Anthony McGill described it as "the best moment of my life" after stunning the Crucible by knocking defending champion Mark Selby out of the World Championship.
Selby lost 13-9 to the 24-year-old quaifier in the second round.
McGill will next face the winner of the match between Joe Perry and Shaun Murphy.
"I have no embarrassment in losing and not going on to defend it," said Selby. "He played fantastic all match."
For Selby, his defeat continues the 'Crucible Curse' - no first-time champion has ever made a successful defence of the title.
McGill, who beat fellow Scot Stephen Maguire in the first round of the £1.4million showpiece, said: "That's the best moment of my life. Selby is a great player."
Ulsterman Mark Allen takes a 5-3 overnight lead into his last 16 clash with Barry Hawkins.
The match concludes tonight with the winner taking on former champion Neil Robertson or Ali Carter in the quarter-finals.
Five-time champion Ronnie O'Sullivan is back in action tonight when he takes on Welshman Matthew Stevens, conqueror of Belfast cueman Joe Swail in the final qualifying round.
The controversial O'Sullivan caused a stir by playing part of his first round win over Craig Steadman without shoes - thus breaking the dress code.