Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
PolyGram Pick polygram.ink |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on PolyGram → |
Polymarket polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open on PolyGram → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open on PolyGram → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open on PolyGram → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open on PolyGram → |
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 PolyGram.
Active sub-markets
Market context
Kokkinakis and Atmane are scheduled to meet in the opening round of Roland Garros in late May 2026, with the crowd currently pricing Kokkinakis at 22 per cent to advance. The Australian has competed regularly on clay but remains inconsistent at Grand Slams, whilst Atmane represents emerging French talent with limited exposure at the highest level. The 22 per cent probability suggests the market views this as a clear favourite's match, though the specific identity of that favourite depends on which player the consensus has positioned as the stronger competitor.
Historical precedent matters here. Kokkinakis has shown he can trouble top-ranked players on his day but has also exited early from major tournaments to unseeded opponents. Atmane, if he is the higher-ranked player or seeded, would typically command 70–75 per cent implied probability in an opening-round matchup. If Kokkinakis is favoured instead, 22 per cent suggests the market is pricing Atmane as a genuine upset candidate—perhaps reflecting recent form, a favourable draw, or injury concerns around Kokkinakis that have not yet surfaced publicly.
Traders should monitor official Roland Garros seeding announcements and any injury updates in the fortnight before the match. Court assignment and weather conditions on clay can shift momentum significantly in early-round encounters. Recent ATP rankings and head-to-head records, if available, will clarify whether 22 per cent undervalues or overvalues the underdog. The settlement window extends to 31 May, providing a buffer for scheduling delays common at clay majors.
Methodology
We track Roland Garros ATP: Thanasi Kokkinakis vs Terence Atmane on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.
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
- 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.
- 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, PolyGram 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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