Marcus Rashford and Marouane Fellaini came off the bench to score as Manchester United's perfect start to the season continued with a 2-0 victory against Leicester.
Those goals saved the blushes of Romelu Lukaku, who had seen a penalty saved by Kasper Schmeichel in the 53rd minute.
But Rashford, who had been replaced in the starting XI by Anthony Martial, came on for Juan Mata in the 67th minute and scored three minutes later.
The England international kept his composure to fire home a Henrikh Mkhitaryan corner from close range after losing his marker.
Then Fellaini knocked one in with his knee in the 82nd minute following good work from Jesse Lingard on the left wing.
That victory keeps United top of the Premier League table and they are the only side in the division to win their opening three matches, a feat that can be matched by West Brom should they beat Stoke on Sunday.