A defeat to Christina Kim saw Leona Maguire miss out on the knockout stages of the LPGA Matchplay at Shadow Creek in Las Vegas.
In a see-saw encounter Maguire was 1up at the turn, but Kim then took control by winning 11, 13 and 15. The Cavan competitor then hit back to win the 17th, before both players birdied the last, to leave Kim the winner 1up.
Elsewhere Bronte Law comfortably won her final round-robin match against America's Annie Park 6&5 to progress to the knockouts, topping her group with two wins and a tie.
World number two Park In-bee clinched her group with a 2&1 victory over Mexico's Gaby Lopez.