Alexis Sanchez came off the Manchester United bench to score the winning goal in last week's 3-2 comeback win over Newcastle United.

But the Chilean forward has really struggled since leaving Arsenal in January.

Sanchez, 29, has only managed three goals in 18 Premier League appearances for the Red Devils.

Paul Pogba - who has also been criticised for his performances - recently defended his new Man United teammate.

"What you have to know about Alexis is that he is a hard worker," said Pogba. "He trains very well, he always tries to help the team, talks with the team and everything.

"When you play a long time with another team and you play different football in that other team, you have some kind of adaptation that you have to have.

"It's not that he is playing bad. We know that Alexis Sanchez can bring a lot and I'm sure he will."

But not everyone is so sure about Sanchez.

Man United legend Paul Scholes has now shared his brutally honest opinion on the former Arsenal star - and suggested he was only signed to stop him from going to Manchester City.

"I know he [Sanchez] has qualities and has been a good player but I never saw him as a United player," Scholes told ESPN in an exclusive interview.

"I saw him as a bit selfish, someone who played for himself sometimes. I didn't think he was a player that we needed, especially for that type of money.

"How would we be able to get rid of him now when he earns those wages? The signing felt like it happened just to stop Man City signing him.

"It feels like every player who comes into the team struggles.

"I feel like we could sign Lionel Messi at the moment and he'd struggle in this team."

It's the brutal truth - there's no one performing particularly well in a Man United shirt under Jose Mourinho.

And perhaps Sanchez was only brought in to get one over their rivals.

Pep Guardiola had tried to sign Sanchez for Man City in the previous transfer window but Arsene Wenger blocked the transfer.

Months later, he completed a move to Old Trafford as part of a swap-deal involving Henrikh Mkhitaryan.

Sanchez has almost four years remaining on his lucrative deal at Man United.

Will he finally come good at United or will he be the most expensive mistake in the club's history? Let us know your opinion by leaving a comment below.