Lingard's exertions came at a cost, though, as a groin injury that he had carried since Russian Federation lied him low for a month, with the attacking midfielder only scoring his first United goal of the season when securing Wednesday's 2-2 draw at home to Arsenal.
United are now 18 points behind first-place Manchester City and, perhaps more significantly, eight points off the UEFA Champions League qualification places.
"Obviously it got to a point where I couldn't carry on, so that break did me well and I am raring to go now. For example the last two matches against teams like us, their mind is to be in the top four, I think the team - not for 90 minutes because it's impossible to do it for 90 minutes - but more or less we control a lot of minutes in these matches".
"The first pretty much 20 seconds, it got the crowd up on their feet and it kind of gave us a buzz after that".
Darmian's words were echoed by fellow United defender Diogo Dalot, who labelled Mourinho "one of the best coaches ever". We had to put on a performance for the fans and show the passion on the pitch for them. It was an enjoyable summer and a good season for me on a personal level last season.
Aaron Ramsey also came off with an ankle injury at Old Trafford, but Emery said "it's smaller than Rob's" and that the Wales global will also be assessed on Friday. "So, for me, it was good to learn the language well and quickly".
Wenger, in his final season, used the competition to keep fresh fringe men he had decided not to employ in the Premier League even though three of them - England duo Theo Walcott and Jack Wilshere plus Olivier Giroud of France - were internationals of experience and reputation.
Arsenal lost Rob Holding to a serious-looking knee injury (Martin Rickett/PA).
The Man United players were directly at fault for Arsenal's goals but that really did not matter to Unai Emery.
At one point during the second half both teams completely gave up on tracking back and the game started to look like a playground match where everyone was chasing the ball.
"Every time mistakes happen, but it is good we stayed together and fought together. We have confidence and we have to win the next matches".