"Against Juventus it happened, we conceded the goal in minute 60 or something like that and we had a good start".
Asked if he felt United were operating on a fair playing field ahead of the derby, Mourinho said: "It's hard for me to answer because I focus on my job, I focus on the four lines".
"If we draw it's nine [points] and if we lose it's 12 - it's not the way to look at the match", Mourinho said.
Can United put in that kind of performance again, or will City blow them away like they have nearly every team this season?
"If you want to speak about their football potential we can speak and the football potential starts with investment". "We are both good guys, more than you expect, it's much better, believe me".
"I think there should be reaction and passion at the end of a match". It's not possible in November, they've already showed they can recover.
"The beauty of these two clubs and their fans who love their team - two teams in a great city", he says.
United produced an arguably even more impressive comeback victory on their last visit to City in April, recovering from two goals down to win 3-2 on a day when Pep Guardiola's side would have secured the title with a win.
It's not one player for United but rather one position and that's the two centre-backs - if whoever plays at centre-back play well enough they could get a result, if they play as they have been in a lot of the games they could get run ragged. "We will make a final decision after the weekend", Martinez said.
"We have a great team, we're top of the group and I'm sure we'll go through as group winners".
"Lukaku is training with the team [on Friday], if this answer is positive and we have of course one more session [on Saturday]", Mourinho said.
Romelu Lukaku could be available again following a hamstring injury. "But, for me, the Premier League, local leagues, are so important, with all the history".