Overview
- Mark Chamberlain defeated Pierce O'Leary by TKO in the 10th round at Dublin's 3Arena on Saturday to win the IBO super‑lightweight title.
- The fight featured multiple knockdowns with Chamberlain flooring O'Leary in rounds two and three, O'Leary dropping Chamberlain with a body shot in round seven, and Chamberlain finishing the fight in round ten.
- The match had been rescheduled from March after Chamberlain withdrew with a chest infection, and O'Leary defended the belt that month against late substitute Maxi Hughes.
- The bout was shown live on DAZN, promoted by Queensberry/Frank Warren, drew a raucous home crowd and attracted boxing figures ringside, including Steve Collins, Prince Naseem Hamed and Carl Frampton.
- Chamberlain moves to 18–1 and gets a major career boost from the win while O'Leary suffers his first professional loss; on the same card Royston Barney‑Smith beat Reece Bellotti to claim the vacant IBO intercontinental belt.