Manchester United supporters are quickly finding out why those who follow Arsenal weren’t overly disappointed when the club allowed Alexis Sanchez to leave in January.

Sanchez has failed to live up to expectations at Old Trafford, scoring just once for the club and relinquishing possession more times than any of Jose Mourinho’s players.

It’s too early to write Sanchez off just yet, of course. Indeed, Mourinho will feel Luke Shaw and Paul Pogba are bigger issues right now.

But questions have to be asked when a player who is earning a reported £600,000-per-week is failing to perform.

Sanchez was on the bench in Man United’s 2-0 win over Brighton last Saturday and it remains to be seen whether he will regain his place in the starting line-up after the international break.

It would reflect poorly on Mourinho if his marquee signing became a regular on the bench but there are players in the squad eager to take the 29-year-old’s place.

There are many who believe we will have to wait until next season to see Sanchez at his best again. But according to the Daily Mail, there can be no guarantee of that happening.

Sanchez is miserable and eats alone

Chris Wheeler of the Mail has penned a detailed insight into Sanchez’s current situation and it doesn’t make for great reading.

The Red Devils apparently fear Sanchez could become a flop just like Angel Di Maria was.

Staff at the club’s Carrington training base are surprised by Sanchez’s miserable demeanour, and have noted that he looks unhappy and isolated.

Indeed, the former Arsenal man regularly eats alone in the canteen.

What a Man United source has said

Some have even been unable to shake the feeling that Sanchez regrets signing for Man United.

“He looks like someone who doesn't want to be here,” a Man United source said.

“The whole thing doesn't seem right and he looks like a lost boy. It was the same with Di Maria.”

Just what you want to hear about a player who is taking up a large chunk of the wage bill.

It’s unlikely Mourinho will pay any attention to the reports - he’s expecting Sanchez to shine next season.

"He came in the worst moment of the season, which is the winter market," the Portuguese coach said earlier this month.

"That's why I don't like the winter market very much.

"I think this [signing Alexis] was a chance that we didn't want to lose and we made it.

"But we don't believe a lot in the winter market and, for sure, next season it will be better for him.”