Aaron Hill, a teenager, advanced to the second round of the European Masters with a 5-4 victory over world champion Ronnie O’Sullivan.
For the first time since winning the Crucible last month, the 18-year-old was allowed to take a 3-1 lead against Rocket.
As O’Sullivan’s move forward with a draw, Hill forced a referee to send him to the third round with a break of 78, where he will face Matthew Stevens.
Although the Irishman Hill became a professional earlier this year, he showed the nerves of steel to indicate that the future of cork pottery would be bright.
Hours before the gates in Milton Keynes, Peter Devlin created another uproar against Mark Williams.
The 24-year-old had to hold on to his nerve to beat the three-time world champion in a disorder at the Marshall Arena.
Devlin led 4-1, but Williams responded with a 5-4 victory over Rookie for 102 runs.
Londoner told World Snooker Tour, “It’s time to score a century in the decision-making frame against such a man.
“It simply came to our notice then. At 4-1, I know I can recover. For players like that you can get frames without making more mistakes, so I was expecting a comeback.
“At 4-4, the adrenaline was going down a bit, but I calmed it down again.”
In the second round, not only former world champions Williams and O’Sullivan but also Ken Doherty defeated Mark Allen.
Northern Irishman Alan scored four consecutive centuries to level history with a 5-0 victory but fell to a record low of 100 in the fifth frame.
World Championship runner-up Kieran Wilson also advanced after the whitewash. Ding Junhui had to dig in to beat Hossain Waffle 5-3.
Neil Robertson, winner of the European Masters tournament in Austria in early 2020, advanced safely to the third round after a 5-2 victory over Riley Parsons, but teen Hill was the talk of the town.