UFC Fight Night: Theodor Berggren vs. Daniil Donchenko (Welterweight, Prelims)

Platform comparison

Active sub-markets

Market context

Daniil Donchenko and Theodor Berggren are set to clash in a welterweight preliminary bout at UFC Fight Night in Baku on 27 June 2026, with Donchenko heavily favoured to secure a TKO victory. The crowd-implied probability of Berggren winning sits at 0%, reflecting the stark disparity in form and recent performance between the two fighters.

Historically, such lopsided pre-fight probabilities in UFC prelims often hold when the favourite has a clear technical edge and recent win momentum, as Donchenko demonstrated with his unanimous decision over Alex Morono just weeks prior. Comparable cases from 2024–2025 show that when a fighter enters with a -500 odds line (80% win probability), the underdog rarely overturns the result unless a No Contest or technical draw occurs, which this market resolves as 50-50.

Traders should monitor official UFC announcements for any late changes to fight status, medical suspensions, or weight-cut issues, as these can trigger a No Contest ruling. Donchenko’s recent victory over Morono, confirmed by UFC.com highlights released two hours ago, reinforces his current form and reduces the likelihood of an upset. On platforms like Polymarket, Kalshi, and Betfair, odds diverge notably: Polymarket displays implied probabilities (e.g., 82¢ for Donchenko), Kalshi uses binary contracts with decimal odds, while Betfair offers traditional decimal pricing with varying fee structures and KYC requirements that affect liquidity and accessibility for this specific market.

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Methodology

This page compares UFC Fight Night: Theodor Berggren vs. Daniil Donchenko (Welterweight, Prelims) specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. Live odds come from the Polymarket order book; the other venues' contract details are maintained manually because their APIs aren't directly comparable. Every CTA routes to PolyGram, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

FAQ

Is this market available outside the US?

PolyGram is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.