Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Sport Prediction Pick polygram.ink |
99% | 1% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open on Sport Prediction → |
Polymarket polymarket.com |
99% | 1% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open on Sport Prediction → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open on Sport Prediction → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open on Sport Prediction → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open on Sport Prediction → |
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 Sport Prediction.
Active sub-markets
| Completed Match | 99% YES | 1% NO |
| Grass Court Championships: Donna Vekic vs Alexandra Eala Set 2 Winner | 0% Vekic | 100% Eala |
| Grass Court Championships: Donna Vekic vs Alexandra Eala Match O/U 22.5 | 0% Over | 100% Under |
| Grass Court Championships: Donna Vekic vs Alexandra Eala Match O/U 23.5 | 0% Over | 100% Under |
| Grass Court Championships: Donna Vekic vs Alexandra Eala | 0% Donna Vekic | 100% Alexandra Eala |
| Grass Court Championships: Donna Vekic vs Alexandra Eala Set 1 O/U 8.5 | 100% Over | 0% Under |
Market context
Donna Vekic and Alexandra Eala are scheduled to meet in the Grass Court Championships on 15 June 2026, with the market currently pricing Vekic's advancement at 51 per cent. Vekic, the Croatian world number 19, has contested multiple Grand Slam quarter-finals and semi-finals over her career, whilst Eala, the 21-year-old Filipino prospect, has climbed to approximately 120th in the rankings following a breakthrough 2025 season that included WTA 125 titles and consistent main-draw appearances at tier-one events.
The 51–49 split reflects genuine uncertainty between a seasoned mid-ranking player with grass-court experience and an ascending junior-to-professional transition case. Vekic's grass record shows moderate success—she reached the Wimbledon third round in 2024 and has played ITF grass events regularly—whilst Eala's grass exposure remains limited, though her rapid improvement across surfaces and strong baseline game suggest adaptability. Historical precedent favours established players in such matchups, yet Eala's trajectory and the relative thinness of Vekic's recent form (no titles since 2023) complicate the calculus.
Traders should monitor injury bulletins and late withdrawals through the settlement window closing 22 June. Any coaching announcements or fitness updates from either camp in the fortnight before the match could shift the probability materially. The scheduling—originally 4:00 AM ET—may also affect match quality and completion risk, particularly if weather delays push play beyond the seven-day buffer built into the resolution criteria.
Methodology
This page reviews Grass Court Championships: Donna Vekic vs Alexandra Eala 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 Sport Prediction — 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 Sport Prediction, 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?
- Sport Prediction 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.
- 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 Sport Prediction?
- Zero. Sport Prediction 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.
Trade Grass Court Championships: Donna Vekic vs Alexandra … on Sport Prediction
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