Roland Garros ATP: Ignacio Buse vs Andrey Rublev

Platform comparison

Active sub-markets

Market context

Ignacio Buse, the Peruvian qualifier ranked outside the top 200, faces world number six Andrey Rublev in the opening round of Roland Garros in May 2026. The 34% implied probability on Polymarket reflects a significant underdog position for Buse, though the crowd-sourced assessment sits notably higher than the decimal odds typically offered on Betfair or Smarkets for such mismatches, where Rublev would likely trade closer to 1.15–1.20. The scheduling at 05:00 ET suggests an early court assignment, potentially a secondary surface, which historically favours neither player distinctly but does compress the trading window for European-based participants on Kalshi, where US-domiciled traders face different fee structures and KYC requirements than UK platforms.

Rublev's recent form through the spring clay season will be the primary catalyst. His record at Roland Garros shows mixed results—he reached the quarter-finals in 2020 but has struggled with consistency in subsequent years, particularly against lower-ranked opponents who adopt aggressive baseline tactics. Buse's pathway through qualifying would have required three consecutive victories, a metric that historically correlates with momentum in early-round matchups. The ATP's official draw release, typically four weeks before the tournament, will confirm seeding and potential draw positioning; any late withdrawals or injury updates from either player could shift the 34% significantly, particularly on platforms like Smarkets where liquidity concentrates around confirmed lineups.

The settlement window extends to 31 May, allowing seven days beyond the scheduled date for completion. This buffer accommodates weather delays common at Roland Garros, though the 50-50 resolution clause for matches unfinished beyond that threshold creates a distinct risk profile compared to Betfair's standard match-odds markets, which typically void rather than split stakes.

Methodology

This page compares Roland Garros ATP: Ignacio Buse vs Andrey Rublev 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 PolyGram, 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

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.

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.

What does it cost to trade on PolyGram?

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

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.