Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Kalshi UK Pick polygram.ink |
59% | 41% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on Kalshi UK → |
Polymarket polymarket.com |
59% | 41% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open on Kalshi UK → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open on Kalshi UK → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open on Kalshi UK → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open on Kalshi UK → |
Live odds for Polymarket-based markets come from the Polygon order book. Non-Polymarket venues show attributes only; clicking any row opens the market on Kalshi UK.
Active sub-markets
Market context
Auger-Aliassime enters this Roland Garros first-round encounter as the higher-ranked player, yet Polymarket's conditional token pricing reflects genuine uncertainty: the market currently values his progression at 43%, implying near-parity with Altmaier's chances. On-chain liquidity sits across USDC pairs on Polygon, with the binary settlement hinging entirely on match completion by 31 May 2026. The early morning slot (5:00 AM ET on 24 May) presents logistical variables that traders monitoring the contract should factor into position sizing.
Altmaier's clay-court record provides the primary historical lens for reading this probability. The German has demonstrated surprising resilience on Roland Garros surfaces in previous campaigns, including runs that extended beyond opening rounds. Auger-Aliassime, conversely, has shown inconsistency at the French Open relative to his hard-court performances, with several early exits across recent seasons. This pattern—rather than raw ranking gaps—explains why the crowd-implied odds refuse to price the Canadian as a heavy favourite despite his seeding advantage.
Traders should monitor official Roland Garros draw confirmations and any weather delays affecting the clay courts, as the settlement window's seven-day buffer means matches rescheduled beyond 31 May would trigger the 50-50 resolution clause. Injury reports in the week preceding 24 May remain critical; either player withdrawing would void the contract entirely. Court assignment announcements typically arrive 48 hours before play, potentially shifting on-chain pricing as surface-specific form data becomes concrete.
Methodology
This page reviews Roland Garros ATP: Felix Auger-Aliassime vs Daniel Altmaier across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Kalshi UK — the application we operate, where you trade directly against the Polymarket order book at 0% fees.
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 Kalshi 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?
- Kalshi 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.
- 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 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.
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