Mubadala Citi DC Open: Alejandro Tabilo vs Tallon Griekspoor

Platform comparison

Market context

Alejandro Tabilo and Tallon Griekspoor are due to meet at the Mubadala Citi DC Open, and the market is pricing Tabilo at **42%** despite several external models leaning the other way. That sits below the sportsbook view in the available preview data: Tennis Tonic lists Griekspoor as the pick, with opening prices of **1.71** for Griekspoor and **2.13** for Tabilo, while String Tension’s Elo-based projection also favours Griekspoor at **56.8%** to Tabilo’s **43.2%**.[2][1]

The split is useful context for reading this contract. A market near 42% implies a modest underdog position for Tabilo, but it is still close enough to an even contest that small changes in team news, draw conditions, or pre-match fitness could move the price sharply. By contrast, the analyst and model consensus in the current search results is more Griekspoor-leaning than the prediction market, with one analytics source calling Tabilo a **52%** favourite and another two sources backing Griekspoor, which shows the pre-match range is not fully settled.[3][2][1]

For traders, the main catalysts are straightforward: whether the match remains on the published schedule, whether either player withdraws or is delayed by earlier-order scheduling, and whether any late injury or fitness update shifts the likely winner before first ball. This market also has a built-in fallback to **50-50** if the match is not played, tied, or delayed more than seven days without a winner, so any disruption to the Washington schedule matters as much as the on-court matchup itself. The most relevant pricing signals are therefore the final sportsbook move, any last-minute analyst revisions, and confirmation that the match begins on time and is completed.[2][3]

Sources: 1 · 2 · 3

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 Best Prediction Markets UK, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

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.

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?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets UK 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.