Longford's Cian McPhillips announced himself as a potential star when taking victory in the junior mile at the Millrose Games in New York on Saturday.
The 17-year-old powered to the lead on the penultimate lap and clocked 4:10.95 to leave many of the best American teenage milers in his wake. It continues a breakthrough season for McPhillips, who recently broke the Irish Under-20 indoor 1,500m record with his 3:44.85 in Athlone last month.
The key to his breakthrough?
"Consistency," he said. "I've been taking things more serious than usual."
He will race over a mile in Athlone next week where he hopes to run "around 4:01, 4:02", before taking on his elders at the National Senior Indoors in late February.
Andrew Coscoran was also in action in New York, the 23-year-old given a late call-up to the Wanamaker Mile, where he finished 10th in 3:57.83. The race was won by Britain's Chris O'Hare in 3:55.61.
"They're like lions," said Coscoran of his first experience at this level. "But one line I kept saying to myself, 'You've got to commit, top three or die'."
The race closed out an impressive block of racing stateside for Coscoran, who clocked a huge 1,500m PB of 3:37.98 in Boston a week ago. "I need a break now and to get a block of training in," said Coscoran.
"We're in a position to make the Olympics. Now that I've run 3:37 indoors, it's definitely doable."
There were worrying signs for Mark English on his seasonal debut, the three-time European medallist unable to go with the pace in the men's 800m and trailing home last in 1:52.94 - a race won by world champion Donavan Brazier in 1:44.22.
English was at a loss to explain his performance in the immediate aftermath but he recently dealt with a hamstring issue and had just returned from a spell of altitude training in South Africa.
Elsewhere, Rhasidat Adeleke was in flying form at the AAI Games, the 17-year-old lowering her personal best over 60metres to 7.36 seconds.