De Zwaan hit a 106 average with 53 percent on the doubles and he believes that his confidence on the stage is what brought him through.
This confidence is what has now made him think that he can win the World Champion and he believes if he keeps playing like that it’s a possibility.
"It felt amazing to play like that and to beat a great player in Dave Chisnall," said De Zwaan.
"I wasn't actually playing that well in practice but the confidence was there on stage and that's what you must have to beat a player like Dave.
"I know if I play like that all the time I can be World Champion, but I don't want to think about that yet.
"Darts is all in the moment so you can't expect to average 106 in every game so we'll see what happens."
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