Lukaku forced a penalty not long after coming on and Martial scored for the fifth consecutive matchday.
And Ilkay said victory in the 177th Manchester derby not only sent City into the worldwide break two points clear at the top - it also helped atone for last April's 3-2 loss to United at the Etihad. United ended this game in eighth position, 12 points behind their cross-city rivals and with a negative goal difference after 12 games.
The lack of a truly world-class creative player in the United squad stands out when they are up against a quality opponent like City, but Mata is the best that they have and he should be used more often.
David Silva's 12th-minute opener, after Raheem Sterling had exposed Ashley Young on the City left, gave the home side an early advantage that they rarely looked like surrendering against a United team weakened by the absence of injured midfielder Paul Pogba. "They're the games that I love to be involved in". They had 6-0 wins, no pressure, relaxed.
After the game Mourinho was asked if the derby summed up why City are pushing for a second-straight title and United, who finished a distant second behind them last season, are now exclusively focused on trying to finish in the top four. "I believe in this team".
But you've got to admit, that still is pretty amusing from the England global.
"We can not lose the ball the way we did".
Asked why his team had been fearful, Guardiola replied: "We wanted to play good in front of our fans and we know how important it is to play in this game".
"I think these big games are what you play for", Lingard told MUTV.
"I haven't got a clue!" When the result was 2-1 and it was the moment we had that final push, it was the moment Fellaini was doing an incredible effort to stay on the pitch.
"Of course you learn in every game and you're delighted with the result but there are games where you win 1-0 or you draw 1-1, when things are that little bit tighter, and what you learn from those matches you then take into the next one".
"Lets fight to close the gap to jump into the top four".