Chelsea midfielder Billy Gilmour has declared Manchester United rival Scott McTominay as his toughest opponent.

The pair are set to be long-term Scotland teammates, but Gilmour admits facing McTominay has been the biggest challenge of his career so far.

He told the club's YouTube channel: "It was against Manchester United, actually.

"It was Scott McTominay. I know he's fellow Scottish and all that but he was so good, quick, strong and technically good. So, I think it was tough playing against him.

"He played really good, He was stopping everything in midfield and controlling the game."