James Wade charged through to the last 16 with a 9-2 demolition of Dave Chisnall on Saturday afternoon in Bolton.
The 30-year-old, who won the tournament in 2008 and 2011, defeated the world number nine with apparent ease thanks to some clinical finishing.
Wade, who has already won five games in the last three days, will find his opponent for Saturday evening’s fifth round when the draw takes place at the end of the afternoon session.
“I’m happy with my results so far and if I step my performance levels up a little bit I can beat anyone,” said Wade, the world number four.
“It’s not about this tournament or any individual tournament for me. It is all about getting things right for a good future in the modern era of darts.
“I’m looking forward to my next game, whoever it is against, and that is all I’m going to concentrate on at the moment.”
Wade took out finishes of 97, 103 and 120 as he stormed into a 6-1 lead with before a 180 helped Chisnall halt his charge.
By Chris Murphy