Lexus Eastbourne Open, Qualification: Matteo Arnaldi vs Toby Samuel

Platform comparison

Active sub-markets

Market context

The underlying event is a qualifying match at the Lexus Eastbourne Open between Matteo Arnaldi and Toby Samuel on grass in Eastbourne. In a prediction market, a **YES** share pays out if the named outcome happens and a **NO** share pays out if it does not, so a 100% crowd-implied probability means traders are treating Arnaldi’s progression as a near-certainty. Arnaldi is reported as the stronger player on ranking and form, with an ATP ranking around 34 and a recent French Open semi-final run, while Samuel is around 144 and has the home-court familiarity that can matter on grass.[1]

For context, markets on tennis qualifiers usually move sharply when the draw, the surface, and recent fitness information line up in one direction. Eastbourne’s qualifying sheet listed Arnaldi as the no. 1 seed, which supports the view that he was expected to handle this tie, although seeding is not the same as a result and grass can narrow the gap between players with different recent records.[2] A full-price market can still be informative because it signals that participants see limited upside in opposing the favourite unless something changes before first serve.[3]

The main catalysts to watch are official schedule changes, any withdrawal before play, and the live score itself once the match begins. The market resolves on official ATP results, and if the match is cancelled, never starts, or is delayed beyond the settlement window without a winner, it falls back to 50-50 rather than paying on the pre-match favourite.[1] That means late announcements from the tournament, or a postponed start in Eastbourne’s qualifying rounds, are more relevant here than headline tennis news in general.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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 Prediction Market UK, 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?

Prediction Market UK 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.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

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