is set to join Newcastle on Monday reports say
In the absence of many first-team regulars, Mourinho's men sat deep in a passive performance, which was a departure from the earlier scenes at Wembley Stadium, where Manchester City and Chelsea both employed high presses to varying degrees of success in the Community Shield. But all five have had their injury issues and have also been prone to errors.
The Red Devils have balked at asking prices for several world-class defenders this summer, with Tottenham Hotspur demanding £70 Million for their star defender Toby Alderwield and Leicester City placing a £65 Million tag on Harry Maguire's United jersey.
The latest episode between the pair stirred up speculation that the France worldwide would seek pastures new ahead of the new campaign, however the Red Devils' attempts to replace the forward have hit a snag.
It was in contrast to Anthony Martial, who, according to ESPN FC sources, was left behind in Manchester to do double training sessions after leaving the tour of the United States to attend to the birth of his son.