ITF Roehampton: Charles Broom vs Oliver Tarvet

Platform comparison

Market context

Charles Broom and Oliver Tarvet met in the ITF Men Roehampton event on grass, with Broom listed around ATP 287 and Tarvet around ATP 436 in live tournament feeds. The market’s 100% YES pricing is consistent with a spot where the match appears already under way and one side is strongly favoured on ranking and form data, rather than a pure coin flip. [1][2][4]

For comparison, Broom’s recent grass results have been solid across the ITF level, while Tarvet has also posted a strong 2026 run and has been competitive enough to keep pre-match pricing from collapsing to a near-certainty in normal circumstances. TennisTemple, TennisExplorer and TennisStats all show Broom with the higher ranking and better cumulative surface profile, but not an extreme mismatch; that is the kind of setup where live state, not just pre-match rating, drives conditional-order logic in automated tooling. [2][10][16][18]

The main catalysts to watch are match completion, retirement or walkover status, and any schedule disruption around Roehampton’s draw. If the scoreline is finalised in official feeds, the market should resolve to the advancing player; if play is abandoned without a winner, or delayed beyond the seven-day window, the contract falls back to 50-50 under the rules. For programmatic monitoring, the key triggers are live score updates, match status fields such as “final”, “retired” or “walkover”, and whether the event remains within the settlement deadline. [1][2][4][7]

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 Fees, 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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Kalshi Fees 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.