Dota 2: Team Spirit vs Aurora (BO3) - The International Group Stage

Platform comparison

Market context

Team Spirit and Aurora will face off in a best-of-three Dota 2 match during The International Group Stage on 13 August 2026 at 22:00 ET. The conditional token contract on Polygon currently prices Team Spirit's victory at 56% implied probability, with settlement denominated in USDC. This reflects modest favouritism toward the Russian organisation, though the market has priced in meaningful uncertainty around Aurora's competitive standing heading into the tournament.

Historical precedent suggests Group Stage matchups at The International often compress probability gaps between seeded and unseeded teams. Team Spirit won The International 10 in 2021 and finished runner-up at TI11, establishing them as a perennial top-four threat; however, Aurora's qualification pathway and recent LAN performance will materially affect how the market reprices before kickoff. Previous Group Stage encounters between established powerhouses and emerging rosters have frequently resolved closer than pre-tournament odds suggested, particularly when Aurora-tier organisations field rosters with strong mid-game coordination or unconventional draft strategies.

Traders should monitor roster confirmations and any last-minute stand-in announcements through early August, as player availability directly influences win probability. Patch notes released before the tournament commence will also shift meta assumptions; Team Spirit's historical strength in adapting to patch changes could widen their edge if the meta favours their core player strengths. The seven-day postponement window means any delay triggered after 22:00 ET on 13 August will extend the settlement deadline accordingly, creating operational risk for positions held through that threshold.

Methodology

We track Dota 2: Team Spirit vs Aurora (BO3) - The International Group Stage across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

UK Frequently Asked Questions

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Polymarket Scam?. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.