ANTHONY McGill admits he is still coming to terms with the biggest win of his career after causing one of the biggest shocks in World Snooker Championship history to beat defending champion Mark Selby on Friday.

The Glaswegian potter was ruthlessly efficient in building a 10-6 lead in the morning session before staying remarkably composed to clinch a 13-9triumph.

Breaks of 68 and 87 moved McGill within one frame of victory and although Selby tried to stage one of his trademark comebacks,  the 24-year-old held his nerve with an 82 to get over the line.

The Crucible debutant, a 150/1 outsider for the title before the tournament, was calmness personified and claims the fact his scalp was Selby made it all the more special.

“I’m just ecstatic - I'm bouncing to be honest with you,” said McGill. “I’m over the moon to beat the world champion.

“Even when I was ahead I said to myself, this guy is not world champion for no reason. He’s renowned for his comebacks, so I can’t let him back in it. I thought if he got a couple of frames then I'm in trouble.

“I was just really determined to play well and win. I wanted to make my chances count. Not many guys beat the world champion, let alone at the Crucible. It’s the biggest win of my career, without a doubt.”

McGill’s reward for beating the world No.1 is a quarter-final clash with either Joe Perry or Shaun Murphy starting on Wednesday.

The world No.32 will try to become the first man since Andy Hicks in 1995 to reach the semi-finals on their World Championship debut and although he is now being tipped as a potential champion, the youngster is refusing to get ahead of himself.

“I’ve got two arms, two legs and a cue, so you never know what will happen next,” added McGill. “I will try my best but I know I will be a massive underdog whoever I play.

“I’m going to have to play exceptionally well to win, but I might as well enjoy it when it is happening.

"I'm not winning enough frames in one visit. There's a few areas I need to brush up on before I start thinking about those things. I don't think people will be fearing me.

"I'm probably a good draw in the quarter-finals of the World Championship to be honest. I'll just go out and try my best. Some players might let the attention get to their head but not me."

Gracious loser Selby said: "He played fantastically all match and thoroughly deserved to win. I played really poorly in the second session. Every time he got a chance he seemed to punish me.

"I said to him at the end that if he played like that there's no reason he can't win it. I've known Anthony for a few years now. I've no embarrassment in losing. You look at the greats who've won it for the first time and not defended it."

Meanwhile, John Higgins faces a tense final session in his last-16 contest with Ding Junhui after the Chinese sensation made a stirring comeback in Sheffield.

The Wishaw cueman led 5-1 early in the match, and 5-3 overnight, but Ding fought back to lead 9-7 as the pair prepare to play to a finish at 10am on Saturday.

Elsewhere, 2006 world champion Graeme Dott is trailing England’s Stuart Bingham 11-5.

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