How the seeded players crashed outpublished at 20:17 British Summer Time
In the 32-player tournament, the top eight ranked players were seeded. On paper, that was set to make them have more favourable paths in the competition.
But only three seeds made the quarter-finals after a series of shocks.
Former world champions Michael Smith and Michael van Gerwen were both dumped out in the first round, while Gerwyn Price, Nathan Aspinall and Dave Chisnall were second round losers.
Luke Humphries was the only seeded player to make it out of the quarter-finals, beating eighth-ranked Jonny Clayton. Fourth seed Rob Cross was knocked out at the last eight stage by Ryan Joyce.
Joyce, Mike de Decker and Dimitri Van den Bergh were the three unseeded players to join Humphries in the semi-finals.