Terry Jenkins and Paul Nicholson both lost their final group games to become the latest big names to exit the Grand Slam of Darts.
Wes Newton comprehensively beat Jenkins to knock the 'Bull' out of the tournament while Nicholson was edged out 5-4 by Andy Hamilton.
Tony O'Shea missed three match darts against John Part as he lost the match 5-4 to hand the Canadian a place in the last 16.
He will now play Brendan Dolan after the 2011 Grand Prix runner-up whitewashed Barrie Bates 5-0.
Dutch duo Raymond van Barneveld and Wesley Harms will meet in the second round after they both recorded 5-2 victories over Wayne Jones and Martin Phillips respectively.
BDO world champion Christian Kist progressed despite a 5-4 loss to Mark Walsh, while Adrian Lewis, who was knocked out of the competition on Monday night, beat Gary Anderson by the same scoreline.
