United beat Everton Four-Zero the day gone by after any other overdue flurry of targets.
They moved stage with Manchester City at the highest of the Premier League.
But Neville thinks they nonetheless have a subject – at the left facet in their defence.
Jose Mourinho performed Ashley Young there this week with Matteo Darmian at the bench, and Daley Blind and Luke Shaw overlooked of the 18.
Marcos Rojo stays injured however Shaw has performed for the under-23s and will have to be as regards to being on top of things.
And Neville thinks they’ve were given issues, whilst they give the impression of being protected at the correct with Antonio Valencia.
“He’s been absolutely outstanding for the last 18 months, two years,” Neville mentioned of Valencia on Sky Sports.
“I had doubts as as to if it will ultimate in the longer term with him, I assumed it was once extra of a stop-gap till they signed a right-back. But he is the true factor.
“He is a best right-back now. He’s robust, fast, helps the assault, and does not make any errors. United do not want to signal a right-back. To assume they signed Matteo Darmian because the right-back, Valencia is head and shoulders above him.
“I believe the problem is at the different facet at left-back, the place Ashley Young was once put below a lot of power through [Tom] Davies and [Cuco] Martina. Blind’s performed there, Rojo’s performed there, Shaw’s performed there, Darmian’s performed there, they are able to’t button that one down.
“But Valencia at right-back has been completely incredible.”