In the later half, United increased their frequency of attacks and Rashford, three minutes after coming on, found the back of the net when he converted Henrikh Mkhitaryan's corner. A maximum nine points from their first three games and an impressive goal differential will have everyone in the right mood around Old Trafford.
"If I have to choose a word to describe my team, I would have to say "solid".
After a slow start, United clicked into gear, Lukaku holding off the Leicester defence on the edge of the box and unleashing a low drive which required Kasper Schmeichel to make a smart save.
After Romelu Lukaku missed a second-half penalty, the two substitutes netted inside the final 20 minutes to send United to the top of the standings ahead of the global break.
"I think we played very well", manager Jose Mourinho said. He will not be ready to play in the next few months, but his experience and voice will be heard in this team.More news: Surprise WWE debuts on Smackdown
"Very good players", Mourinho said, when it was suggested that he had made intelligent substitutions.
"But I am happy if I am not going to have that and I don't think I am going to have that".
Schmeichel senior enjoyed a decorated career with Manchester United, but the 129-time Denmark global was unable to keep out any of the three Premier League spot-kicks he faced at Old Trafford. We are comfortable on the ball and risky on the counterattack. "But I think he understands me better too and the personal relation [between us] is good, so again Anthony, I hope he's going to better this season than last season".
Paul Pogba secured 140 points and was announced as the UEFA Europa League Player of the 2016/17 season asMkhitaryan (Armenia) and Zlatan Ibrahimović (Sweden) came second and third with 129 and 109 points respectively. "It was very, very good that we have won and we have [won] three out of three".
"The whole team stuck to the task well and, fortunately, we got the goal".
De Gea kept out Riyad Mahrez from a tight angle when Leicester had a rare venture forward at the other end, after which Foxes manager Craig Shakespeare introduced Demarai Gray and Andy King from the bench. Came to claim the ball well whenever needed, too: it is odd to think that this was once a weaker part of his game.