The desire and effort was visible in all of his Mourinho's players, which is more than can be said for Saturday's 2-2 draw against relegation-candidates Southampton.
"Between us [there are] no problems - between the manager and the players", the Italian said. Every day we are working with the movies and with tactical moments on the pitch before the matches, we are repeating that.
"Jose Mourinho brings all his experience and knowledge of the game to us all, not just me", said the 19-year-old.
Arsenal forward, Alex Iwobi, has blamed momentary loss of concentration for ther 2-2 draw with Manchester United at Old Trafford on Wednesday.
"I think that it was not the result that we wanted before the game", he said. "But today was a tough game".
"We were unlucky because we started to play good in the first half, but we had two injured (players, Rob Holding and Aaron Ramsey) and we had to change so it was not easy for us".
"Now we have to think game by game and try to win a lot of matches because this period is very important", Darmian added. There is no game in which you can relax.
Diogo Dalot, who played on the opposite flank to Darmian, struggled against Arsenal's explosive left side, but also back his boss. Arsenal could have still scored a victor later on, with Pierre Emerick Aubameyang and Henrikh Mkhitaryan both close to scoring, but Iwobi admits they were not focused enough to snatch all three points. You know that when results are not what we want the feelings are not very good.