And in a post-match interview with Swedish broadcaster Viasat, the United boss also settled another score. He still needs to sharpen his fitness and intensity, but if he gets the game time, Sanchez can still be the big-game player Mourinho expected him to be when he signed him.
"Very important 3 points. and unbelievable support from the fans", the France global wrote.
Mourinho's team needed two goals in the last four minutes but are now in a fantastic position to qualify from Group H and make it into the knockout rounds.
This was not a great United performance but it was an outstanding result.More news: White House revokes CNN reporter's credentials after furious exchange with Trump
However, after Paul Pogba was brought down slightly outside the area, United were offered the chance to get back on level-pegging.
And, if you can come to Allianz Stadium and take three points from a team as good as Juve, then you have done something right.
"Probably when Manchester United had heroics here (in 2003), Manchester United was the best team", Mourinho said.
In the grand scheme of things, this was not, as Martin Keown put it, one of the club's greatest ever nights in Europe, but there were shades of the old United about it.More news: Earth's ozone layer is finally healing, UN says
But he went jogging forward into the box for Ashley Young's free-kick a couple of minutes later and caused panic in the Juve defence. Massimiliano Allegri chose to give Alex Sandro and Giorgio Chiellini a game off, saving them for Wednesday's game against United. "After their goal I think we had five minutes to wake up again but the team was there was the first minute to the last".
I watched the game with all my Juventus teammates and we were talking about whether he should have celebrated scoring against his former club.
Regardless of how well they are playing, however, it's going to be very tough for them against Manchester City on Sunday. It broke Juventus' momentum as they had been creating so many chances at the other end. That is the difference between the two sides at the moment. It was clear at times that his confidence is still low: after all, he entered Wednesday's game having scored just four times in 27 appearances, and his appearances this season have been sporadic at best. Well they would not just be my favourites for the Premier League, they are favourites for the Champions League too. With Lukaku they are more inclined to play direct, whereas Sánchez is really good at dropping deeper and linking up with the midfield and wingers.More news: Nintendo to remove offensive Native American designs from Super Smash Bros. Ultimate