Mourinho’s introduction of Anthony Martial in the 70th minute, proved to be a masterstroke, as the France international netted the winner with 10 minutes left.
He celebrated at full-time by putting his finger to his lips in a gesture that told everyone “I know what I’m doing”.
Asked what he meant by the signal, Mourinho retorted: “Calm down, relax a little bit. Don’t be so nervous, relax.
“I don’t understand some reactions when people question “Are they Red Devils?” Our two strikers were up against amazing central defenders today, some of the best in Europe.
“Martial plays the same position as Marcus but is more comfortable dropping in between the lines and driving with the ball as well as attacking space. I told him to do that when he came on and to play from Lukaku.
“He was against three very good defenders but they’d had a hard match for 70 minutes.
“Maybe it was a lucky shot but his desire was good and the goal gives us two more points than 0-0. It was deserved.”