National Bank Open: Shintaro Mochizuki vs Fabian Marozsan

Platform comparison

Market context

Polymarket is pricing this Mochizuki-Marozsan contract at **0% YES** right now, which on-chain means the market is assigning virtually no chance that Shintaro Mochizuki is the eventual winner of the listed match outcome. The contract settles in USDC on Polygon through conditional tokens, so traders are really buying exposure to whether the ATP Round of 128 meeting is completed and officially resolved, not to a broader tournament view.

On the tennis side, the market is anchored by a fairly standard underdog-favourite setup: live listings and previews have Fabian Marozsan higher in the ATP rankings than Shintaro Mochizuki, with Marozsan around No. 55 and Mochizuki around No. 114 at the time of the scheduled match.[2][8] Preview services and projected-win models also lean Marozsan, with Tennis.com showing 63% for Marozsan and 37% for Mochizuki, while head-to-head records show no prior meetings between them.[3][4] In prediction-market terms, a 0% quote often reflects either an extremely one-sided view or a stale contract with resolution risk, so the key distinction is whether the exchange is simply reflecting a heavy favourite or whether traders expect the event to be voided or delayed beyond the settlement rules.[1][3]

The catalysts to watch are straightforward: whether the first-round match is actually played at Stade IGA, whether the start time shifts again, and whether either player withdraws before first ball. Multiple listings place the match on hard court in Montreal on 3–4 August 2026, but they differ slightly on timing, which matters for a market with a seven-day delay clause and a fallback to 50-50 if no winner is determined.[1][8][12] If the fixture is completed, the conditional token resolution should track the official ATP result; if it is postponed, cancelled, or left unfinished, Polymarket’s settlement language becomes the tradeable risk rather than the tennis line itself.

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 Kalshi UK, which mirrors the Polymarket order book directly.

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 Kalshi UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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.

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.