Nikita “The Butcher” Tszyu returns to his adopted hometown of Newcastle on May 6, 2026 with everything to prove. The unbeaten Australian junior middleweight puts his WBO and IBF World titles on the line against Spain’s unbeaten challenger Oscar “El Toro” Diaz — a fight made all the more compelling by the chaos that has surrounded Tszyu since his controversial no-contest against Michael Zerafa in January. This is Tszyu’s statement fight.
| Date | May 6, 2026 |
| Venue | Newcastle Entertainment Centre, NSW, Australia |
| Promotion | No Limit Boxing |
| Division | Junior Middleweight (Super Welterweight) |
| Rounds | 10 |
| Titles | WBO & IBF World Junior Middleweight Championships |
| Broadcast | Kayo Sports (Australia PPV) |
Nikita Tszyu (11-0, 9 KOs) is one of boxing’s most naturally gifted heavyhands — 81.8% of his wins have come by stoppage, a number that immediately tells you what this man does for a living. The 27-year-old Australian southpaw stands 5’10” and has compiled his entire record in just 48 career rounds, averaging fewer than 5 rounds per fight. He doesn’t need long to find the finish.
The January no-contest against Michael Zerafa left a cloud over Tszyu’s name — the fight was waved off in the first round due to a head clash, the Newcastle crowd booed, and the situation was compounded by the widely publicised family rift that has kept his brother Tim out of the corner. But in a perverse way, that night steeled Tszyu’s resolve. He has returned to his stronghold city, and he needs a statement.
Oscar Diaz (16-0, 6 KOs) is the real deal. The 24-year-old Spaniard has quietly built an impressive résumé under the radar: he’s gone 12 full rounds, he’s been tested, and he’s passed every test — including two wins over Eduardo Gurria. His 37.5% KO rate is modest compared to Tszyu’s, but Diaz wins on volume and ring generalship, accumulating rounds and outboxing opponents over distance.
This is his first fight outside Spain — a significant step up in atmosphere and hostile crowd dynamics. But a fighter who travels to Australia to challenge for two world titles in someone else’s backyard is not short on confidence. Diaz has openly stated he’s targeting a future fight with Tim Tszyu once he takes Nikita’s belts. Bold or foolish — we’ll find out on May 6.
| Nikita Tszyu | Oscar Diaz | |
|---|---|---|
| Age | 27 | 24 |
| Record | 11-0 | 16-0 |
| KOs | 9 (81.8%) | 6 (37.5%) |
| Height | 5’10” | 5’10” |
| Stance | Southpaw | Orthodox |
| Career Rounds | 48 | ~110 |
Nikita Tszyu — Last 5 Fights
| Result | Opponent | Method | Rnd |
|---|---|---|---|
| NC | Michael Zerafa | Head clash | 1 |
| W | Hamza Ismaili | UD | 10 |
| W | Ben Mazoudier | TKO | 9 |
| W | Steve Creati | UD | 10 |
| W | Brock Biggs | TKO | 5 |
Oscar Diaz — Last 4 Fights
| Result | Opponent | Method | Rnd |
|---|---|---|---|
| W | Yosvany Di Stefano | UD | 10 |
| W | Ayoub Ennachat | PTS | 10 |
| W | Eduardo Gurria II | UD | 12 |
| W | Eduardo Gurria | KO | 8 |
This is a classic pressure puncher vs. slick boxer setup — which is exactly why it’s so intriguing.
Tszyu brings elite stopping power and a southpaw angle that troubles orthodox fighters. He comes forward with bad intentions, looking to plant and unload. When he lands flush, fights end — his 48-round career record tells you opponents rarely make it to the final bell. The southpaw vs. orthodox dynamic amplifies his danger: his left hand — the power hand — lines up naturally over Diaz’s right jab, meaning Tszyu’s crosses carry additional alignment advantage.
Diaz is the antithesis. He boxes behind his jab, moves intelligently, and piles up rounds on the scorecards. His second win over Gurria — 12 rounds of disciplined boxing — demonstrated the kind of ring generalship that causes real problems for aggressive punchers who need to close distance. In that fight, Diaz was never hurt and never stopped working. He can go deep.
The critical question: can Diaz survive Tszyu’s early pressure long enough to impose his own rhythm? Every round Tszyu doesn’t land clean is a round that tips the balance toward the challenger.
Nikita Tszyu wins if:
Oscar Diaz wins if:
| UK Odds | US Odds | |
|---|---|---|
| Nikita Tszyu | 2/13 | -670 |
| Oscar Diaz | 4/1 | +400 |
The odds paint a clear picture, and for good reason — Tszyu’s power is generational. But this is a 10-round fight, not a foregone conclusion, and Diaz has the style and the résumé to make it uncomfortable.
Our prediction: Nikita Tszyu by TKO, Rounds 6-8. Diaz will box well early, use his footwork to avoid the big shots, and frustrate Tszyu through the first half. But Tszyu’s punching power is simply too much over 10 rounds. Once he pins Diaz down in the second half, the finishing sequence will be clinical. The Newcastle crowd gets the moment they missed in January.
| Country | Broadcaster | Time |
|---|---|---|
| 🇦🇺 Australia | Kayo Sports (PPV) | 10:00 PM AEST (May 6) |
| 🇬🇧 UK | TBC | ~1:00 PM BST |
| 🇺🇸 US | TBC | ~8:00 AM ET |
UK and US broadcast details were not confirmed at time of writing. Check your local listings closer to the date.
With two world titles, a controversial no-contest to erase, and a family subplot that has followed him everywhere — this is more than a routine title defence. It’s Nikita Tszyu fighting for his reputation on the biggest stage he’s headlined. The Butcher needs to do what he does best.
When is Nikita Tszyu vs Oscar Diaz? The fight takes place on May 6, 2026 at the Newcastle Entertainment Centre in Newcastle, NSW, Australia.
What titles are on the line in Tszyu vs Diaz? Nikita Tszyu’s WBO and IBF World Junior Middleweight Championships are both on the line.
How can I watch Tszyu vs Diaz? In Australia, the fight is broadcast on Kayo Sports (PPV). UK and US broadcast details had not been confirmed at time of writing — check local listings closer to the date.
What are the betting odds for Tszyu vs Diaz? Tszyu is the heavy favourite at 2/13 (UK) / -670 (US). Diaz is the underdog at 4/1 (UK) / +400 (US).
What are Nikita Tszyu’s key strengths? Tszyu’s 81.8% knockout rate and southpaw power make him one of the most dangerous punchers in the junior middleweight division. He is aggressive, pressure-based, and has finished 9 of his 11 opponents — all within the scheduled distance.
What are Oscar Diaz’s key strengths? Diaz is a slick, high-volume boxer with excellent ring craft. His 16-0 record includes a 12-round unanimous decision win, proving he can go the full championship distance and outwork opponents over the course of a full fight.
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