Kingston: Harold Mayot vs Gustavo Heide

Platform comparison

Market context

Harold Mayot and Gustavo Heide are scheduled to compete in the Kingston ATP 250 tournament on 17 August 2026. The market currently reflects 100% implied probability for Mayot's advancement, suggesting either overwhelming confidence in his form or minimal trading activity. The settlement window extends to 24 August, allowing a seven-day buffer for rescheduling before the contract resolves to a 50-50 split.

Mayot, a French player ranked in the mid-200s, has shown inconsistent results on the ATP circuit with occasional qualifying runs and main-draw appearances at lower-tier events. Heide, an Argentine competitor, similarly operates at the fringe of professional tennis with limited ATP exposure. Historical precedent from comparable matches between players of this ranking band suggests that pre-match odds typically reflect recent form, head-to-head records (if any exist), and surface preference rather than absolute skill gaps. The 100% probability here likely reflects either a lack of market liquidity or an absence of meaningful betting information rather than certainty about the outcome.

Traders should monitor the official ATP schedule for any withdrawal announcements, which commonly occur 48 hours before lower-tier matches. Surface conditions at the Kingston venue and recent tournament results for both players in the weeks preceding 17 August will provide concrete catalysts for probability adjustment. Injury reports or late-round qualifying results that determine seeding could shift market sentiment, particularly if either player demonstrates unexpected form. The settlement window's extension to seven days provides flexibility for weather delays or scheduling adjustments typical of summer North American tournaments.

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Best Prediction Markets, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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 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.

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.