HSBC Championships: Harriet Dart vs Liudmila Samsonova

Platform comparison

Active sub-markets

Market context

Harriet Dart and Liudmila Samsonova are scheduled to meet in the HSBC Championships, a WTA 1000 event, on 8 June 2026. The current prediction-market probability sits at 100% YES, implying near-certainty that the match will occur and produce a decisive result by the settlement deadline of 15 June. This extreme confidence diverges sharply from typical sportsbook pricing on comparable WTA matches, where even heavily favoured outcomes rarely trade above 95% implied probability. The gap suggests either that prediction-market participants are discounting cancellation and delay risk more aggressively than traditional oddsmakers, or that the settlement rules—which resolve to 50-50 if the match extends beyond seven days without completion—are being underweighted by traders.

Historical precedent offers context: WTA 1000 events rarely see matches cancelled outright, though weather delays and player withdrawals do occur. Dart has competed in six HSBC Championships appearances since 2019, whilst Samsonova has entered the draw twice. Neither player has a pattern of late withdrawals. The key catalyst to monitor is official draw confirmation and any injury updates in the week preceding 8 June. Sportsbooks typically adjust match-outcome odds only after draw confirmation; prediction-market traders should watch for divergence between sportsbook lines on the head-to-head outcome and the binary resolution probability. If either player reports injury or if the draw is reshuffled, the 100% probability would face immediate pressure.

Methodology

We track HSBC Championships: Harriet Dart vs Liudmila Samsonova on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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

Where can I trade this market with the lowest fees?

On Best Prediction Markets, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Best Prediction Markets is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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 it cost to trade on Best Prediction Markets?

Zero. Best Prediction Markets routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.