World number 80 Lee Walker pulled off a shock 4-2 scalp of Judd Trump to book his place in the Last 16 of the English Open on Thursday afternoon.
Walker, 43, rolled back the years to complete one of the biggest wins over his career as he defied a brace of century breaks from the world number one at the K2 Centre in Crawley.
Walker opened up with breaks of 74 and 67 to establish a 2-0 lead before Trump hit back superbly with a 135 clearance and a break of 101 to restore parity.
Walker regained the lead thanks to a break of 59 before adding a 65 in frame six, and despite Trump almost recovering from the snookers required stage, the Welshman held firm to get over the line.
“I think probably the standard of the match is the best I’ve been involved in,” Walker told Eurosport.
“I’ve had good wins over Mark Selby, Neil Robertson but I think that certainly would be up there probably with the best standard overall.
“It’s tough out there and when you’re playing the top players you need the little rubs to go for you out there.
“It was nice just to drop over the line in the end.
“My form in practice has been good but it’s difficult to take that into matches sometimes.”
Elsewhere, Ronnie O’Sullivan continued his progress by brushing aside Iran’s Hossein Vafaei 4-1, recovering from a frame down with four in a row to sail through.
O’Sullivan will face China’s Mei Xi Wen in the Last 16 on Thursday evening after he defeated Elliot Slessor by the same scoreline.
Chinese prospect Zhao Xintong enjoyed one of the most emphatic wins of his career to date as he whitewashed world number four Neil Robertson with top breaks of 68 and 71.
Tom Ford, the only player to make a competitive 147 so far this season, overcame German Masters champion Kyren Wilson 4-2 with top breaks of 69, 124 and 74, while Ricky Walden came through a deciding frame on the final black to deny Michael Holt.
Xiao Guodong also held his nerve in a last-frame shoot-out to edge out Jack Lisowksi, while Si Jiahui whitewashed compatriot Zhou Yuelong to extend his best run in a ranking tournament to date.
Shoot-Out champion Thepchaiya Un-Nooh dispatched former World Champion Graeme Dott 4-2 with top breaks of 88 and 77, as Mark Selby took the final two frames with breaks of 69 and 77 to see off Matthew Selt 4-2.
English Open 2019 Results
Thursday October 17
Si Jiahui 4-0 Zhou Yuelong
Tian Pengfei 4-2 Dominic Dale
Tom Ford 4-2 Kyren Wilson
David Gilbert 4-2 Kurt Maflin
Ricky Walden 4-3 Michael Holt
Xiao Guodong 4-3 Jack Lisowski
Matthew Selt 2-4 Mark Selby
Fan Zhengyi 0-4 Shaun Murphy
Graeme Dott 2-4 Thepchaiya Un-Nooh
Ronnie O’Sullivan 4-1 Hossein Vafaei
Mei Xi Wen 4-1 Elliot Slessor
Mark Allen 4-1 Louis Heathcote
Barry Hawkins 4-2 Fergal O’Brien
Gary Wilson 4-3 Joe Perry
Neil Robertson 0-4 Zhao Xintong
Lee Walker 4-2 Judd Trump