Defending champion Scott Waites was beaten in the first round of the BDO World Championship by Alan Norris.
Yorkshireman Waites failed to win a set as Yeovil's Norris blitzed him 3-0, securing the victory with a bullseye.
Three-time world champion Martin Adams beat Canada's David Cameron 3-1 in his preliminary-round encounter.
Adams, who tumbled down the world rankings in 2013, plays last year's beaten finalist Tony O'Shea in the first round proper.
Two-time semi-finalist Wesley Harms is into the second round after the Dutchman beat England's Paul Jennings 3-0.
And England's Martin Atkins beat eighth seed Jeffrey de Graaf of the Netherlands 3-0.
Following his humbling at the hands of the 41-year-old world number 31, carpenter Waites said he might consider taking up darts full-time.
"I've had a fair few mishaps coming up to Christmas but Alan played awesome on the day," said the 36-year-old.
"I know what sort of game I'm going to get from Alan and I didn't turn up."
Adams, 57, raced into a two-set lead without losing a leg only for Cameron to rally, the man from Nova Scotia securing the third set with his ninth shot at a double.
But Adams, making his 21st appearance at the Lakeside, held his game together to win the final set 3-1.
"There was a hell of a lot of pressure because a lot of people are here to see me win," said Adams.
"It was a massive game because when you've struggled, you never really know if it's going to happen for you again. I'm happy."
In the women's tournament, nine-time champion Trina Gulliver was beaten 2-0 in the first round by Tamara Schuur of the Netherlands.