Zug: Harold Mayot vs Mika Brunold

Platform comparison

Market context

Harold Mayot’s meeting with Mika Brunold in Zug is a straight head-to-head tennis contract, with the market effectively pricing a Mayot advance at **100% YES**. That lines up with the available match-specific history: the pair met in Zug on 25 July 2025, when Mayot won, leaving him with a 1-0 head-to-head edge in the limited sample now available[2]. A near-certain market on a single Challenger-level match is not unusual when one player has already beaten the other on the same event profile, but the crowd price leaves little room for any pre-match uncertainty[1][2].

For comparison, the sportsbook-style signal implied by the available live match pages is also strongly one-sided towards Mayot, while analyst-level consensus is thin because there is no broader multi-match dataset here beyond the direct head-to-head record[1][2]. Traders should still watch for the usual tennis contract catalysts: official start-time changes, any late withdrawal, and in-match retirement risk, because those are the events that can flip a settled winner contract into a 50-50 outcome if the match is not completed under the market rules. The key dependency is whether the fixture is actually played to a result before the settlement window closes on 30 July 2026[1].

Sources: 1 · 2

Methodology

We track Zug: Harold Mayot vs Mika Brunold across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Best Prediction Markets. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.