National Bank Open: Valentin Royer vs Tommy Paul

Platform comparison

Market context

Valentin Royer’s match with Tommy Paul has been priced very differently across markets, but the broad consensus still points to Paul. Prediction models in the search results cluster around an **78-83%** Paul win probability, with one model at **78%** and another at **83%**; sportsbook prices are similar, with Paul around **1.16-1.20** and Royer around **4.50-5.30**.[1][3][9][10] By contrast, this contract’s crowd-implied probability is only **11% YES**, which is far below both the bookmaker and model ranges and suggests either a contract-specific interpretation gap or a market that has not yet converged on the tennis pricing elsewhere.[11][12]

Historically, that kind of split matters because tennis match markets tend to gravitate towards the pre-match moneyline once the event is confirmed and a starting time is near, especially when one side is a clear favourite. Comparable exact-match-score and winner markets for this fixture are also heavily tilted to Paul: one predictive platform shows Paul at **78.6%** on Elo, while another gives him **78%** to **83%**, and an exact-score contract listed on Kalshi had Paul to win 2-0 at **54%**.[2][3][9][11] In other words, the current 11% here is well below the surrounding analyst and sportsbook consensus.

For traders, the main catalysts are whether the match actually begins on schedule and whether the tournament order of play changes. The market resolves to 50-50 if the match is not played, ends in a tie, or is delayed more than seven days without a winner, so any withdrawal, postponement, or reshuffle at the National Bank Open matters as much as the price itself.[8] Live score services were already listing the fixture around the scheduled August 6 window, so the key watchpoints are official ATP/tournament updates, a confirmed start time, and any late injury or walkover news that would force the contract into its fallback outcome rather than a straightforward Paul win.[7][13][14]

Sources: 1 · 2 · 3 · 4 · 5

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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.