Both Stephen Maguire and Stuart Bingham suffered shock first-round exits at the Shanghai Masters as Xiao Guodong and Kyren Wilson produced stunning displays.
Xiao gave the home fans something to cheer with a 5-2 win over Maguire - but Wilson's was arguably the performance of the day as the 21-year-old marked his first appearance at the final stages of a ranking event by beating Bingham 5-1.
He could even have added a 147 break in frame four, but missed the 13th black after making 97.
That was more than enough for a four-frame lead and though Bingham pulled one back in the next, a run of 54 in frame six sealed Wilson's win.
The world number 100, who next faces Marco Fu, told worldsnooker.com: "It's my first ranking event so I'm pleased with my performance. It's a massive win and I'll always remember it.
"Hopefully I can go on and do better. Marco recently won the Australian Open so I know he's playing well. But Stuart is a very good player and I have beaten him 5-1 even though I was the underdog."
Xiao made breaks of 89, 54 and 69 in beating world number five Maguire but said: "It's more about my opponent's bad performance, because I wasn't playing that well.
"He didn't put me under pressure during the first four frames so I was really relaxed.
"I had a chance to close the match out in the fifth frame but he managed to fight back, which affected me somehow. After that every frame went scrappy but I found the key to win the match and I'm happy to be in last 16."
Martin Gould came from 3-2 down to beat Ricky Walden 5-3, while Mark King book-ended his 5-3 win over Graeme Dott with breaks of 106 and 70.
King said: "It's nice to still be in the tournament. Graeme was below his normal standard. I struggled in patches but made a couple of good breaks."