Ronnie O'Sullivan has been knocked out of the World Snooker Championship by amateur player James Cahill.
The 23-year-old, who was made his debut at the tournament, beat O'Sullivan 10-8 to book a place in the second round.
It is the first time that O'Sullivan - a five-time world champion - has lost in the first round at Crucible since 2003.
'The biggest upset in the history of the World Championship!'
Amateur debutant @JamesCahill147 has knocked out the GOAT @ronnieo147 in the first round at the Crucible! pic.twitter.com/Xp9mhHPdfB— Eurosport (@eurosport) April 23, 2019
Cahill led 5-4 overnight and 8-5 at the mid-session interval. O'Sullivan then roared back to win the next three frames and level the match at 8-8.
In the 17th, O'Sullivan looked as though he was about to take the lead. However, he missed an easy and crucial pink to allowed Cahill to make the steal.
In the deciding frame, O'Sullivan also looked to be in control but then potted a red along with the blue. That chance allowed Cahill to take the frame and the match.
Cahill, who hails from Blackpool, won three qualifiers to become the first amateur player to appear at the World Championship.
'That is what pressure does, folks' 😰@JamesCahill147 is now just one frame away from a MASSIVE shock at the Crucible that would send @ronnieo147 home after the first round#ilovesnooker pic.twitter.com/r6TvWrjkh9
— Eurosport (@eurosport) April 23, 2019
