Romelu Lukaku made his first appearance for Manchester United against LA Galaxy on Saturday evening.Jose Mourinho sent the club’s £75 million summer signing on for the second half, with United already 3-0 up and cruising.Big summer signings at other Premier League clubs have recently scored on their unofficial ‘debuts’ - including the likes of Alexandre Lacazette, Wayne Rooney and Mohamed Salah - but Lukaku was unable to add his name to that list.He did, however, have plenty of opportunities to open his account.And one of his shots - a speculative effort from outside the box which found Row Z of the Stubhub Centre - went viral on social media.There are some Chelsea fans who are desperate for Lukaku to fail.Scorned after he rejected their club in favour of a move to Old Trafford, a number of Chelsea supporters on Twitter clearly hope that he shows his ‘true colours’ with the Red Devils and flops.

Chelsea fan's video of Lukaku's 'highlights' v LA Galaxy

One Chelsea fan on Twitter - @ConteMindset - has even created a two-minute video showing Lukaku’s individual ‘highlights’ against LA Galaxy.

To be fair, it’s pretty funny.

Watch it here…

Here are a few of the replies to the video…

Mourinho confident Lukaku will shine for United

Lukaku’s first appearance for United undoubtedly could have gone better, but Jose Mourinho has no doubt that the Belgian striker would turn out to be an excellent signing.

“He was difficult to get,” the Portuguese coach was quoted as saying by United’s official website. “He is from the Premier League. Obviously there are other good strikers in football, but the Premier League is a very specific habitat. A difficult habitat for strikers and normally they need some time to adapt, but Lukaku has been in the Premier League for five seasons.”

Carrick: Lukaku faces unique pressure at United

United captain Michael Carrick, meanwhile, believes Lukaku will face a unique pressure as a Man Utd player.

"The jump is massive," Carrick told The Guardian, per Sky Sports. "I found that myself coming from Tottenham. It's a massive jump. You can't really explain to people until they've gone through it.

"I'm sure he'll find the same. But having Premier League experience is a massive bonus. He'll know how things work week to week. It's just about dealing with the pressure.

"It's early days. It's one week's training and 45 minutes against Galaxy so you can't come to any conclusions.

"We know what he is all about, there are no surprises. We all know exactly what he brings and that is why he is here. He is not going to change his game because he has come here.

"He does what he does best and obviously he's been brought here to score goals. I am pretty certain he will do that this season."