Mark Selby has said that he needs to relax in order to recapture the form that took him to the top of the world rankings.

The Jester from Leicester, who was displaced by Judd Trump as world number one earlier this year, stormed back from 4-0 down to beat Neil Robertson in yesterday's UK Championship quarter-final.

Despite his impressive display, Selby insists that there is much room for improvement.

He said: "I feel as though when I'm playing on top of my game I can win any tournament and beat anyone, but a lot of the time I go out there and don't seem to play my own game.

"I think it's definitely mental. I can't cue like I do on the practice table. I just seem to freeze. I wish I could just start matches after the interval.

"If I could do that, I'd be all right. I need to relax a bit more. The trouble with me is I want to win so bad I probably try too hard."

Selby will face Mark Davis in a best-of-17 semi-final at the Barbican Centre in York tomorrow.