Tampere: Gauthier Onclin vs Tom Gentzsch

Platform comparison

Market context

Gauthier Onclin and Tom Gentzsch are scheduled to meet in the Tampere Open quarter-final, and the market will settle on whichever player advances from that match; if it is not played, finishes level, or is delayed beyond seven days without a winner, it goes 50-50 instead. In prediction-market terms, a **YES** share pays out if the named outcome happens, while a **NO** share pays out if it does not.

The current crowd-implied price of **100% YES** implies traders see Onclin’s advance as essentially certain, but that should be read against the actual sporting setup rather than as a guarantee. Recent tennis previews are mixed: Tennis.com lists Gentzsch as the projected winner by a narrow margin, while Tennis Tonic’s preview leans to Onclin, showing that pre-match views can diverge sharply even when the market is heavily one-sided.[1][3] That is a useful reminder for newcomers that prediction markets reflect collective pricing, not certainty.

For traders, the main catalysts are straightforward: the official match status, any late schedule change, and whether the quarter-final actually starts and reaches a completed result before the market’s settlement window closes. The listed start time has also varied across sources, with one live score page showing 09:00 local time, so checking the tournament draw and live order of play matters more than relying on a single preview page.[2] If the match is postponed, interrupted, or revised by the event organisers, that can matter as much as the pre-match odds.[1][2]

Sources: 1 · 2 · 3

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

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.

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.