Manchester City captain Vincent Kompany says Manchester United striker Romelu Lukaku is convinced he's the best player in the world!

On Thursday, he witnessed first hand the new dimension he has added to Jose Mourinho's attack - when the £75m striker burst through Manchester City's defence to fire a stunning opening goal in United's 2-0 win in Houston.

“I want him to do well - except for in a few games this season," the City captain told ESPN. “As long as we're ahead of them, I'm happy for him to do really well.

“The one thing you get when you have Romelu is an incredible drive to improve and to score goals.

“It's something really unique that I've been able to observe over the years because he's been a player from Anderlecht, which is the same youth system where I come from and I've really followed his progress.

“The key thing with him is he believes he's the best player in the world."