World number one Mark Selby suffered a shock 4-2 defeat by Tom Ford in the first round of the World Grand Prix.
Selby's loss follows Tuesday's surprise exits of former world champions Ronnie O'Sullivan and Neil Robertson.
Selby struggled for rhythm, managing a top break of 60, while Ford compiled a 112 and booked a meeting with Ali Carter with a composed 84.
Defending champion Judd Trump beat Mark Williams for a second successive year in Llandudno.
Trump, who beat Williams in last year's quarter-finals, was a 4-1 winner in their first-round match.
He will face reigning world champion Stuart Bingham in the second round on Thursday after Bingham beat David Gilbert 4-1.
The 2005 world champion Shaun Murphy coasted through, whitewashing Wales' Michael White 4-0 and another Welshman Jamie Jones was beaten 4-2 by Englishman Kyren Wilson.
Carter beat Belgium's Luca Brecel 4-1, China's Liang Wenbo won 4-1 against Scot Graeme Dott and Thailand's Thepchaiya Un-Nooh beat Hong Kong's Marco Fu 4-3.
The winner of the tournament will earn £100,000 in prize money.