Roy Keane has revealed how Billy Gilmour’s “world class” performance against Liverpool forced him out of his seat.

The 18-year-old Chelsea midfielder shone against the European champions midweek with the Blues winning 2-0 at Stamford Bridge to advance to the quarter-finals of the FA Cup.

And Keane, watching the match at home, was stunned by his quality at such a young age.

The Irishman said on Sky Sports: “He was fantastic, I was sitting at home having a cup of tea and some chocolate and I didn’t have the volume on, as the game started I literally got out of my seat and said, ‘who is this kid in midfield?’

“There are certain traits you want from a midfielder, obviously quality on the ball, football intelligence, composure, he had everything.

Billy Gilmour delivered a man-of-the-match display as Chelsea defeated Liverpool in the FA Cup (PA)

“It was one of the best performances I’ve seen in a long, long time. The downside for the kid is he has got to back it up, he’s started so well.

“His general play [got me out of my seat], the way he started, he was like a world class player, that’s what he looked like, straight away. I thought it was one of their experienced lads.

“I kept a close eye on him for the rest of the game, everything he done throughout the game had quality written all over it.