Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
PolyGram Pick polygram.ink |
0% | 100% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on PolyGram → |
Polymarket polymarket.com |
0% | 100% | 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
Tereza Valentova, the Czech qualifier, faces Poland's Magda Linette in the opening round of Roland Garros on 24 May 2026. Linette enters as the seeded player with a career ranking peak of 18th and regular WTA main-draw experience; Valentova, ranked outside the top 100, qualified through the preliminary rounds. The match carries standard clay-court variables—surface preference, recent form on red clay, and injury status—that typically drive volatility in early-round women's singles markets.
The 0% implied probability reflects either extreme illiquidity or a technical settlement condition rather than genuine confidence in Linette's victory. Comparable first-round matchups between seeded players and qualifiers historically show 70–85% win rates for the seeded player, though upsets occur regularly enough that markets usually price them between 15–30%. The absence of trading activity here suggests insufficient deposit flow or payment-rail friction preventing traders from entering positions. On platforms accepting SEPA transfers, Klarna instalments, and USDC settlement, early-round tennis markets typically require £50–£500 minimum stakes to generate meaningful liquidity; without that on-ramp traction, even well-defined matchups remain dormant.
Watch for injury announcements or withdrawal notices before 23 May, as either player's fitness status could trigger late repricing. Recent WTA scheduling changes and clay-court preparation tournaments in May will signal form; Linette's performance at warm-up events and Valentova's qualifying run trajectory are the key catalysts. Settlement occurs 31 May, allowing seven days for completion or rescheduling before the 50-50 tie-break clause activates.
Methodology
We track Roland Garros WTA: Tereza Valentova vs Magda Linette 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
- 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.
- Is this market available outside the US?
- PolyGram 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, 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.
Trade Roland Garros WTA: Tereza Valentova vs Magda Linette on PolyGram
Live order book, 0% fees, USDC settlement in seconds.
Trade on PolyGram →