Gary Neville has confessed his growing anxiety about Manchester United's trajectory as he questioned whether the club will continue supporting Ruben Amorim.
The Red Devils endured their third loss in six Premier League matches this campaign after succumbing 3-1 to Brentford on Saturday, with former Liverpool goalkeeper Caoimhin Kelleher saving a penalty. Amorim has failed to secure consecutive league victories throughout his 10-month tenure, with his team's defensive lapses against the Bees intensifying scrutiny on his position.
Neville has expressed fresh reservations about the 40-year-old's Old Trafford future, suggesting he risks appearing foolish through certain tactical choices. "I am very worried, Rebecca; there is no point in me sitting here and saying I'm not," he told NBC Sports' Rebecca Lowe.
"The levels of performance, the results, and the substitutions yesterday.
"I saw something at the end of the Grimsby game that they lost in the Carabao Cup a couple of weeks ago, which was Mason Mount ending up at left wing-back.
"We admire managers who are stubborn and resilient around their system; we want them to stick to their plan, but when you have Mason Mount playing at left-back, you are going to look pretty stupid.
"It has happened twice now, and it can't happen. The first time I thought it was unforgivable, and yesterday it happened again. He changes his back three and his back five every single game, and the performances and the results are just unacceptable.
"I'm really, really worried. I would never go on television, as I know how difficult a manager's job can be, and say a manager should be sacked, but I suspect the hierarchy at Manchester United are going to want to see a turnaround."
Despite a poor start to the season, the ex-Sporting Lisbon coach maintained after Saturday's match in London that he still believes in his ability to bring success to Old Trafford.
He said: "I am always comfortable with the job. I am not concerned, it is not my decision. I will do the best I can every minute I am here. I am never concerned about my job, I am not that kind of guy.
"I'm always doing my job. If I win, I'm in a different state of mind. That is normal, but I'm always confident because I know what to do. I've always taken a lot of responsibility on your own shoulders.
"We can play better and we need to play better. It's like ups and downs. When you win, you feel that everything, the momentum, is here.
"When you lose, you go back to the same place and you fight again for one win that can help you to create the momentum.
"I cannot tell you more than I say every time I lose the game. Sometimes you see one team that performs really well and you see improvements. And then sometimes you have some games that you don't see that improvement.
"That gives you the confidence to say that Manchester United is going to get back. So it's always the same conversation. It depends on the next game. So let's try to win the next game and to improve certain things."