Northern Ireland athlete Jason Harvey ran a season's best time in the 400m hurdles at the Morton Games in Dublin.
The 23-year-old, who will compete in the Commonwealth Games in Glasgow, clocked 50.64 seconds in coming fourth behind winner Thomas Barr (48.94).
Lagan Valley's Katie Kirk was just outside her personal best time of 2:02.91 as she finished sixth in the international women's 800m in 2:02.86.
American Phoebe Wright came home first in 2:01.91.
Harvey bettered his previous best this season of 50.79, which he set just last week while running for Liverpool Harriers at a British League meeting at Copthall, London.
He has also qualified to run for Ireland in the European Championships in Zurich.
Harvey plans to compete in the Irish National Senior Championships before heading to Scotland.
Irish champion Barr, from Waterford, was in fine form at Santry Stadium on Friday evening as he took victory in a new stadium record time, breaking the 14-year-old benchmark.
Barr got the better of reigning world champion Jehue Gordon on the home straight.
Meanwhile the third Northern Ireland Commonwealth Games competitor taking part on Friday night, Daniel Mooney, was 12th in the men's mile in a time of 4 minutes 0.79 seconds.
The Portrush native, who runs for the Letterkenny club, is entered for the 800m and 1500m in Glasgow.
American Will Lear secured his third Morton mile title in 3:51.82 while Irish athlete John Travers went under the four-minute barrier for the first time as he clocked 3:55.44 as he finished sixth.
Travers was clocked at 3:37.37 at the 1500m mark which is well under the European Championship qualifying standard of 3:39.10.
Cork athlete Ciaran O'Lionaird led the race with 250 metres to go but faded to finish just behind Mooney in 4:00.88.
Ireland's Mark English became the second athlete to break a stadium record on the night when he won the 800m in 1:45.30 as he finished ahead of American Ryan Martin [1:45.79] and Australian Ryan Gregson [1:46.27] with another Irishman Paul Robinson [1:46.40] in fourth.