Lexus Eastbourne Open: Zizou Bergs vs Toby Samuel

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Active sub-markets

Market context

The underlying event is a men’s singles tennis match between Zizou Bergs and Toby Samuel at the Lexus Eastbourne Open, originally set for 6:00 AM ET on 26 June 2026. This grass-court tournament, running from 22 to 27 June in Eastbourne, Great Britain, serves as a key warm-up for Wimbledon, with Bergs and Samuel competing for advancement in the draw[1][3].

Historical precedents in sports prediction markets show that 100% YES probabilities often reflect near-certain outcomes, similar to how Eurovision splits votes between jury and public (50/50) or the Oscars use preferential ballots for Best Picture to avoid ties[6]. In tennis, matches rarely end in ties, and cancellations are uncommon unless weather intervenes; thus, the market’s certainty aligns with the sport’s structural norms where advancement is binary and delays beyond seven days are exceptional[4].

Traders should monitor the ATP daily schedule for Bergs’ and Samuel’s next-round assignments, as well as any weather advisories for Eastbourne that could disrupt play[4]. Recent updates from the LTA confirm the tournament is proceeding without major disruptions, but any delay beyond the seven-day window would trigger a 50-50 resolution[1]. With the settlement window ending 3 July 2026, the primary catalyst is the official announcement of match completion and the confirmed winner advancing in the draw[2].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Lexus Eastbourne Open: Zizou Bergs vs Toby Samuel 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

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?

On PolyGram, 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?

PolyGram 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.

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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in minutes.