National Bank Open: Juncheng Shang vs Andrey Rublev

Platform comparison

Market context

Polymarket is pricing **Andrey Rublev** at roughly three-to-one on this contract, with the market implying about a **25%** chance that **Juncheng Shang** advances. On Polymarket, traders are buying and selling conditional tokens settled in **USDC** on **Polygon**, so the price reflects the market’s view of who will actually advance rather than simply who is favoured in abstract pre-match analysis.

That 25% sits close to other betting and forecasting snapshots. Conventional bookmakers shown in the search results have Rublev around 1.25-1.31 and Shang around 3.4-4.0, which translates to a Shang win probability in the low-to-mid 20s before margin.[1][15][17][18] The historical framing also points the same way: the pair have met once before, with Rublev winning, and the head-to-head record shown in the results is 1-0 in Rublev’s favour.[10] In other words, the current Polymarket price is not an outlier; it broadly matches the wider market’s view that Shang needs a clear overperformance to flip the result.

For traders, the main catalysts are mundane but decisive: official start time, any court or weather delay, and whether the match is completed within the settlement rules. The National Bank Open match listings place Shang vs Rublev on 4 August, with live event pages and sportsbook feeds showing the contest as scheduled rather than abandoned.[3][7][16] Because the market resolves to 50-50 if the match is cancelled, tied, or delayed more than seven days without a winner, the key on-chain question is not only who starts well, but whether the ATP draw and match completion are confirmed inside the settlement window.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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

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.

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.