National Bank Open: Daniel Merida Aguilar vs Learner Tien

Platform comparison

Market context

Daniel Merida Aguilar’s match with Learner Tien in Montreal has been priced with Tien as the clear favourite, while the market’s 3% implied chance for a Merida Aguilar win reflects a steep gap versus that baseline. Tennis books had Tien around -210 to -212 and Merida Aguilar around +170 to +175, which broadly matches the idea that the underdog needs either a fast start or a clean serving day to force an upset.[1][8] Third-party models were also materially higher on Tien, including a Tennis Tonic preview that picked Tien, and an Elo-style projection from String Tension giving Tien about 76.3%.[2][3]

Recent comparable pricing suggests this contract is more sensitive to draw context and surface than to headline ranking alone. National Bank Open matches on outdoor hard courts tend to reward the player with the stronger return profile and more stable hold rate, and pre-match projections on Tennis.com put Tien’s win chance at about 65% while still leaving room for a competitive two- or three-set match.[11] That matters for prediction-market reading because a low YES price can still be rational if the favourite’s edge is real but not overwhelming, especially when the settlement outcome depends on a completed match rather than a walkover or delayed finish.[6]

For traders, the main catalysts are confirmation of the start time, any late scheduling changes, and whether either player has a physical issue or prior-round fatigue that affects pre-match pricing. The match was listed for 11 August around 4 p.m. local time on several tennis listings, while later live odds feeds showed it moving into a live window, so operational timing is part of the contract’s risk as much as the tennis itself.[1][9][15] Because the market settles in USDC, short-dated BTC or ETH volatility matters mainly through platform-wide liquidity and risk appetite rather than the match fundamentals, but sharp crypto moves can still affect how quickly odds and order books reprice around any tennis news.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

UK Frequently Asked Questions

What are crypto prediction markets?

Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.

What does a transaction cost on Polygon?

Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.

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%.