Time is ripe to switch Manchester United's formation - Amorim insists.

Manager Ruben Amorim argues that switching Man Utd's tactical system due to external scrutiny would have meant "the finish" for him.

In a first against Newcastle, Amorim abandoned his customary three-at-the-back setup with wide defenders and instead deploy an standard back four with two central midfielders.

By his own admission this at times transformed into a back six in the closing minutes as his side dug in for a crucial result - securing just their second shutout of the season.

While he once notably remarked that not even the Pope could force him to change his system, Amorim maintains the option to utilize different formations has remained part of his long-term vision.

Yet, he clarifies he could solely alter the tactics when his team were doing well enough - lest it would appear as if he was bowing to external noise.

"At the time I came here the previous campaign, I realized maybe I didn't possess the squad to excel in that formation, but it was the beginning of a process," he said.

"We were trying to establish an philosophy. Today is a separate juncture. We are missing a full complement of personnel, and we have to be flexible, so they comprehend why we are changing.

"It is not because of the demands of you guys, or the fans.

"Whenever the press talk about altering the formation constantly, I can't change because the squad will think I'm changing because of external voices and I think that is the end for the manager.

"Once we are performing strongly in our system, then is the moment to adapt.

"We are going to grow into a stronger side because when all the personnel are available, we are not going to employ three defenders all the time."

Injury Challenges Persist

Having just two victories in their last eight outings prior to defeating Newcastle, it is arguable whether Amorim is accurate to say his side have been playing well.

He is, however, managing with a depleted squad, with multiple first-team stars already ruled out for the upcoming fixture against winless Wolverhampton Wanderers.

That number will grow if playmaker Mason Mount is unable to shake off the injury that led to his exit from the Newcastle game at the interval.

Skipper Bruno Fernandes is one of those who will be absent for the Wolves match, despite the fact he is reportedly pushing his boss to let him to make a comeback following his muscle injury.

"Bruno is already saying he has to practice," revealed Amorim. "However there is no chance he is going to play against Wolves. No way. That's definitive."

The Captain's Leadership Endures

Nevertheless, the Portuguese star will almost certainly continue to be a prominent presence, as while most injured players watch matches from a private box, Fernandes was observed monitoring the pre-match routines from the mouth of the player's tunnel before the Newcastle game.

Amorim anticipates his captain to continue offering guidance.

"The guy is a leader," he declared. "He must not be that guy that when he is not playing, he's not talking and speaking. He's always speaking. That is the reason he's the captain.

"There are flaws sometimes - his mannerisms he moves his arms - but he has a lot of positive qualities. Even after he recovers, he heads to watch the rest of the squad practicing. There are a lot of things you don't see.

"I don't know if he wants my job or not, but he's a born leader. He is a true captain."

Recovery Timeline for Injured Personnel

Although the exact timeline for the captain's comeback - and that of fellow unavailable players like Kobbie Mainoo, Matthijs de Ligt, and Harry Maguire - is unknown, by the end of January, United will see the return of Noussair Mazraoui, Amad Diallo, and Bryan Mbeumo from international competition.