Manchester United vs Brighton and Hove Albion - 5 key talking points

#1 Romelu Lukaku needs to shape up, or a lion is taking his place in the XI

Jose Mourinho has a word with Romelu Lukaku as the big man struggled to locate his shooting boots

No one can fault Lukaku's work ethic. The big man, often lambasted for not running enough during his Everton days, was everywhere along the front lines against Albion, charging down loose balls, chasing lost causes, closing defenders down and it was, in fact, one of those full-hearted attempts that won the corner which led to the only goal of the match.

United, though, didn't shell out £75 million for his closing down abilities. He missed two presentable heading chances, and a wonderful shooting chance in the opening stages of the game and his profligacy in front of goal is growing into a real worry for a team that suffered so much due to this last season.

On the sidelines, Zlatan Ibrahimovic is almost back to his 100% best, and while he too was guilty of profligacy last season, he will sooner rather than later take Lukaku's spot in the starting XI if the Belgian keeps missing like he has in the past few games.