Michael van Gerwen will face Michael 'Bully Boy' Smith in the knockout stage of the Grand Slam of Darts after they came through the group stage on Tuesday.
Smith eliminated Raymond van Barneveld with a 5-0 win to earn a crack at Van Gerwen.
Three-time champion Van Gerwen will be forced into the earlier-than-expected match against Smith because he was condemned to second-place in Group A.
Van Gerwen beat Joe Murnan 5-1 on Tuesday but Jonny Clayton, who upset the world's best player 48 hours earlier, topped the group by beating Gary Robson.
Van Gerwen would have been eliminated altogether had he not beaten Murnan, but stayed on course for a fourth consecutive title.
Smith then met Van Barneveld in a straight shoot-out to join Krzysztof Ratajski in qualifying from Group B, which he flew through.
"I won't duck a challenge," said Smith about facing Van Gerwen in the last 16. "It's a big ask but I won't duck that game. I'll prove a point."
Michael Unterbuchner of the BDO completed a sizeable upset by beating Ian White 5-3 and eliminating him. Unterbuchner and Gary Anderson progressed from their group.
The BDO's Wesley Harms eliminated Keegan Brown with a 5-4 win, and follows James Wade through.
Full results on Tuesday
James Wade 5-1 Mark Webster
Gary Anderson 5-1 Steve Hine
Ian White 3-5 Michael Unterbuchner
Keegan Brown 4-5 Wesley Harms
Michael van Gerwen 5-1 Joe Murnan
Gary Robson 3-5 Jonny Clayton
Krzysztof Ratajski 5-1 Adam Smith-Neale
Michael Smith 0-5 Raymond van Barneveld
The Grand Slam of Darts continues on Sky Sports across the week with the action getting underway on Wednesday on Sky Sports Action from 7pm.
Keep up to date with the news as the tungsten enters its busiest time of year with the PDC World Championships just around the corner get all the latest at sky.mnosports.com/darts and join in the conversation@SkySportsDarts.