National Bank Open: Daniel Merida Aguilar vs Learner Tien

Platform comparison

Market context

Daniel Merida Aguilar’s quarter-final with Learner Tien at the National Bank Open has been priced as a near-certain Tien advance in peer-to-peer markets, yet the current **0% YES** on this contract is materially below the live pricing seen elsewhere. Independent tennis feeds list Tien as the higher-rated player and the stronger hard-court performer, with no prior tour-level head-to-head and pre-match probability estimates around 76-89% for Tien rather than anything close to a clean sweep[11][15][16][18]. That gap matters on Polymarket because the market settles to the named player only if he advances; by contrast, a cancelled, tied, or sufficiently delayed match resolves 50-50, so a pure win/loss read is not the only path to outcome risk.

Comparable ATP quarter-finals show why a zero print can be misleading when the event is already at or beyond scheduled start: Betfair and Smarkets quote the same underlying contest in odds terms, while Polymarket and Kalshi express it as implied probability, and the two formats can diverge once fees, spreads and KYC access are layered in. On a match like this, a trader would watch whether the Centre Court schedule slips, whether the tie is completed the same day, and whether any retirement or suspension occurs before full completion. Recent match trackers and results services already list the contest as played on hard court in Montreal, with Tien progressing in straight sets, which would make the named-player outcome decisive if the market had not already been repriced[3][5][7].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares National Bank Open: Daniel Merida Aguilar vs Learner Tien specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Robinhood Prediction Markets, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

FAQ

Polymarket vs Kalshi — which is better?

Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.

What does Polymarket cost vs Kalshi?

Polymarket: 0% fees, only Polygon network costs (~$0.01/trade). Kalshi: up to 7% per trade plus spread. For high-frequency traders, Polymarket is dramatically cheaper.

Is Betfair a Polymarket alternative?

Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.

What about Smarkets as an alternative?

Smarkets is a UK betting exchange with a lower default commission (2%) than Betfair. Liquidity on political markets is below Polymarket, comparable to Kalshi. Geo-blocked in many jurisdictions.

Which platform supports Klarna/SOFORT?

Directly: none. Polymarket accepts only USDC on Polygon. Robinhood Prediction Markets offers a fiat on-ramp via Klarna or SOFORT (DE/AT/CH) and converts internally to USDC for the Polymarket order book. T+1 processing.