Graeme Dott suffered his heaviest defeat at the Betfred.com World Championship this morning as Joe Perry completed a 10-1 demolition of the Scot.

The 34-year-old Larkhall cueman, world champion in 2006, had been 8-1 down overnight and offered little resistance when play resumed at the Crucible. Perry goes on to play Stephen Maguire in the last 16.

Dott was frank about his performance, saying: "I played terrible. I don't think I've played worse, not only at the Crucible but as a professional. I just couldn't pot a ball.

"I couldn't have cared less if it was a whitewash. Ten-nil or 10-1, it's still a drubbing. I lost 10-7 to Joe Perry here once and he played fantastic, I couldn't give him any more high praise.

"But he's beaten me 10-1 there and he's played rubbish. Joe's not played well at all there."

Meanwhile, Mark Allen has apologised for his comments about the integrity of Cao Yupeng and other Chinese players.