Pierce O’Leary v Mark Chamberlain

THE BIG BANG, Pierce O’Leary, will once again be the star turn at the 3Arena in his home city of Dublin on Saturday August 1 when he goes up against Mark Chamberlain in a first defence of his IBO world super lightweight title, live on DAZN.The pair were originally set to deliver a potential thriller back in March before Chamberlain was forced out through illness, with O’Leary proceeding to captivate a packed house by defeating Maxi Hughes in the fifth round to become IBO world champion.

It was a first professional appearance in Dublin for the 26-year-old O’Leary (19-0, 11 KOs) and his popularity was perfectly illustrated by the ‘sold out’ signs being posted well in advance of fight night.

For southpaw Chamberlain (17-1-1, 12 KOs), from Waterlooville, this collision with O’Leary will represent his second major assignment at super lightweight, with him previously having been WBC Silver, WBA Intercontinental and IBF European champion at lightweight.

In his first title tilt at his new weight, the 27-year-old headed north to Altrincham to fight for the British and Commonwealth titles held by the undefeated Jack Rafferty. The judges couldn’t separate the pair after 12 rounds of non-stop action.

Now he takes up the challenge of O’Leary in his home city and, as the title of the show indicates, there will be ‘No Turning Back’.

Event and Cocktail Package

If you’re going to a event in Dublin, why not make it an extra special treat and book into The Address Citywest?

Our package includes the following:

  • Luxurious overnight accommodation
  • Signature cocktail before the concert
  • Full Irish breakfast in the morning
  • Complimentary Wi-Fi throughout the hotel

*Please note tickets to the concert are not included

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Date

Aug 01 2026

Local Time

  • Timezone: America/New_York
  • Date: Aug 01 2026

Location

3 Arena