It was also a victory for his rival, Rafael Benitez, which lifted Newcastle, who had not won a home game in the league since October 21, out of the bottom three after slipping into the relegation places earlier in the day thanks to Huddersfield's 4-1 win over Bournemouth.
Jose Mourinho praised the manner of Newcastle's unlikely Premier League victory over Manchester United as "a attractive thing". They showed everything a manager likes to see in this game.
"I imagine that Rafa Benitez is more than pleased with the efforts of his players". Were they lucky? Yes, they were, yes, they were. "They fought like animals", he said.
However, Mourinho was far more eager to give his verdict on Newcastle's players and left nobody in any doubt he was impressed by their response to dropping into the bottom three in the wake of good results for their relegation rivals. "After a few defeats Sir Bobby once told me: 'Don't feel so sad, think about the happiness of the other team, '" Mourinho recalled.
"I'm serious, I prepare myself, I'm really happy".
"Obviously I'm very disappointed with the defending on the goal; we missed the challenge in the air".
"I think to an extent he is bound to be targeted by defenders because he is a talented player and an obvious danger to opponents".
It was the closest Mourinho came to criticising his players in a surprisingly composed assessment of one of their worst performances of the season.
Huddersfield's first league win in nine matches was marred by an injury to Australia midfielder Mooy, who was stretchered off with a knee problem 15 minutes from time.
Mourinho said: "First of all Newcastle players and staff, they gave what they have and what they don't have and that is the lovely thing in football".
Benítez said: "Hopefully I'll have bigger wins than this one with Newcastle".
"Against a top side, you have to play in this way".
"But it wasn't because they won that we needed to win".