Tampere: Gauthier Onclin vs Tom Gentzsch

Platform comparison

Market context

The Tampere quarter-final between Gauthier Onclin and Tom Gentzsch is being priced very differently across venues: Tennis.com’s model has Gentzsch only narrowly ahead at 52% to Onclin’s 48%, while the prediction market is showing a near-certain **100% YES** for Onclin advancing. That is a very large gap, and it usually means the contract is reflecting either a strong assumption about match completion or a market that has already been driven towards one side, rather than a clean read on the likely tennis result.[1][5]

Comparable pre-match guides are much closer to a coin flip than the contract suggests. 365Scores is listing the match with standard betting markets available but does not, in the snippet provided, show a lopsided consensus, and Tennis.com’s projection implies only a slight edge for Gentzsch rather than a dominant favourite.[2][1] That makes the contract’s 100% crowd-implied probability look detached from the broader analyst baseline, especially for a Challenger-level quarter-final where small differences in serve performance and recent form often move the price more than reputation alone.[1][2][3]

The key trader watchpoints are straightforward: whether the match actually starts on schedule, whether the draw is updated late, and whether either player withdraws or retires after play begins. The contract’s settlement rules mean a completed advancement decision matters, while a cancellation, tie, or delay beyond seven days would force a 50-50 outcome instead of a winner.[5] Recent preview coverage frames this as a normal quarter-final with projected draw context rather than a settled mismatch, so any late injury or scheduling news would matter more here than in a one-sided ATP Tour match.[3]

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 Best Prediction Markets, which mirrors the Polymarket order book directly.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

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 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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets 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.