Time is ripe to change Manchester United's tactical setup - Amorim declares.

Boss Ruben Amorim contends that switching Man Utd's tactical system due to external pressure would have been "his demise" for him.

For the first time against Newcastle United, Amorim moved away from his usual back three formation with wide defenders and chose to field an orthodox four-man defense with two central midfielders.

By his own admission this at times functioned as a back six in the final minutes as his squad dug in for a win - securing only their second-ever clean sheet of the season.

Although he once memorably stated that not even the highest authority could force him to adjust his approach, Amorim asserts the option to utilize different formations has remained part of his strategy.

However, he emphasizes he could only implement the change when his team were performing at an acceptable level - or else it would appear as if he was bowing to outside pressure.

"When I arrived here last season, I realized perhaps I didn't possess the players to play well in that system, but it was the beginning of a process," he commented.

"We were trying to forge an philosophy. Now is a distinct juncture. We lack a lot of personnel, and we have to adjust, so they comprehend why we are switching things up.

"This isn't because of the demands of journalists, or the fans.

"When media discuss changing the system constantly, I cannot change because the players will believe I'm changing because of external voices and I believe that is the downfall for the manager.

"Once we are playing well in our system, that is the opportunity to change.

"This will help us develop into a more complete squad because when all the personnel are back, we are not going to play with three defenders exclusively."

Availability Crisis Persist

Having only two victories in eight games prior to defeating Newcastle, it is arguable whether Amorim is accurate to state his side have been in good form.

He is, however, operating with a injury-ravaged squad, with multiple senior players already confirmed absent for the upcoming home game against struggling Wolverhampton Wanderers.

That figure will grow if playmaker Mason Mount is unable to recover the knock that forced his withdrawal from the Newcastle game at the interval.

Captain Bruno Fernandes is a key name who will miss the Wolves match, despite the fact he is reportedly urging his manager to let him to return following his hamstring injury.

"Bruno is already telling me he needs to practice," said Amorim. "However there is no chance he is going to play against Wolves. Definitely not. You can write that."

Fernandes' Influence Is Unwavering

Nevertheless, the 31-year-old will probably continue to be heavily involved, as while most injured stars view matches from a private box, Fernandes was seen monitoring the pre-match routines from the mouth of the player's tunnel before the Newcastle game.

Amorim anticipates his captain to continue providing guidance.

"The guy is a natural leader," he stated. "He must not be the type of player that when he is absent, he's silent and offering advice. He's constantly communicating. That's why he's the captain.

"He has negative aspects at times - the way he gesticulates - but he has a multitude of good things. After he recovers, he goes to observe the rest of the squad practicing. There are a lot of aspects that go unnoticed.

"I don't know if he desires my position or not, but he's a born leader. The guy is a true captain."

Return Timeline for Injured Players

While the exact date for Fernandes' comeback - and that of other unavailable players like Kobbie Mainoo, Matthijs de Ligt, and Harry Maguire - remains unclear, by the end of January, United will see the return of Noussair Mazraoui, Amad Diallo, and Bryan Mbeumo from international competition.