Pierce O'Leary and Mark Chamberlain finally meet this Saturday, August 1, at Dublin's 3Arena, five months after a chest infection forced Chamberlain out of their original St. Patrick's Day Weekend date. Queensberry Promotions

The fight — billed as "No Turning Back" — is for the IBO light-welterweight belt, a recognised international title that sits just outside the four major sanctioning bodies but carries genuine credibility at 140 pounds. It serves as the co-main event, the chief support bout beneath a headline attraction. Queensberry Promotions

Chamberlain's withdrawal in March opened the door for Maxi Hughes to step in as a late replacement against O'Leary. O'Leary, fighting under the nickname "Big Bang," dispatched Hughes inside five rounds — a statement performance that kept his unbeaten record intact and sharpened anticipation for the bout that got away. BBC Sport

Now the original matchup is back on. O'Leary, undefeated, faces a man desperate to become the first to beat him. Chamberlain, a 27-year-old from Portsmouth, brings a professional record of 17 wins and 1 defeat. He arrives with momentum of his own: his last fight against Jack Rafferty ended in a draw and was widely described as a fight-of-the-year contender. BBC Sport

O'Leary expects a capacity crowd at the 3Arena, and the venue's schedule reflects the scale of the occasion. Doors open at 4:00 pm on fight day, with Wasserman Boxing listed as the event promoter on the 3Arena website and Queensberry Promotions running a dedicated event page. The fight will be broadcast live on DAZN. 3Arena

For O'Leary, fighting in Dublin is a homecoming with a title on the line. For Chamberlain, it is a long-delayed opportunity to prove himself on someone else's patch. The five-month detour only added layers to a fight that already had plenty.