Alexis Sanchez and Ander Herrera gave the Red Devils a win over the European champions in their final U.S. tour fixture at the Hard Rock Stadium in Miami, ahead of the upcoming 2018/2019 English Premiership season.
Alexis Sanchez and Ander Herrera were on target in the first half while Karim Benzema pulled one back for Real in the 45th minute.
Mourinho's reportedly an unpopular figure with his players after repeated public lashings, but on Wednesday, he was full of praise for most of his senior players.
Madrid were stepping out on the field for the first time this pre-season and they, unsurprisingly, looked off the pace and sluggish at times compared to United - playing their fifth match.
White jerseys aggressively charge him down at the edge of the area and, rather than lump clear or panic in any way, Pereira sent them all for a Snickers and rolled the ball to another team mate in a better position.
Mourinho again asserted that too much shouldn't be read into the result, chiefly because of the limited personnel available to him. "I know that the kids are really young, I know the kids need time to grow up, I know my players gave everything". Marco Asensio, Isco and Toni Kroos all made late appearances off the bench.
United kept possession and one piece of brilliance created spare men to go and attack with.
They open the 2018/19 Premier League season with a home fixture against Leicester City on August 10.
United landed in Manchester on Wednesday morning to begin preparations for their final friendly against Bayern Munich in Germany on Sunday and the start of the Premier League season against Leicester at Old Trafford on August 10.