National Bank Open: Learner Tien vs Tommy Paul

Platform comparison

Market context

Learner Tien’s match with Tommy Paul at the National Bank Open is priced by the crowd at **39%** for Tien, leaving **Tommy Paul as the clear favourite** in consensus terms. That sits broadly in line with the market make-up elsewhere: multiple pre-match books and model pages have Paul around the low-60s to high-70s in win probability, with Tien generally in the mid-30s to low-40s. [3][7][11][14]

For handicappers, the key historical frame is that this is the sort of pricing where the favourite often carries the stronger baseline numbers, but the underdog can still offer value if the match profile leans towards length or volatility. Recent previews have leaned Paul, including calls for him in three sets, which is consistent with the idea that Tien’s route is more plausible if he can drag rallies and keep the score tight rather than trade cleanly on raw serve-and-return power. [4][10][18]

The main catalysts are straightforward: the market should only move materially if there is a confirmed change to the schedule, a delayed start, or any official update on court assignment and order of play. One live odds feed had the meeting listed for 8 August after an original 7 August slot, which matters because settlement is tied to whether the match is actually completed or pushed beyond the market’s seven-day tolerance; if that happens, the market can revert to 50-50. [1][14]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track National Bank Open: Learner Tien vs Tommy Paul across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Who Will Win 2026. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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 Who Will Win 2026 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.