National Bank Open: Zizou Bergs vs Ben Shelton

Platform comparison

Market context

Polymarket has this **Bergs vs Shelton** contract priced at **0% YES** today, which means the market is effectively treating a Shelton advance as already reflected in the tape or seeing no realistic path to a Bergs win on the current information. On Polymarket, buyers fund positions in USDC on Polygon, and the contract settles through conditional tokens, so the key question is not the scoreline style but whether Bergs advances, Shelton advances, or the match fails to produce a winner under the market rules.

That near-zero price is consistent with the wider tennis market: multiple bookmakers and preview sites list Shelton as a strong favourite, with implied probabilities around the mid-90s to high-90s range and outright odds near 1.33–1.40 for Shelton versus roughly 3.0–3.6 for Bergs.[1][2][11] Tennis Temple’s match page also shows Shelton as the much shorter-priced player, while Tennis.com’s projection gives Shelton a 70% winner forecast, which is still far above Bergs but notably less extreme than the bookmaker consensus.[9][12] For Polymarket traders, that gap matters because a 0% YES line leaves little room for a pre-match surprise unless the market is misreading availability or format risk.

The main catalysts are straightforward: confirmed start time, any late withdrawal, and whether the match is actually played to completion within the contract’s 7-day window. Polymarket’s rules say a walkover before the start, a cancellation, or an unplayed match that drifts beyond the deadline resolves to 50-50, so even a heavily one-sided price can be reset by logistics rather than performance.[7][8] The event pages currently place the match on 7 August in Montreal, with listing times around 8:40–8:45 PM UTC/ET conversion on the public schedules, so traders should watch official ATP and tournament updates closely if the slot shifts or the players’ status changes.[10][15]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews National Bank Open: Zizou Bergs vs Ben Shelton across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Polymarket Alternative UK, which mirrors the Polymarket order book at 0% fees.

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.

UK Frequently Asked Questions

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.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.