Colin Osborne beat 13th seed Kevin "The Artist" Painter 3-1 in the PDC World Championship in Purfleet.
The unseeded Osborne, known as "The Wizard", lost the first leg after a brilliant 155 Painter checkout but stormed back to take the opening set.
A 10-dart leg helped Osborne win the second before a cut finger sustained when retrieving his darts allowed his fellow Englishman to claim the third.
But Osborne held his nerve to win the fourth and seal his place in round two.
"I just kept plugging away and carrying on and when my chance came I took it," said Osborne.
"The first set proved that. Kevin was 2-0 up but missed a couple of doubles and I was ready to take my chance."
Mark Dudbridge, runner-up to Phil Taylor in 2005, looked back to near his best in a 3-1 victory against John Kuczynski of the United States.
It was too easy - I need to be pushed. It's better to be up against someone who keeps hitting 100s and 180s because you have to play well
Fourth seed Roland Scholten had things all his own way against Canada's Ron Miller, who took the opening leg but lost the next nine to go down 3-0.
Osborne will meet Wes Newton in the second round after his fellow Englishman brushed aside the challenge of Japan's Tetsuya Wada 3-0.
Andy "Pieman" Smith, a lumberjack, beat China's Shi Yongsheng 3-0, but was far from happy.
"It was too easy - I need to be pushed. It's better to be up against someone who keeps hitting 100s and 180s because you have to play well," he said.
Smith's next opponent will be 12th seed Andy Jenkins who, two weeks after the loss of his father Chris, prevailed 3-1 against Bill Davis of the United States.
"I've had a hard time recently," said the 35-year-old. "My dad came everywhere with me on the circuit and it's a sad loss for me, my mum and the whole family."
"Diamond" Dave Askew struggled to a 3-2 win against qualifier Martin Burchell after being two sets up.
England's Alex Roy, seeded 29, overwhelmed Wales' Richie Burnett 3-0 in Thursday's final match.