Manchester United's defence isn't sufficient to win the Premier League title and Jose Mourinho is enduring a direct result of an absence of interest in the squad amid the mid year, as indicated by previous Old Trafford commander Gary Neville.

Joined drooped to a 3-2 crush at Brighton on Sunday with focus backs Eric Bailly and Victor Lindel of drawing specific feedback for their performances.

Manchester United's defence endured a torrid day at Brighton. John Peters/Man Utd via Getty Images.

Mourinho needed another central defender amid the exchange window and Neville trusts his previous club are paying the cost for not fortifying at the back.

"Disregard everything else, that back four isn't adequate to win a Premier League title," he revealed to Sky Sports.

"How about we begin and complete with that. That back four appears as though it will dependably motivation issues and dependably surrender goals. It doesn't have expert and that is an issue.

"[Mourinho] is in his third season and I figure he will feel to a great degree disillusioned that he wasn't upheld in the exchange showcase.

"You can't go out seventy five percent constructed. You need to complete it and finish the construct. ""He needs advance speculation. Clearly he does and the club should bolster him in that since you can't pull back part route through a procedure. They need to put it all on the line."

Mourinho said on various events amid the mid year that his group could discover this season "troublesome" - a notice that appears as though it will be demonstrated right judging by the miserable show at the AMEX.

It came hours after Manchester City, champions last season by a record 19 focuses, had pummeled Huddersfield 6-1 and Neville is concerned United are as of now investigating their shoulders only two recreations into the new battle.

"It will show signs of improvement and Manchester United will get more grounded and won't be anything but difficult to play against," included the previous England defender.

"I do figure they will complete in the best four, yet the main four verifiably has never been the benchmark of what Manchester United are.

"They have dependably judged themselves by Premier League titles. As of now in time, that looks improbable.

"Clearly it is still right off the bat in the season, however it looks far-fetched that Manchester United are anyplace close adequate, as we stay here today."