Rangers fan Graeme Dott won snooker's 'Auld Firm' clash to complete the Embassy Snooker World Championship quarter-final line-up on Monday night.

Underdog Dott defeated Celtic supporter John Higgins 13-10 but admitted: "I'm not really in the same league."

Dott has been second best in all but one of their previous meetings, so victory was particularly sweet for the Larkhall-based professional.

Higgins, world champion six years ago, briefly threatened to pull off a great escape as he won three successive frames from 12-7 down.

But Dott produced a superb 62 break in frame 23 to set up a meeting with another surprise first-time Sheffield quarter-finalist David Gray.

"I know I can beat any player in the world but I need a little bit of help," said the world number 13 after avenging last season's 13-2 defeat at the same stage of the tournament.

"I couldn't play to that standard John produced last year, probably even in practice.

"That's the worst I've seen John play. But to be honest, I needed him not to be on top form to beat him.

"It's the same with Arsenal and Manchester United. They will win every game when they play well - and if I was a football team I wouldn't be one of them.

"I'm tough to beat, though, and I'd probably be in Europe all the time. But I don't think I'd be in the Champions League losing in the first round all the time like Rangers."

World number four Higgins is the highest seed to fall but he gave it his best shot after slumping five frames behind.

He was on his way to a third maximum break of the season in frame 20 but broke down on the 12th black.

Higgins stole the 21st frame and then really put the frighteners on 26-year-old Dott with a superb 130 clearance.

He made a good start to the 23rd frame, but Dott's clearance of 62 from 24-0 down left his compatriot in a perilous position from which he could not escape.

Higgins admits in order to be a winner again he may seek the advice of a sports psychologist.

"My concentration is just not there," he said.

"It's not good enough if I want to compete and win things.

"The more you lose the more you doubt yourself. It was torture out there, and it's heartbreaking when you play like that.

"Graeme is never going to blow you off the table but he did a fantastic break in the last frame when the pressure was on."