And, despite the impending battle, Mourinho was welcomed into Sir Alex Ferguson's inner sanctum prior to the 2-0 win, a sign of just how much affection the pair hold for each other.
"I feel privileged about that because he is such an important person in the world of football and, more importantly, he is good person," said Mourinho.
"I have always had a fantastic relationship with him and I am proud of it.
"Of course, I want to win and he wants to win, but I believe the loser will have a little bit of space to feel a little bit happy because of the friendship.
"But make no mistake, I want to win."