Los Cabos Open: Coleman Wong vs Jenson Brooksby

Platform comparison

Market context

The real-world event is a scheduled ATP Los Cabos match between Coleman Wong and Jenson Brooksby, and the market pays out on which player *advances* if the contest is completed as planned. In prediction-market terms, a YES or NO share is simply a claim on one side of the outcome: here, the contract resolves to Coleman Wong if he advances, Jenson Brooksby if he advances, and to 50-50 if the match is not played, ends level, or is pushed beyond the seven-day limit without a winner.[12][16]

The 100% crowd-implied probability is consistent with the market trading as if Brooksby’s side is a near-certain winner, but that should be read as sentiment rather than certainty. Comparable price signals around this fixture also lean Brooksby: one live odds page lists him as the preferred side, and tennis preview sites showed Brooksby ahead in pre-match probabilities, while the head-to-head record is 1-0 to Brooksby after a straight-sets win in February 2025.[2][3][17]

What matters for traders is not just form, but whether the match is actually staged on the published schedule. Tennis markets can move sharply if start times shift, if a player withdraws, or if weather or court scheduling interrupts play, because a no-contest or prolonged delay can trigger the contract’s 50-50 fallback. Current live listings place the match at Los Cabos Grandstand on 31 July, with scoreboards already set up for play, so the main catalysts are official order-of-play updates, any late injury or retirement news, and whether the match begins and reaches a winner within the settlement window.[3][5][7]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Los Cabos Open: Coleman Wong vs Jenson Brooksby 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

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 Prediction Market UK. 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.

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 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.