United had a frustrating summer, unable to sign any centre-backs and with Jose Mourinho looking increasingly irritated.
But that did not hinder them too much at Old Trafford as they made a flying start on Friday night, winning a penalty in the second minute when Daniel Amartey handled Alexis Sanchez’s deflected shot.
France midfielder Pogba stepped up and after a slow run-up placed the ball in the top-right corner above Kasper Schmeichel. The World Cup winner had not even expected to start, having only returned to training on Monday.
Left-back Luke Shaw then scored the first senior goal of his career after controlling Juan Mata’s aerial pass to double their lead.
Substitute Jamie Vardy scored a late consolation after Ricardo Perreira’s cross had hit a post, and Foxes goalkeeper Schmeichel came forward for an injury time corner but his header went wide.