United, who finished sixth last term, kick off their campaign with a home fixture against Slaven Bilic’s West Ham today.

Mourinho has followed up last summer’s £200m spree by splashing another £150m in this transfer window.

Romelu Lukaku, Nemanja Matic and Victor Lindelof have all arrived and expectations are high for a title challenge.

United face strong competition from the likes of Manchester City and Tottenham but Neville said: “You can’t just drop your expectation because they haven’t won it for a couple of years.

“They have to win the league. Mourinho has to win the league here.

“The money that’s been spent, his own personal expectations and what he’s always delivered has been titles, so I would say United have to approach this season to win the league.

“I don’t think it’s good enough to say, ‘they’re going to get back into fourth’.

“That isn’t an ambition when you’ve spent the money that’s been spent and amassed the players that Mourinho has now amassed.”