Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Election Predictions UK) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Trade this market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Trade this market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Trade this market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Trade this market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto Set 1 O/U 8.5 | 100% |
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto Set 1 O/U 9.5 | 100% |
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto Match O/U 38.5 | 57% |
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto Game Spread +/-2.5 | 56% |
| Completed Match | 50% |
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto Set 2 O/U 8.5 | 50% |
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto Total Sets: O/U 3.5 | 50% |
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto Match O/U 36.5 | 50% |
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto Set Handicap +/-1.5 | 50% |
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto Set 2 O/U 9.5 | 50% |
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto Total Sets: O/U 4.5 | 50% |
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto Set 2 O/U 10.5 | 50% |
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto Set 4 Winner | 50% |
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto Set 3 O/U 8.5 | 50% |
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto Set 3 O/U 9.5 | 50% |
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto Set 3 O/U 10.5 | 50% |
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto Set 4 O/U 8.5 | 50% |
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto Set 4 O/U 9.5 | 50% |
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto Set 4 O/U 10.5 | 50% |
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto Set 2 Winner | 48% |
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto Match O/U 40.5 | 48% |
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto Set 3 Winner | 43% |
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto Set Handicap +/-2.5 | 33% |
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto | 27% |
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto Set 1 Winner | 0% |
| US Open ATP: Aleksandar Vukic vs Rei Sakamoto Set 1 O/U 10.5 | 0% |
Market context
Traders on decentralised prediction markets give 100% probability to us open atp: aleksandar vukic vs rei sakamoto. This market refers to the tennis match between Aleksandar Vukic and Rei Sakamoto in the US Open ATP, originally scheduled for August 30, 2026 at 11:00AM ET. This market will resolve to 'Aleksandar Vu…
Methodology
Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for US Open ATP: Aleksandar Vukic vs Rei Sakamoto plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.
Resolution & payout
For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.
UK Frequently Asked Questions
- What resolution source is used for elections?
- Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.
- Which platform has the deepest political liquidity?
- Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Election Predictions UK route into the same order book at 0% fees.
- How fast do political markets react to news?
- High-liquidity markets move within seconds to minutes. A Trump tweet on the economy can shift the "Trump 2024" market 2-5 points before mainstream media has written anything.
- Are political prediction markets legal in my country?
- It varies. They sit in legal gray areas in most jurisdictions. Polymarket is geo-blocked from US/UK/EU; some broker frontends have a different geo footprint. Trade only with capital you can afford to lose, and only if you understand the legal status in your jurisdiction.
- Are UK election prediction markets available from the UK?
- Yes. Betfair Exchange and Smarkets offer UKGC-regulated UK election markets (seat counts, party share, constituency results). Polymarket also lists UK election contracts with deeper global liquidity. Betfair winnings are typically tax-free for UK individuals; Polymarket profits are subject to HMRC CGT.
Trade US Open ATP: Aleksandar Vukic vs Rei Sakamoto on Election Predictions UK
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