Craig Young took five scalps as Ireland eased to a comfortable seven-wicket win over Scotland in the first One Day International in Dublin.
The 24-year-old medium-pacer helped limit the tourists at The Village in Malahide to 172 runs with figures of 5-46 on their way to being bowled out with nine overs remaining.
Ireland comfortably beat that total when Kevin O'Brien's unbeaten half-century (56 not out) saw them home with plenty to spare as they finished on 173-3.
The Scots got off to a disappointing start as they lost Matty Cross for just nine runs after he edged Max Sorensen's delivery to wicket-keeper Stuart Poynter.
Young then made his introduction as he took Calum MacLeod (25) and Hamish Gardiner (10) in quick succession.
The Derry bowler took his third when he clean bowled Preston Mommsen (10) to leave the Scots in trouble at 62 for four.
Michael Leask offered some resistance as he finished off a tidy 50 but when he and Safyaan Sharif (18) also fell to Young, Scotland's hopes of posting a more challenging tally were done for.
The Irish got off to a steady start in reply and took their time building their response.
They had scored just 11 runs when Iain Wardlaw took Scotland's first wicket as John Anderson was trapped lbw, but the hosts stepped things up after lunch.
The 39-run partnership between Andrew Balbirnie (38) and Andrew Poynter (16) put them in control before the latter was caught by Cross with Ireland just shy of the 50-mark.
But that only marked O'Brien's arrival and his 56 not-out was the catalyst for victory, with the Surrey batsman flicking home two runs at the end to confirm the win with 13 overs remaining.
The teams meet again on Wednesday before Friday's final ODI.