Tucked beneath one of the most anticipated heavyweight title fights in recent British boxing memory, Constantin Ursu and Ben Vaughan will produce fireworks of their own when the unbeaten Moldovan Monster defends his British and Commonwealth welterweight titles at the O2 Arena on Saturday August 29, 2026. Both men are southpaws, both carry genuine stoppage power, and neither has been beaten on British soil — making this a fiercely competitive domestic showdown in front of a capacity London crowd.
| Date | Saturday, August 29, 2026 |
| Venue | O2 Arena, Greenwich, London |
| Promotion | Queensberry Promotions |
| Broadcast | DAZN |
| Titles | British & Commonwealth Welterweight Championships |
| Scheduled Rounds | 12 × 3 minutes |
Constantin Ursu (15-0, 5 KOs) was born in 2000 in Moldova and moved to England to pursue his professional career. Known as “The Moldovan Monster”, he stands 5’11” (182cm) and fights out of a southpaw stance, using his range and work-rate to wear opponents down over twelve rounds. He turned professional in 2019 and has yet to taste defeat.
Ursu claimed the British and Commonwealth welterweight titles in February 2026, outpointing Owen Cooper by unanimous decision across twelve hard rounds at Vaillant Live in Derby — the scorecards reading 110-118, 110-118, and 112-116 told a story of a controlled, volume-based performance where Ursu kept the pressure on throughout. He is the 97% favourite with the Tapology community.
Before that title win, he grinded out a twelve-round unanimous decision over Ryan Amos at York Hall in November 2025, cementing his reputation as a relentless, durable welterweight who is very hard to stop. He has been stopped zero times in his career.
| Date | Opponent | Result | Method | Rnd |
|---|---|---|---|---|
| Feb 2026 | Owen Cooper | W | UD | R12 |
| Nov 2025 | Ryan Amos | W | UD | R12 |
Ben Vaughan (12-2, 3 KOs) “The Bomber” from Northampton is 27 years old, stands 5’9” (177cm), and also fights out of a southpaw stance — making this an all-southpaw domestic title fight. He turned professional in 2021 and brings 12 fights of experience to the O2.
Vaughan’s two losses have both come against elite domestic-level opponents at world-level distances: a majority decision loss to Ekow Essuman over ten rounds in November 2024, and a close majority decision loss to Bobby Dalton over ten rounds at Kings Hall in July 2025. Both defeats could reasonably have gone either way. Since the Dalton setback, Vaughan bounced back emphatically with a first-round stoppage of Alexeyv Arellano in December 2025, demonstrating that his power is very much intact.
He arrives here as a significant underdog at +800 (US moneyline), but should not be discounted. The southpaw-on-southpaw dynamic will remove one of Ursu’s natural advantages, and Vaughan showed against Essuman that he can take a top-level welterweight twelve rounds.
| Date | Opponent | Result | Method | Rnd |
|---|---|---|---|---|
| Dec 2025 | Alexeyv Arellano | W | TKO | R1 |
| Jul 2025 | Bobby Dalton | L | MD | R10 |
| Nov 2024 | Ekow Essuman | L | MD | R10 |
| Ursu | Vaughan | |
|---|---|---|
| Age | 26 | 27 |
| Record | 15-0 | 12-2 |
| KO Rate | 33% | 27% |
| Height | 5’11” / 182cm | 5’9” / 177cm |
| Stance | Southpaw | Southpaw |
| Debut | 2019 | 2021 |
| Nationality | Moldova | England |
An all-southpaw welterweight title fight creates a fascinating tactical contest. Both men lead with the right hand, both expose their left sides to each other’s right jab, and neither can use the traditional southpaw angles against an orthodox opponent.
Ursu is the more methodical of the two — his recent performances against Cooper and Amos revealed a fighter who controls distance, banks rounds consistently, and rarely makes significant errors. His output volume is high and his ability to absorb pressure without going backwards is notable. He has twelve rounds of experience at championship distance, which Vaughan does not yet have at this weight.
Vaughan will need to disrupt that rhythm. His first-round finish of Arellano shows he can end things early, and if he can impose his own timing in the opening rounds, he has a puncher’s chance. His challenge is that Ursu’s defensive discipline — evidenced by a zero-stoppage defensive record — makes early fireworks unlikely.
The two-inch height advantage that Ursu holds matters less in a southpaw mirror matchup than it would against an orthodox opponent, but his longer professional campaign and superior championship experience remain meaningful edges.
Ursu is priced around -2000 (massive favourite) against Vaughan at +800. The gap in the odds reflects the gulf in experience at championship level, Ursu’s unbeaten record, and the fact that his zero stoppages sustained suggest a chin that is genuinely difficult to test.
The most likely outcome is a Ursu points victory, continuing the patient accumulation of rounds that characterised his Cooper and Amos fights. Vaughan’s best chance comes in the early rounds before Ursu gets into his rhythm, but the champion’s defensive solidity makes a stoppage win for the challenger a long shot.
Prediction: Constantin Ursu by unanimous decision. The Moldovan Monster retains his titles via a disciplined, measured points win over twelve rounds — Vaughan will be competitive, particularly in the mid-rounds, but Ursu’s experience and consistency carry the night.
UK: DAZN — undercard from approximately 7pm BST US: DAZN — undercard from approximately 2pm ET / 11am PT
This welterweight title clash sits on an excellent Queensberry card at the O2 Arena:
What titles are at stake in Ursu vs Vaughan? The British and Commonwealth welterweight championships, both held by Constantin Ursu going into the fight.
What is Constantin Ursu’s professional record? 15-0 (5 KOs) at the time of this fight. He has never been stopped in his professional career.
Who is the favourite to win Ursu vs Vaughan? Ursu is a very heavy favourite, priced around -2000 on US moneylines, with Vaughan at +800.
Have Ursu and Vaughan fought before? No — this is their first meeting.
Where is the Ursu vs Vaughan fight taking place? The O2 Arena in Greenwich, London, on the undercard of Itauma vs Hrgovic on Saturday August 29, 2026.
What is Ben Vaughan’s record? 12-2 (3 KOs). His two losses were narrow majority decisions against Ekow Essuman and Bobby Dalton.
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