MARK SELBY produced a remarkable recovery to beat Neil Robertson in their williamhill.comUK Championship quarter-final.

The world number two trailed 4-0 at the mid-session interval of the match with the Australian but reeled off six consecutive frames to win 6-4 and book a semi-final match up with Mark Davis on Saturday.

He sealed the victory with a classy century but it was a win that looked totally improbable following the early skirmishes.

If Selby was out of sorts at times against Ryan Day in round two, he was desperate early on against Robertson and deserverdly well adrift.

But he gradually clawed his way back into the contest and, once he levelled the match at 4-4, he found another level.

A long tight ninth frame went in his favour and then in the next, after Robertson missed a difficult red to the left corner, Selby was ruthless in compiling a brilliant 101 to take him into the last four.

A pumped-up Selby thumped the table in triumph and said after the match: "It's obviously special to win and the way I finished off was pleasing but at the start of the match I was terrible, pathetic and deserved to be 4-0 down.

"At the end of the day, a win is a win. Everyone says it doesn't matter how you do it but it is still always nice to play well. I think until 4-3 I didn't really start playing as I am capable of playing.

"It's surprising to come out on top because to beat a class player like Neil more times than not you are going to have to go out there and score heavily. I didn't do that until 4-3.

"I am still trying to get over the win. I am still in shock. I am chuffed to bits that I am in the semi-finals of the second biggest tournament we play in."

Robertson, who said the result was "crazy" and believed his break-building let him down at the finish, was in total command but had no answer as the Leicester potter staged such a remarkable comeback.

"I don't feel I have thrown it away in terms of missing frame ball after frame ball," Robertson said. "It is just one of those matches where you are a little unlucky. It's a shame it wasn't my year this year. I feel as though I have completely dominated the match.

"That's the game of snooker for you, I suppose."

In the other last eight clash, Davis' fantastic run in the competition continued with a 6-4 win over Matthew Stevens.

He will now meet Selby on Saturday.