ITF Roehampton: Charles Broom vs Oliver Tarvet

Platform comparison

Market context

Charles Broom and Oliver Tarvet were due to meet in the ITF Men Roehampton event on grass, a level where prices can move sharply on late court assignments and walkovers. On the published pre-match board, Broom has been listed around 2.50 and Tarvet around 1.47, which implies Tarvet as the narrower favourite before settlement risk is considered.[8][19]

For market-reading purposes, the key point is that this is a short-format, low-tier event with thin liquidity and relatively limited historical head-to-head data: the two had no prior meetings in the available stats, while their recent 2026 win rates were broadly similar but not identical, with Tarvet stronger on paper in grass-only results and Broom carrying the higher ranking experience.[1][7][14] That makes a 100% crowd-implied YES position unusually hard to interpret on pure match strength alone; on Polymarket, the quoted probability format can diverge from the decimal-odds conventions used by Betfair-style books, while Smarkets and Betfair also differ in fees and access rules depending on KYC and jurisdiction.

The main catalyst is whether the match actually went ahead and was completed within the settlement window. Roehampton scores pages and bookmaker boards already showed the contest as a live/finished fixture with Broom leading and later winning 2-0, which would ordinarily make an “advance” outcome straightforward if the market is indeed tied to that match result rather than a different administrative status.[2][4][10] Traders watching cross-platform discrepancies should check official draw updates, live scoring feeds, and whether any platform is still pricing settlement risk rather than sporting outcome, because lower-tier tennis markets can lag when a result is posted on one feed but not yet reflected across exchanges and prediction markets.[2][4][15]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares ITF Roehampton: Charles Broom vs Oliver Tarvet specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. The live probability is the Polymarket mid; the comparison columns summarise each venue's fee structure, KYC, settlement currency and payment rails. Every CTA routes to Robinhood Prediction Markets, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

FAQ

Polymarket vs Kalshi — which is better?

Depends on your location. Kalshi is CFTC-regulated, US-only with full KYC. Polymarket is global, on-chain, no KYC up to $1,500. Polymarket has ~10x higher liquidity but higher regulatory risk.

Which platform has the deepest liquidity?

Polymarket — by a wide margin. Top markets reach $50-500M volume, Kalshi ~$200M cumulative, Betfair similar. Deeper liquidity means your trade moves the quote less.

Is Betfair a Polymarket alternative?

Only partially. Betfair Exchange is UK-focused with a sports-betting emphasis; they have politics markets but with thinner liquidity than Polymarket. Settlement in GBP/EUR, 2-5% commission on winnings.

Which platform is accessible globally?

Polymarket is geo-blocked in the US/UK/EU. Kalshi is US-only. Betfair and Smarkets are UK-restricted. Robinhood Prediction Markets has a different geo footprint and routes to Polymarket's order book at 0% fees.

Are all these platforms regulated?

No. Kalshi is CFTC-regulated (US). Betfair and Smarkets are UK Gambling Commission licensed. Polymarket operates without explicit regulation — a different risk profile than a regulated sportsbook.