The 21-year-old only managed 8 appearances last season under Louis van Gaal, most of which came from the bench.
McNair, who was included in Mourinho’s 25-man pre-season squad earlier today, now has the chance to cement himself in the first team.
Speaking to the Belfast Telegraph, the Northern Irish defender stated that he was relishing the opportunity to impress his new boss.
“It is a new challenge for me and one that I’m really looking forward to,” McNair said.
“I’m confident that I can show the manager what I’m all about. I believe in my ability and hopefully he likes what he sees and gives me a chance.
“I’ll be working hard in training during pre-season and if I get a chance to play in any games that will be a good opportunity for me to show what I’m made of.”
McNair burst into the Man United side in suppressing and emphatic fashion. Against a powerful West Ham side, he put on a defensive masterclass, combining skill with grit. His stock continued to rise after another sensational performance against Everton the week after. In fact, perhaps his finest performance in a red shirt came against Mourinho; the youngster put in a marvellous performance at the back in a 0-1 loss to a Chelsea side destined for the title.
However, the 21-year-old struggled to replicate these endeavours in the following season. Under the tutelage of Mourinho, a man known for nurturing rough diamond defenders into world beaters, McNair has an excellent chance to reinstate himself as a first-team regular.