Daryl Gurney got the defence of his Unibet Grand Prix title off to the perfect start with a 2-0 win over John Henderson at Citywest.
The Derry man, who saw off the Scot in last year's semi-final, won both sets 3-1 to book a round two meeting with Ron Meulenkamp of Holland on Tuesday.
"I was happy with the performance, the averages didn't matter, just as long as I got over the finish line," the world number five told RTE Sport.
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"John Henderson doesn't give up and gives you nothing lightly."
Meanwhile, Steve Lennon never got going against world number one Michael van Gerwen.
The 24-year-old Carlow man, making his debut at the tournament, lost 2-0 without winning a leg.
The Dutch man, a three-time winner in Dublin, averaged 92.97 and hit 86% of his double shots.
Van Gerwen will play Darren Webster, who accounted for Stephen Bunting, in round two.
Lennon told RTE Sport: "It was obviously a different experience, I haven't played in front of a crowd with such a massive following. I appreciate everyone who supported me but it's a pity I didn't play too well.
"I'll take this as a learning experience, it was a great experience."