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Teenager Luke Littler edged past Raymond van Barneveld 6-4 to scope nan past 8 of nan World Series of Darts finals successful Amsterdam.
Littler, 17, raced into a 3-1 lead against nan 57-year-old Dutchman but struggled to property location his advantage.
Van Barneveld trim nan shortage to 1 limb connected 3 occasions, earlier Littler clinched triumph pinch an 86 checkout successful nan 10th.
Littler will now look a quarter-final connected Sunday against chap Englishman Chris Dobey, who hit Croatia's Boris Krcmar 6-4.
World champion Luke Humphries is besides done aft a nervy 6-5 triumph complete Australia's Damon Heta.
Humphries will return connected defending champion Michael van Gerwen, who hit chap Dutchman Danny Noppert 6-3.
England's Rob Cross and compatriot Michael Smith some survived scares earlier besides reaching nan quarter-finals.
Dutchman Kevin Doets missed 4 lucifer darts erstwhile 5-3 up successful nan ninth limb against Cross, who past reeled disconnected 3 consecutive legs to advancement 6-5.
Another Dutchman, Wessel Nijman, missed 3 lucifer darts erstwhile 5-3 up against Smith, and a further 3 pinch nan lucifer level astatine 5-5, earlier nan world number 2 edged through.
Northern Ireland's Daryl Gurney hit Welshman Gerwyn Price 6-3 to group up a past 8 gathering pinch Scotland's Peter Wright, who hit Canada's Jeff Smith 6-2.