Katie Taylor defended her world titles in convincing fashion with a unanimous points decision win over Cindy Serrano in Boston's TD Garden.
It was a mostly positive night for the Irish with Niall Kennedy and Sean McComb both adding wins to their emerging careers as well, though there was disappointment for James Tennyson who was defeated by TKO in his super-featherweight world title bout.
In the co-feature event Taylor showed a primetime American boxing audience all her skills as she won every round against the Puerto Rican.
The opening rounds saw little in the way of action as Taylor took the centre of the ring but struggled to pin down Serrano, who seemed content to stay out of harm's way.
The Bray woman started find to her range from the third round on, with Serrano's face particularly marked up by the middle of the contest.
Serrano had no answer for her speed and punch combinations and Taylor even began some uncharacteristic showboating in the seventh round.
Perhaps inspired by Conor McGregor at ringside, she put her hands behind her back and goaded Serrano into coming forward.
The closing rounds were merely an exhibition of Taylor's skills as she landed with accuracy again and again; the outclassed but durable Serrano doing well to last until the final bell.
All three judges scored it 100-90 in favour of Taylor, who retains her IBF and WBA Lightweight world titles with an 11th professional win.
Tennyson (above) suffered a career setback after losing his IBF Super-Featherweight world title shot by way of a fifth-round stoppage to Tevin Farmer.
The Philadelphia southpaw was proving somewhat elusive for the Belfast man through the early rounds and was landing his shots with more ease than a very game Tennyson.
A body shot from the champion sent Tennyson (22-3) down to take a count in the fourth round, and the writing was on the wall.
Farmer (27-4-1) again went after the body in the fifth, and after shaking Tennyson with one blow, another vicious strike to the body saw the challenger fall to his knees again.
At that point the referee waved the contest off to bring Tennyson's night to an early end.
Earlier, Wexford's Niall Kennedy won a unanimous points decision against New Jersey man Brendan Barrett over six rounds in their heavyweight contest.
Kennedy (12-0-1) used his superior boxing acumen to outsmart Barrett, who wanted to drag the Gorey Garda into a brawl. The American (7-1-2) did land one big right hand in the first round but Kennedy shook it off without showing any ill effects.
The former MMA fighter then received a warning after performing a judo trip on Kennedy in the second, with Kennedy maintaining his composure during some rough exchanges throughout.
Then in the fifth Kennedy had success with a combination of punches that saw Barrett hit the floor, though he survived to the bell by wrestling Kennedy for the rest of the round.
Kennedy was comfortable in the sixth and picked off some of his best shots as Barrett searched for the knockout that he needed. The judges scored it 60-53, 60-53, 58-55 in favour of the Irishman.
In the first bout of the evening three-time Irish amateur champion Sean McComb moved his professional record to 4-0 as he comfortably dispatched of Carlos Galindo by way of a stoppage in the third round.
The Belfast super-lightweight peppered his clumsy opponent with painful shots to the liver throughout, with the referee eventually calling an end to exchanges after Galindo took a knee for the second time in round three. McComb is back in action next weekend in New York.
In Las Vegas Michael Conlan made his record 9-0 with a seventh round stoppage of Nicola Cipolletta.
