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UFC Fight Night: Serghei Spivac vs. Vitor Petrino (Heavyweight, Main Card)
polymarket
kalshi

What is the result of Spivac vs Petrino?

Volume:
$3,685,892

Vitor Petrino

all

2 markets

Kalshi

Polymarket

consensus

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Aug 23, 2026

Closed: Aug 22, 10:14 PM EST

kalshi

Kalshi

View
Join Kalshi and score $25 for your first trade.
Outcome
Trade
Chance %
Price
Spread
Liquidity
Volume
24h
7d
Open Interest
Ends in
Result
kalshi

Vitor Petrino

View
100%
41%
Yes 100¢No 0¢
100¢
N/A
$1,626,783
N/A
N/A
$1,201,230
Settled
Yes
polymarket

Serghei Spivac vs. Vitor Petrino

View
0%
Yes 0¢No 100¢
—
N/A
$567,450
N/A
N/A
N/A
Settled
Yes
polymarket

Fight to Go the Distance?

View
100%
61%
Yes 100¢No 0¢
0.1¢
N/A
$16,805
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 1.5 Rounds

View
100%
36%
Yes 100¢No 0¢
0.1¢
N/A
$3,659
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 2.5 Rounds

View
100%
46%
Yes 100¢No 0¢
0.1¢
N/A
$1,611
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 0.5 Rounds

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$5
N/A
N/A
N/A
Settled
Yes
kalshi

Serghei Spivac

View
0%
Yes 0¢No 100¢
100¢
N/A
$1,466,883
N/A
N/A
$1,205,615
Settled
No
polymarket

Fight won by KO/TKO?

View
0%
58%
Yes 0¢No 100¢
—
N/A
$1,436
N/A
N/A
N/A
Settled
No
polymarket

Fight won by submission?

View
0%
39%
Yes 0¢No 100¢
—
N/A
$998
N/A
N/A
N/A
Settled
No
polymarket

Spivac to win by KO/TKO?

View
0%
20%
Yes 0¢No 100¢
—
N/A
$140
N/A
N/A
N/A
Settled
No
polymarket

Petrino to win by KO/TKO?

View
0%
38%
Yes 0¢No 100¢
—
N/A
$125
N/A
N/A
N/A
Settled
No
Total markets: 11

Intro

This market tracks whether the UFC Fight Night bout between Serghei Spivac and Vitor Petrino will last over or under 0.5 rounds. The aggregated consensus probability for the leading outcome, O/U 0.5 Rounds, is 96.0%, combining data from Polymarket and Kalshi, with resolution based on official information from the UFC. Watch for the fight's conclusion on August 22, 2026, to confirm the final result.

PredictionHero - Resolution Divergence Alerts (RDA)

Unified Resolution Criteria (Consistent across platforms)

All markets across Polymarket and Kalshi resolve based on the same official UFC result and use consistent criteria for outcomes such as win conditions, method of victory, and round thresholds.Primary resolution logic: Official information from the UFC

Core resolution logic:

  • The fight winner is determined by the UFC's official declaration.
  • Methods of victory (KO/TKO, submission) are determined by UFC's official announcement.
  • Rounds lasted are measured by official round timing from the UFC.
  • Cancellations or postponements beyond September 5, 2026, result in 50-50 resolution for all markets.

Edge cases & clarifications:

  • Draw or No Contest: Results in 'No' for method-specific markets and '50-50' for markets sensitive to fight completion.
  • Exact Threshold: If a round ends exactly at the threshold (e.g., 2:30 mark), it resolves to 50-50 for over/under round markets.
Timing: Resolution occurs after the official UFC announcement of the fight result, no later than September 5, 2026.Our PredictionHero Resolution Divergence Alerts (RDA) are there to help users identify potential differences across platforms. They do not replace or supersede the official rules and description of any prediction market. Users are solely responsible for reviewing and understanding the applicable rules and resolution criteria before placing any trade or bet. If you notice a potential inconsistency, discrepancy, or error in an alert, please report it to our team so we can review and improve the accuracy of our data.

Polymarket

This market will resolve to "Serghei Spivac" if Serghei Spivac is officially declared the winner of the fight against Vitor Petrino at UFC Fight Night: Hernandez vs. Rodrigues, scheduled for August 22, 2026. It will resolve to "Vitor Petrino" if Vitor Petrino is officially declared the winner. If the fight is declared a draw or technical draw, ruled a No Contest, not scored, canceled, or postponed beyond September 5, 2026, this market will resolve "50-50." The resolution source for this market will be official information from the UFC.

Kalshi

The markets resolve based on the winner of the Spivac vs Petrino professional MMA fight originally scheduled for Aug 22, 2026. If the fight is postponed or delayed, the markets remain open and close after the rescheduled fight concludes, provided it occurs within two weeks of the original date. If the fight ends in a tie or is declared a no contest, both markets resolve at 50/50. If the fight is canceled or rescheduled to more than two weeks after the original date, the markets resolve to a fair price as determined by the rules. These markets are not endorsed by Zuffa LLC, d/b/a Ultimate Fighting Championship, and any references to the UFC are purely descriptive.

Frequently asked questions

The dashboard for the Spivac vs Petrino fight market aggregates betting activity across multiple venues, showing real-time volume of $3,685,892 and 24-hour volume of $3,552,871. It tracks how trader sentiment shifts as the event approaches, reflecting the latest consensus on who might win. This cross-platform view lets users see how odds evolve on different prediction markets, giving a clearer picture of where the smart money is placed ahead of the fight.

On Polymarket, this market is priced through user-driven trading, which often differs from traditional sportsbook lines due to sharper, real-time adjustments. Prediction markets reflect aggregated trader sentiment and can show wider or narrower spreads than sportsbooks, depending on recent performance data and public perception. The gap between these odds and sportsbook lines may also shift with new fight announcements, training updates, or betting trends. For the Spivac vs Petrino fight market, traders might price in factors sportsbooks weigh less heavily, such as in-cage strategy shifts or injury reports.

On Polymarket and Kalshi, this market can diverge because each platform hosts its own user base and liquidity pool, leading to varied pricing dynamics. Polymarket and Kalshi can show different implied probabilities for the same outcome because of liquidity, fee structure, participant mix, and how each venue defines the contract. For example, differing trading volumes or user sentiment on each venue may push probabilities in distinct directions. Additionally, each platform may have unique market designs or fee structures that affect how traders place bets, further widening the gap between the two sites for the Spivac vs Petrino fight market.