O’Leary vs Chamberlain: UK Time, Ringwalks, Odds & Prediction

Who wins: O'Leary v Chamberlain?

By Ben | Split Decision
Updated: June 9, 2026, 17:00 BST
Published: May 26, 2026, 12:00 BST

Pierce O’Leary finally gets the Mark Chamberlain fight he expected earlier this year. O’Leary, 19-0 with 11 KOs, defends his IBO world super-lightweight title against Chamberlain, 17-1-1 with 12 KOs, at the 3Arena in Dublin on Saturday, August 1, 2026. The fight is live on DAZN, with main event ringwalks expected at around 22:00 BST.

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Will Tyson Fury fight on the O’Leary vs Chamberlain undercard?

Tyson Fury has strongly hinted at a Dublin return on August 1, posting “August 1, Dublin, Ireland” from training camp. With Queensberry already promoting O’Leary vs Chamberlain at the 3Arena on the same date, that immediately pointed attention towards this card.

For now, though, Fury has not been officially confirmed for the undercard and no opponent has been named. Until Queensberry announces the fight, O’Leary vs Chamberlain remains the confirmed main event, with any Fury involvement still a developing story.

Why O’Leary vs Chamberlain matters

The original March date should have been O’Leary’s homecoming centrepiece. He was born and raised on Sheriff Street, just fifty metres from the 3Arena, and had prepared to fight for his first world title in front of a sold-out Dublin crowd.

Then the fight collapsed. Chamberlain went into hospital on an antibiotic drip two weeks before fight night, so Maxi Hughes stepped in at short notice. O’Leary took the chance anyway and stopped Hughes inside five rounds to win the vacant IBO belt. Now Chamberlain gets his second chance. He has spent four months watching another man hold the title he expected to fight for.

Frank Warren made the promotional angle clear on announcement day. He said: “This is a fight we simply had to get done. Everyone was so excited by the prospect of it back in March, so we just couldn’t let it pass by.” This time, the promoter’s pitch feels fair. Both men can punch. Neither has been stopped. Also, both entered fight week ranked by the WBC.

O’Leary sits at No.5, while Chamberlain is No.12 in the May 2026 WBC listings. As a result, the winner leaves Dublin with the IBO belt and a stronger route towards Dalton Smith’s WBC title. Have a look at our latest super-lightweight rankings to see where each man sits heading into fight week.

Minimalist boxing poster for Pierce O’Leary vs Mark Chamberlain featuring two anonymous boxer silhouettes facing each other against an off-white background, with bold black typography, red accent lines, fight records, and Split Decision branding for the IBO World Super-Lightweight Title.

When is O’Leary vs Chamberlain? UK time and date

The fight takes place on Saturday 1 August 2026 at the 3Arena, Dublin. The Queensberry show is titled “No Turning Back” and is O’Leary’s first defence of the IBO belt he won in March. UK broadcast picks up live on DAZN mid-evening, with the main event landing late.

O’Leary vs Chamberlain Full Fight Card

The full undercard has not yet been confirmed by Queensberry. The promotion has stated only that the bill will feature “several Irish fighters” alongside the main event, with chief support and prospect slots typically named four to six weeks out from fight night.

The March 2026 3Arena card carried twelve bouts in total, including the debuts of Irish prospects Bobbi Flood and Adam Olaniyan, so a similar depth of programming is expected.

Will Tyson Fury fight on the O’Leary vs Chamberlain undercard?

Tyson Fury has now strongly hinted at a Dublin return on August 1, posting “August 1, Dublin, Ireland” from training camp. With Queensberry already promoting O’Leary vs Chamberlain at the 3Arena on that exact date, it is difficult to see this being a separate show. Unless plans change, the logical expectation is that Fury is being lined up for the same bill, which would turn O’Leary’s IBO title defence into part of a much larger Dublin fight night.

Where to watch O’Leary vs Chamberlain: TV channel, DAZN and streaming

The card streams live on DAZN in the UK and Ireland. At the time of writing it is listed as a regular DAZN broadcast rather than a separate DAZN PPV, so a standard subscription should cover access unless DAZN announces otherwise closer to fight week.

DAZN also runs an Ultimate tier in the UK, which bundles selected PPVs, minimum 12 per year, at no extra cost. That tier is worth considering if you regularly buy DAZN PPV events. Otherwise, a Standard subscription gives access to 185+ fight nights annually, with PPVs available as paid add-ons.

You can sign up to DAZN through our affiliate link. Same price to you, whilst supporting the site.

O’Leary vs Chamberlain ringwalk UK time

Main event ringwalks are pencilled in for approximately 22:00 BST on Saturday 1 August. The DAZN broadcast is expected to open around 18:00 BST, with chief support landing around 21:00 BST. Final timings depend on undercard finishes and will be confirmed by the broadcaster on fight week.

O’Leary vs Chamberlain Tale of the Tape and Breakdown

Pierce O’Leary:

Mark Chamberlain:

Pierce O’Leary recent form

Mark Chamberlain recent form

Our analyst’s prediction

O’Leary himself sounds unbothered by the southpaw assignment, saying “we’ll adapt quick – it’s nothing I haven’t seen”, and he had Josh Taylor in his camp as recently as last year sharpening that side of his game.

Tactically, O’Leary needs to seize the centre of the ring early and force Chamberlain backwards, where the left hand has less platform to torque off. Chamberlain, by contrast, has to make this an awkward, mid-range scrap, use his feints to mask entries, and back O’Leary up to give the southpaw cross a clean lane.

If the fight settles into a measured rhythm through six, the home crowd and the reliable Irish jab should carry O’Leary on the cards. However, if Chamberlain lands clean early and tests a chin that nobody has properly tested at this level, the night opens up.

Split Decision backs O’Leary by stoppage, rounds 8-10. The cleaner technical work, the home advantage, and Chamberlain’s question marks at the higher weight tilt this in his favour once he reads the southpaw lines. Still, this is the most dangerous opponent of his career, and years of “Big Bang” momentum cannot quite mask the fact that the Englishman has a real chance.

O’Leary vs Chamberlain odds

O’Leary remains the favourite, with Sky Bet listing him at 4/6, Chamberlain at 13/10, and the draw at 16/1 at the time of writing.

That tells its own story. O’Leary has the belt, the unbeaten record and the Dublin crowd, but the books are treating Chamberlain as a live threat rather than a ceremonial first defence. The southpaw stance, the extra height, and the fact neither man has been stopped all help explain why this is priced closer than a routine champion’s homecoming.

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