Roland Garros ATP: James Duckworth vs Rafael Jodar

Platform comparison

Active sub-markets

Market context

James Duckworth, the Australian right-hander ranked outside the top 100, faces Rafael Jodar, a Spanish qualifier, in the opening round of Roland Garros on 27 May 2026. The match carries a 0% implied probability on the current book, suggesting either extreme confidence in Duckworth's superiority or minimal liquidity at the market's inception. Settlement occurs on 3 June, allowing a seven-day window for completion before the 50-50 tie-break clause activates.

Duckworth's career record against lower-ranked opponents and qualifiers provides the baseline for assessing this probability. He has competed in multiple Grand Slams despite ranking volatility, whilst Jodar's path through qualifying remains his primary credential. Historical Roland Garros first-round upsets occur at roughly 8–12% frequency across comparable seeding disparities, though the 0% reading suggests traders may be anchoring to Duckworth's seeding status rather than match-specific variables. Comparable platforms diverge here: Kalshi's binary structure forces this into a yes/no framework, whereas Betfair's lay-betting mechanics allow traders to express doubt at fractional odds, and Smarkets' commission-based model (typically 2–5%) affects break-even thresholds differently than Kalshi's flat fee structure.

Weather delays at Roland Garros frequently extend matches beyond single-day completion. The French Open's clay-court surface and May scheduling mean rain stoppages could trigger the seven-day extension clause. Injury withdrawals during warm-up tournaments in late May will signal form; neither player has published recent injury reports as of late April 2026. Traders should monitor ATP rankings updates and qualifying-round results from the week preceding the match, as Jodar's performance against seeded players in qualifying could shift the probability materially.

Methodology

This page compares Roland Garros ATP: James Duckworth vs Rafael Jodar specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. Live odds come from the Polymarket order book; the other venues' contract details are maintained manually because their APIs aren't directly comparable. Every CTA routes to Kalshi Alternative UK, 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

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 Kalshi Alternative UK?

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

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, Kalshi Alternative UK triggers a quick verification flow that finishes in minutes.

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.